如何将 HSQLDB 与 Spring Boot 正确集成？
How to correctly integrate HSQLDB with Spring Boot?
我看到了这个 post : 但无法让它工作。
我的目标是构建一个 Spring 启动应用
- 以服务器模式启动 HSQLDB，具有文件持久性（以便在我重新启动我的应用程序时取回它）
- 公开与此 hsqldb 实例通信的 public API
- 让我可以远程连接到这个 hsqldb 服务器，例如使用 hsqldb.jar 中包含的嵌入式 Swing 应用程序。
所以我尝试重现引用post的标记答案：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="hqlServer" class="org.hsqldb.server.Server" init-method="start" destroy-method="stop">
<property name="properties"><bean class="org.hsqldb.persist.HsqlProperties">
<constructor-arg><props>
<prop key="server.database.0">file:/tmp/mydb.db</prop>
<prop key="server.dbname.0">mydb</prop><!--DB name for network connection-->
<prop key="server.no_system_exit">true</prop>
<prop key="server.port">9001</prop><!--default port is 9001 -->
<prop key="server.remote_open">true</prop>
</props></constructor-arg>
</bean></property>
</bean>
</beans>
我知道我接下来可以连接到 jdbc:hsqldb:hsql://localhost:9001/mydb，对吗？
嗯，我把所有的参数都指定到我的 application.yml
spring:
profiles:
active: dev
datasource:
driver-class-name: org.hsqldb.jdbc.JDBCDriver
url: jdbc:hsqldb:hsql://localhost:9001/mydb
username: sa
password:
jpa:
database-platform: org.hibernate.dialect.HSQLDialect
show-sql: true
hibernate:
ddl-auto: update
最后，开发了 App 部分（Controller、Services 和 JPA 层）。
我还将 xml 部分包含到应用程序中
@SpringBootApplication
@ImportResource(value="classpath:/hsql_cfg.xml")
public class MyApp {
...
}
但是，很明显，它不起作用并给我以下错误：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
[32m :: Spring Boot :: [39m [2m (v2.2.2.RELEASE)[0;39m
[2m2021-11-17 15:19:56.295[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mtest.MyApp [0;39m [2m:[0;39m Starting MyApp on iMac.local with PID 47627 (/Users/ludovic/workspace/test-hsqldb/target/classes started by ludovic in /Users/ludovic/workspace/test-hsqldb)
[2m2021-11-17 15:19:56.298[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mtest.MyApp [0;39m [2m:[0;39m The following profiles are active: dev
[2m2021-11-17 15:19:56.709[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Bootstrapping Spring Data JPA repositories in DEFAULT mode.
[2m2021-11-17 15:19:56.724[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Finished Spring Data repository scanning in 8ms. Found 0 JPA repository interfaces.
[2m2021-11-17 15:19:57.009[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.jpa.internal.util.LogHelper [0;39m [2m:[0;39m HHH000204: Processing PersistenceUnitInfo [name: default]
[2m2021-11-17 15:19:57.057[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.Version [0;39m [2m:[0;39m HHH000412: Hibernate Core {5.4.9.Final}
[2m2021-11-17 15:19:57.166[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.annotations.common.Version [0;39m [2m:[0;39m HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
[2m2021-11-17 15:19:57.241[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Starting...
[2m2021-11-17 15:19:57.285[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.pool.HikariPool [0;39m [2m:[0;39m HikariPool-1 - Exception during pool initialization.
java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCDriver.run(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
Caused by: org.hsqldb.HsqlException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.ClientConnection.openConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.initConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 2 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_241]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:555) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:451) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:228) ~[na:1.8.0_241]
at org.hsqldb.server.HsqlSocketFactory.createSocket(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 5 common frames omitted
[2m2021-11-17 15:19:57.286[0;39m [33m WARN[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.h.e.j.e.i.JdbcEnvironmentInitiator [0;39m [2m:[0;39m HHH000342: Could not obtain connection to query metadata : java.net.ConnectException: Connection refused (Connection refused)
[2m2021-11-17 15:19:57.296[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.dialect.Dialect [0;39m [2m:[0;39m HHH000400: Using dialect: org.hibernate.dialect.HSQLDialect
[2m2021-11-17 15:19:57.439[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Starting...
[2m2021-11-17 15:19:57.441[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.pool.HikariPool [0;39m [2m:[0;39m HikariPool-1 - Exception during pool initialization.
java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCDriver.run(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
Caused by: org.hsqldb.HsqlException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.ClientConnection.openConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.initConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 2 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_241]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:555) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:451) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:228) ~[na:1.8.0_241]
at org.hsqldb.server.HsqlSocketFactory.createSocket(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 5 common frames omitted
[2m2021-11-17 15:19:57.442[0;39m [33m WARN[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.h.engine.jdbc.spi.SqlExceptionHelper [0;39m [2m:[0;39m SQL Error: -1301, SQLState: 08001
[2m2021-11-17 15:19:57.442[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.h.engine.jdbc.spi.SqlExceptionHelper [0;39m [2m:[0;39m java.net.ConnectException: Connection refused (Connection refused)
[2m2021-11-17 15:19:57.445[0;39m [33m WARN[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.c.a.AnnotationConfigApplicationContext[0;39m [2m:[0;39m Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
[2m2021-11-17 15:19:57.450[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mConditionEvaluationReportLoggingListener[0;39m [2m:[0;39m
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
[2m2021-11-17 15:19:57.452[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.boot.SpringApplication [0;39m [2m:[0;39m Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=14=](AbstractBeanFactory.java:323) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1108) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at test.MyApp.main(MyApp.java:11) [classes/:na]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:403) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
... 15 common frames omitted
Caused by: org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:48) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl.getIsolatedConnection(DdlTransactionIsolatorNonJtaImpl.java:69) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.internal.exec.ImprovedExtractionContextImpl.getJdbcConnection(ImprovedExtractionContextImpl.java:60) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.extractMetadata(SequenceInformationExtractorLegacyImpl.java:40) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.initializeSequences(DatabaseInformationImpl.java:65) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.<init>(DatabaseInformationImpl.java:59) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.internal.Helper.buildDatabaseInformation(Helper.java:155) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:96) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:320) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:462) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1237) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
... 19 common frames omitted
Caused by: java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCDriver.run(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
Caused by: org.hsqldb.HsqlException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.ClientConnection.openConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.initConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 2 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_241]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:555) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:451) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:228) ~[na:1.8.0_241]
at org.hsqldb.server.HsqlSocketFactory.createSocket(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 5 common frames omitted
我开始考虑我的应用程序在服务器启动之前尝试连接，这可能吗？
有没有办法告诉 Spring 首先启动服务器，然后发挥它的魔力？
谢谢
这些都是非常“无条件的目标”，我 不 称其为“正确整合”，但你去吧：
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.6</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.Whosebug</groupId>
<artifactId>hsqldb-runner</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId><!-- as compile(!) dependency -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId><!-- for the endpoints -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId><!-- for simple jdbc access -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId><!-- just for fun -->
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId><!-- TODO! -->
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
在 link, an additional @Component annotation and some Properties loading 的友好帮助下，我们这样做了：
package com.Whosebug.hsqldbrunner;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Properties;
import org.hsqldb.Server;
import org.hsqldb.persist.HsqlProperties;
import org.hsqldb.server.ServerAcl.AclFormatException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.SmartLifecycle;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.stereotype.Component;
@Component
public class HyperSqlDbServer implements SmartLifecycle {
private final Logger logger = LoggerFactory.getLogger(HyperSqlDbServer.class);
private HsqlProperties properties;
private Server server;
private boolean running = false;
public HyperSqlDbServer(@Value("classpath:/hsqldb.properties") Resource serverProps) throws IOException {
Properties props = PropertiesLoaderUtils.loadProperties(serverProps);
if (props.elements().hasMoreElements() && logger.isDebugEnabled()) {
StringWriter writer = new StringWriter();
props.list(new PrintWriter(writer));
logger.debug(writer.toString());
}
properties = new HsqlProperties(props);
}
@Override
public boolean isRunning() {
if (server != null)
server.checkRunning(running);
return running;
}
@Override
public void start() {
if (server == null) {
logger.info("Starting HSQL server...");
server = new Server();
try {
server.setProperties(properties);
server.start();
running = true;
} catch (AclFormatException afe) {
logger.error("Error starting HSQL server.", afe);
} catch (IOException e) {
logger.error("Error starting HSQL server.", e);
}
}
}
@Override
public void stop() {
logger.info("Stopping HSQL server...");
if (server != null) {
server.stop();
running = false;
}
}
@Override
public int getPhase() {
return 0;
}
@Override
public boolean isAutoStartup() {
return true;
}
@Override
public void stop(Runnable runnable) {
stop();
runnable.run();
}
}
主要class/Config/Controller:
package com.Whosebug.hsqldbrunner;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@SpringBootApplication
@RestController
public class HsqldbRunnerApplication {
@Autowired
JdbcTemplate jdbcTemplate;
public static void main(String[] args) {
SpringApplication.run(HsqldbRunnerApplication.class, args);
}
@GetMapping("/query")
public List<Map<String, Object>> query(@RequestParam String sql) {
return jdbcTemplate.queryForList(sql);
}
@RequestMapping("/execute")
public void execute(@RequestParam String sql) {
jdbcTemplate.execute(sql);
}
}
然后使用此 src/main/resources/hsqldb.properties（对于服务器）：
server.database.0=file:C:/hsqldb/demobase
server.dbname.0=demobase
#server.database.n
#server.dbname.n
server.silent=false
server.trace=false
server.daemon=false
server.remote_open=true
和这个 src/main/resources/application.properties（对于客户端）：
spring.datasource.url=jdbc:hsqldb:hsql://localhost/demobase
spring.datasource.user=SA
spring.datasource.password=
..当我们 运行:
mvn spring-boot:run
我们得到：
- Start HSQLDB in server mode, with file persistence (to get it back when I restart my app)
看这里：
2021-11-17 17:35:58.652 INFO 3352 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-11-17 17:35:58.652 INFO 3352 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 313 ms
2021-11-17 17:35:58.780 INFO 3352 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-11-17 17:35:58.787 INFO 3352 --- [ restartedMain] c.s.hsqldbrunner.HyperSqlDbServer : Starting HSQL server...
[Server@71142d78]: [Thread[restartedMain,5,main]]: start() entered
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: run() entered
[Server@71142d78]: Initiating startup sequence...
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.maxdatabases=10
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.remote_open=true
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.tls=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.daemon=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.trace=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.database.0=file:C:/hsqldb/demobase
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.restart_on_shutdown=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.no_system_exit=true
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.silent=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.default_page=index.html
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.dbname.0=demobase
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.address=0.0.0.0
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.root=.
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openServerSocket() entered
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: Got server socket: ServerSocket[addr=0.0.0.0/0.0.0.0,localport=9001]
[Server@71142d78]: Server socket opened successfully in 0 ms.
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openServerSocket() exiting
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openDatabases() entered
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: Opening database: [file:C:/hsqldb/demobase ]
[Server@71142d78]: Database [index=0, id=0, db=file:C:/hsqldb/demobase , alias=demobase] opened successfully in 0 ms.
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openDatabases() exiting
[Server@71142d78]: Startup sequence completed in 0 ms.
[Server@71142d78]: 2021-11-17 16:35:58.789 HSQLDB server 2.6.0 is online on port 9001
[Server@71142d78]: To close normally, connect and execute SHUTDOWN SQL
[Server@71142d78]: From command line, use [Ctrl]+[C] to abort abruptly
[Server@71142d78]: [Thread[restartedMain,5,main]]: start() exiting
2021-11-17 17:35:58.896 INFO 3352 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-11-17 17:35:58.900 INFO 3352 --- [ restartedMain] c.s.h.HsqldbRunnerApplication : Started HsqldbRunnerApplication in 0.603 seconds (JVM running for 1330.867)
- Expose a public API that communicates with this hsqldb instance:
/execute：执行（任意）sql 没有预期结果 (jdbcTemplate.execute():void)/query: 查询(for a List<Map<String, Object>>)
例如让我们来看看这个 sql 片段：
CREATE TABLE demo(id INT NOT NULL,title VARCHAR(50),submission_date DATE,PRIMARY KEY (id));
并将其发布到我们的浏览器，如：
http://localhost:8080/execute?sql=CREATE%20TABLE%20demo(id%20INT%20NOT%20NULL,title%20VARCHAR(50),submission_date%20DATE,PRIMARY%20KEY%20(id))%3B
然后
INSERT INTO demo VALUES (1,'foo',now()),(2,'bar',now());
至：
http://localhost:8080/execute?sql=INSERT%20INTO%20demo%20VALUES%20(1%2C%27foo%27%2Cnow())%2C(2%2C%27bar%27%2Cnow())%3B
一个查询：
SELECT * FROM demo;
看起来像：
http://localhost:8080/query?sql=SELECT%20*%20FROM%20demo%3B
和returns:
[{"ID":1,"TITLE":"foo","SUBMISSION_DATE":"2021-11-17"},{"ID":2,"TITLE":"bar","SUBMISSION_DATE":"2021-11-17"}]
- Let me the possibility to connect to this hsqldb server remotely, for instance using the embedded Swing app contained into hsqldb.jar.
（远程需要测试，但是）从本地主机看是这样的：
.. 我们得到（所有）hsqldb 服务器记录到我们的 spring 应用程序。
全部合并为 github repo。
玩得开心，享受并且不要在生产中使用它！ ;)
更多链接：
甚至用这个替换 服务器组件：
@Bean(initMethod = "start", destroyMethod = "stop")
public Server hsqlServer(@Value("classpath:/hsqldb.properties") Resource props) throws IOException, AclFormatException {
Server bean = new org.hsqldb.server.Server();
bean.setProperties(PropertiesLoaderUtils.loadProperties(props));
return bean;
}
，类似于 ，显示没有问题（像魅力一样工作）。
但是，添加此依赖项：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
打破一切！ （上下文未加载:)
Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
尽快“解决”这个问题：
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.HSQLDialect
我们得到异常：
...Caused by: java.net.ConnectException: Connection refused: connect
..HikariPool 中的某处....
Solution/Workaround:
import java.io.IOException;
import javax.sql.DataSource;
import org.hsqldb.server.Server;
import org.hsqldb.server.ServerAcl.AclFormatException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
@SpringBootApplication
@EnableConfigurationProperties
public class HsqldbRunnerApplication {
public static void main(String[] args) {
SpringApplication.run(HsqldbRunnerApplication.class, args);
}
@Bean(initMethod = "start", destroyMethod = "stop")
public Server hsqlServer(@Value("classpath:/hsqldb.properties") Resource props) throws IOException, AclFormatException {
Server bean = new Server();
bean.setProperties(PropertiesLoaderUtils.loadProperties(props));
return bean;
}
@Bean
@DependsOn("hsqlServer") // This is important!!
public DataSource getDataSource(
@Autowired DataSourceProperties dsProps) {
DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create();
dataSourceBuilder.driverClassName(dsProps.getDriverClassName());
dataSourceBuilder.url(dsProps.getUrl());
dataSourceBuilder.username(dsProps.getUsername());
dataSourceBuilder.password(dsProps.getPassword());
return dataSourceBuilder.build();
}
}
所以，我们需要：
定义我们自己的数据源 bean，并依赖于（让它等待）我们的“hsqlServer”。
将 Controller 移动到新的 class(es)（这还不错，只是为了“简洁”），否则我们会得到循环的 dependencies/unset 数据源。
我看到了这个 post :
我的目标是构建一个 Spring 启动应用
- 以服务器模式启动 HSQLDB，具有文件持久性（以便在我重新启动我的应用程序时取回它）
- 公开与此 hsqldb 实例通信的 public API
- 让我可以远程连接到这个 hsqldb 服务器，例如使用 hsqldb.jar 中包含的嵌入式 Swing 应用程序。
所以我尝试重现引用post的标记答案：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="hqlServer" class="org.hsqldb.server.Server" init-method="start" destroy-method="stop">
<property name="properties"><bean class="org.hsqldb.persist.HsqlProperties">
<constructor-arg><props>
<prop key="server.database.0">file:/tmp/mydb.db</prop>
<prop key="server.dbname.0">mydb</prop><!--DB name for network connection-->
<prop key="server.no_system_exit">true</prop>
<prop key="server.port">9001</prop><!--default port is 9001 -->
<prop key="server.remote_open">true</prop>
</props></constructor-arg>
</bean></property>
</bean>
</beans>
我知道我接下来可以连接到 jdbc:hsqldb:hsql://localhost:9001/mydb，对吗？
嗯，我把所有的参数都指定到我的 application.yml
spring:
profiles:
active: dev
datasource:
driver-class-name: org.hsqldb.jdbc.JDBCDriver
url: jdbc:hsqldb:hsql://localhost:9001/mydb
username: sa
password:
jpa:
database-platform: org.hibernate.dialect.HSQLDialect
show-sql: true
hibernate:
ddl-auto: update
最后，开发了 App 部分（Controller、Services 和 JPA 层）。
我还将 xml 部分包含到应用程序中
@SpringBootApplication
@ImportResource(value="classpath:/hsql_cfg.xml")
public class MyApp {
...
}
但是，很明显，它不起作用并给我以下错误：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
[32m :: Spring Boot :: [39m [2m (v2.2.2.RELEASE)[0;39m
[2m2021-11-17 15:19:56.295[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mtest.MyApp [0;39m [2m:[0;39m Starting MyApp on iMac.local with PID 47627 (/Users/ludovic/workspace/test-hsqldb/target/classes started by ludovic in /Users/ludovic/workspace/test-hsqldb)
[2m2021-11-17 15:19:56.298[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mtest.MyApp [0;39m [2m:[0;39m The following profiles are active: dev
[2m2021-11-17 15:19:56.709[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Bootstrapping Spring Data JPA repositories in DEFAULT mode.
[2m2021-11-17 15:19:56.724[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Finished Spring Data repository scanning in 8ms. Found 0 JPA repository interfaces.
[2m2021-11-17 15:19:57.009[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.jpa.internal.util.LogHelper [0;39m [2m:[0;39m HHH000204: Processing PersistenceUnitInfo [name: default]
[2m2021-11-17 15:19:57.057[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.Version [0;39m [2m:[0;39m HHH000412: Hibernate Core {5.4.9.Final}
[2m2021-11-17 15:19:57.166[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.annotations.common.Version [0;39m [2m:[0;39m HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
[2m2021-11-17 15:19:57.241[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Starting...
[2m2021-11-17 15:19:57.285[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.pool.HikariPool [0;39m [2m:[0;39m HikariPool-1 - Exception during pool initialization.
java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCDriver.run(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
Caused by: org.hsqldb.HsqlException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.ClientConnection.openConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.initConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 2 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_241]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:555) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:451) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:228) ~[na:1.8.0_241]
at org.hsqldb.server.HsqlSocketFactory.createSocket(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 5 common frames omitted
[2m2021-11-17 15:19:57.286[0;39m [33m WARN[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.h.e.j.e.i.JdbcEnvironmentInitiator [0;39m [2m:[0;39m HHH000342: Could not obtain connection to query metadata : java.net.ConnectException: Connection refused (Connection refused)
[2m2021-11-17 15:19:57.296[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.dialect.Dialect [0;39m [2m:[0;39m HHH000400: Using dialect: org.hibernate.dialect.HSQLDialect
[2m2021-11-17 15:19:57.439[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Starting...
[2m2021-11-17 15:19:57.441[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.zaxxer.hikari.pool.HikariPool [0;39m [2m:[0;39m HikariPool-1 - Exception during pool initialization.
java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCDriver.run(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
Caused by: org.hsqldb.HsqlException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.ClientConnection.openConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.initConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 2 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_241]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:555) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:451) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:228) ~[na:1.8.0_241]
at org.hsqldb.server.HsqlSocketFactory.createSocket(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 5 common frames omitted
[2m2021-11-17 15:19:57.442[0;39m [33m WARN[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.h.engine.jdbc.spi.SqlExceptionHelper [0;39m [2m:[0;39m SQL Error: -1301, SQLState: 08001
[2m2021-11-17 15:19:57.442[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.h.engine.jdbc.spi.SqlExceptionHelper [0;39m [2m:[0;39m java.net.ConnectException: Connection refused (Connection refused)
[2m2021-11-17 15:19:57.445[0;39m [33m WARN[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.c.a.AnnotationConfigApplicationContext[0;39m [2m:[0;39m Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
[2m2021-11-17 15:19:57.450[0;39m [32m INFO[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mConditionEvaluationReportLoggingListener[0;39m [2m:[0;39m
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
[2m2021-11-17 15:19:57.452[0;39m [31mERROR[0;39m [35m47627[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.boot.SpringApplication [0;39m [2m:[0;39m Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=14=](AbstractBeanFactory.java:323) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1108) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at test.MyApp.main(MyApp.java:11) [classes/:na]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:403) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
... 15 common frames omitted
Caused by: org.hibernate.exception.JDBCConnectionException: Unable to open JDBC Connection for DDL execution
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:48) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl.getIsolatedConnection(DdlTransactionIsolatorNonJtaImpl.java:69) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.internal.exec.ImprovedExtractionContextImpl.getJdbcConnection(ImprovedExtractionContextImpl.java:60) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.extractMetadata(SequenceInformationExtractorLegacyImpl.java:40) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.initializeSequences(DatabaseInformationImpl.java:65) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.<init>(DatabaseInformationImpl.java:59) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.internal.Helper.buildDatabaseInformation(Helper.java:155) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:96) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:320) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:462) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1237) ~[hibernate-core-5.4.9.Final.jar:5.4.9.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) ~[spring-orm-5.2.2.RELEASE.jar:5.2.2.RELEASE]
... 19 common frames omitted
Caused by: java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.jdbc.JDBCDriver.run(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
Caused by: org.hsqldb.HsqlException: java.net.ConnectException: Connection refused (Connection refused)
at org.hsqldb.ClientConnection.openConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.initConnection(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
at org.hsqldb.ClientConnection.<init>(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 2 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_241]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_241]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_241]
at java.net.Socket.connect(Socket.java:555) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:451) ~[na:1.8.0_241]
at java.net.Socket.<init>(Socket.java:228) ~[na:1.8.0_241]
at org.hsqldb.server.HsqlSocketFactory.createSocket(Unknown Source) ~[hsqldb-2.4.0.jar:2.4.0]
... 5 common frames omitted
我开始考虑我的应用程序在服务器启动之前尝试连接，这可能吗？ 有没有办法告诉 Spring 首先启动服务器，然后发挥它的魔力？
谢谢
这些都是非常“无条件的目标”，我 不 称其为“正确整合”，但你去吧：
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.6</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.Whosebug</groupId>
<artifactId>hsqldb-runner</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId><!-- as compile(!) dependency -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId><!-- for the endpoints -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId><!-- for simple jdbc access -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId><!-- just for fun -->
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId><!-- TODO! -->
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
在 link, an additional @Component annotation and some Properties loading 的友好帮助下，我们这样做了：
package com.Whosebug.hsqldbrunner;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Properties;
import org.hsqldb.Server;
import org.hsqldb.persist.HsqlProperties;
import org.hsqldb.server.ServerAcl.AclFormatException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.SmartLifecycle;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.stereotype.Component;
@Component
public class HyperSqlDbServer implements SmartLifecycle {
private final Logger logger = LoggerFactory.getLogger(HyperSqlDbServer.class);
private HsqlProperties properties;
private Server server;
private boolean running = false;
public HyperSqlDbServer(@Value("classpath:/hsqldb.properties") Resource serverProps) throws IOException {
Properties props = PropertiesLoaderUtils.loadProperties(serverProps);
if (props.elements().hasMoreElements() && logger.isDebugEnabled()) {
StringWriter writer = new StringWriter();
props.list(new PrintWriter(writer));
logger.debug(writer.toString());
}
properties = new HsqlProperties(props);
}
@Override
public boolean isRunning() {
if (server != null)
server.checkRunning(running);
return running;
}
@Override
public void start() {
if (server == null) {
logger.info("Starting HSQL server...");
server = new Server();
try {
server.setProperties(properties);
server.start();
running = true;
} catch (AclFormatException afe) {
logger.error("Error starting HSQL server.", afe);
} catch (IOException e) {
logger.error("Error starting HSQL server.", e);
}
}
}
@Override
public void stop() {
logger.info("Stopping HSQL server...");
if (server != null) {
server.stop();
running = false;
}
}
@Override
public int getPhase() {
return 0;
}
@Override
public boolean isAutoStartup() {
return true;
}
@Override
public void stop(Runnable runnable) {
stop();
runnable.run();
}
}
主要class/Config/Controller:
package com.Whosebug.hsqldbrunner;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@SpringBootApplication
@RestController
public class HsqldbRunnerApplication {
@Autowired
JdbcTemplate jdbcTemplate;
public static void main(String[] args) {
SpringApplication.run(HsqldbRunnerApplication.class, args);
}
@GetMapping("/query")
public List<Map<String, Object>> query(@RequestParam String sql) {
return jdbcTemplate.queryForList(sql);
}
@RequestMapping("/execute")
public void execute(@RequestParam String sql) {
jdbcTemplate.execute(sql);
}
}
然后使用此 src/main/resources/hsqldb.properties（对于服务器）：
server.database.0=file:C:/hsqldb/demobase
server.dbname.0=demobase
#server.database.n
#server.dbname.n
server.silent=false
server.trace=false
server.daemon=false
server.remote_open=true
和这个 src/main/resources/application.properties（对于客户端）：
spring.datasource.url=jdbc:hsqldb:hsql://localhost/demobase
spring.datasource.user=SA
spring.datasource.password=
..当我们 运行:
mvn spring-boot:run
我们得到：
- Start HSQLDB in server mode, with file persistence (to get it back when I restart my app)
看这里：
2021-11-17 17:35:58.652 INFO 3352 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-11-17 17:35:58.652 INFO 3352 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 313 ms
2021-11-17 17:35:58.780 INFO 3352 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-11-17 17:35:58.787 INFO 3352 --- [ restartedMain] c.s.hsqldbrunner.HyperSqlDbServer : Starting HSQL server...
[Server@71142d78]: [Thread[restartedMain,5,main]]: start() entered
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: run() entered
[Server@71142d78]: Initiating startup sequence...
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.maxdatabases=10
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.remote_open=true
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.tls=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.daemon=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.trace=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.database.0=file:C:/hsqldb/demobase
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.restart_on_shutdown=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.no_system_exit=true
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.silent=false
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.default_page=index.html
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.dbname.0=demobase
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.address=0.0.0.0
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: server.root=.
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openServerSocket() entered
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: Got server socket: ServerSocket[addr=0.0.0.0/0.0.0.0,localport=9001]
[Server@71142d78]: Server socket opened successfully in 0 ms.
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openServerSocket() exiting
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openDatabases() entered
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: Opening database: [file:C:/hsqldb/demobase ]
[Server@71142d78]: Database [index=0, id=0, db=file:C:/hsqldb/demobase , alias=demobase] opened successfully in 0 ms.
[Server@71142d78]: [Thread[HSQLDB Server @71142d78,5,main]]: openDatabases() exiting
[Server@71142d78]: Startup sequence completed in 0 ms.
[Server@71142d78]: 2021-11-17 16:35:58.789 HSQLDB server 2.6.0 is online on port 9001
[Server@71142d78]: To close normally, connect and execute SHUTDOWN SQL
[Server@71142d78]: From command line, use [Ctrl]+[C] to abort abruptly
[Server@71142d78]: [Thread[restartedMain,5,main]]: start() exiting
2021-11-17 17:35:58.896 INFO 3352 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-11-17 17:35:58.900 INFO 3352 --- [ restartedMain] c.s.h.HsqldbRunnerApplication : Started HsqldbRunnerApplication in 0.603 seconds (JVM running for 1330.867)
- Expose a public API that communicates with this hsqldb instance:
/execute：执行（任意）sql 没有预期结果 (jdbcTemplate.execute():void)/query: 查询(for aList<Map<String, Object>>)
例如让我们来看看这个 sql 片段：
CREATE TABLE demo(id INT NOT NULL,title VARCHAR(50),submission_date DATE,PRIMARY KEY (id));
并将其发布到我们的浏览器，如：
http://localhost:8080/execute?sql=CREATE%20TABLE%20demo(id%20INT%20NOT%20NULL,title%20VARCHAR(50),submission_date%20DATE,PRIMARY%20KEY%20(id))%3B
然后
INSERT INTO demo VALUES (1,'foo',now()),(2,'bar',now());
至：
http://localhost:8080/execute?sql=INSERT%20INTO%20demo%20VALUES%20(1%2C%27foo%27%2Cnow())%2C(2%2C%27bar%27%2Cnow())%3B
一个查询：
SELECT * FROM demo;
看起来像：
http://localhost:8080/query?sql=SELECT%20*%20FROM%20demo%3B
和returns:
[{"ID":1,"TITLE":"foo","SUBMISSION_DATE":"2021-11-17"},{"ID":2,"TITLE":"bar","SUBMISSION_DATE":"2021-11-17"}]
- Let me the possibility to connect to this hsqldb server remotely, for instance using the embedded Swing app contained into hsqldb.jar.
（远程需要测试，但是）从本地主机看是这样的：
.. 我们得到（所有）hsqldb 服务器记录到我们的 spring 应用程序。
全部合并为 github repo。 玩得开心，享受并且不要在生产中使用它！ ;)
更多链接：
甚至用这个替换
@Bean(initMethod = "start", destroyMethod = "stop")
public Server hsqlServer(@Value("classpath:/hsqldb.properties") Resource props) throws IOException, AclFormatException {
Server bean = new org.hsqldb.server.Server();
bean.setProperties(PropertiesLoaderUtils.loadProperties(props));
return bean;
}
，类似于
但是，添加此依赖项：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
打破一切！ （上下文未加载:)
Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
尽快“解决”这个问题：
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.HSQLDialect
我们得到异常：
...Caused by: java.net.ConnectException: Connection refused: connect
..HikariPool 中的某处....
Solution/Workaround:
import java.io.IOException;
import javax.sql.DataSource;
import org.hsqldb.server.Server;
import org.hsqldb.server.ServerAcl.AclFormatException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
@SpringBootApplication
@EnableConfigurationProperties
public class HsqldbRunnerApplication {
public static void main(String[] args) {
SpringApplication.run(HsqldbRunnerApplication.class, args);
}
@Bean(initMethod = "start", destroyMethod = "stop")
public Server hsqlServer(@Value("classpath:/hsqldb.properties") Resource props) throws IOException, AclFormatException {
Server bean = new Server();
bean.setProperties(PropertiesLoaderUtils.loadProperties(props));
return bean;
}
@Bean
@DependsOn("hsqlServer") // This is important!!
public DataSource getDataSource(
@Autowired DataSourceProperties dsProps) {
DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create();
dataSourceBuilder.driverClassName(dsProps.getDriverClassName());
dataSourceBuilder.url(dsProps.getUrl());
dataSourceBuilder.username(dsProps.getUsername());
dataSourceBuilder.password(dsProps.getPassword());
return dataSourceBuilder.build();
}
}
所以，我们需要：
定义我们自己的数据源 bean，并依赖于（让它等待）我们的“hsqlServer”。
将 Controller 移动到新的 class(es)（这还不错，只是为了“简洁”），否则我们会得到循环的 dependencies/unset 数据源。