spring 启动应用程序启动失败，有两个数据源
spring boot application startup failed with two datasources
我在 Spring 引导应用程序中为 MySQL 使用了两个不同的 datasources。容器无法启动并出现以下错误。我还尝试将其中一个数据源切换为 H2。我仍然遇到同样的错误。
完整的源代码可用here
src/main/java/application.properties
#datasource
spring.datasource.username=test
spring.datasource.url=jdbc:mysql://localhost:3306/user_table
spring.datasource.password=test
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
##secondary Datasource
#spring.sec.datasource.username=test
#spring.sec.datasource.url=jdbc:mysql://localhost:3306/comp_table
#spring.sec.datasource.password=test
#spring.sec.datasource.driver-class-name=com.mysql.jdbc.Driver
#secondary Datasource
spring.sec.datasource.url=jdbc:h2:mem:AZ;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
spring.sec.datasource.driverClassName=org.h2.Driver
spring.sec.datasource.username=sa
spring.sec.datasource.password=
spring.sec.jpa.database-platform=org.hibernate.dialect.H2Dialect
src/main/java/com/company/foo/config/DBConfig.java
@Configuration
public class DBConfig {
@Bean(name="priDataSource")
@Primary
@ConfigurationProperties(prefix="spring.datasource")
public DataSource priDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "secDataSource")
@ConfigurationProperties(prefix="spring.sec.datasource")
public DataSource secDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "jdbcPriTemplate")
@Autowired
public JdbcTemplate jdbcPriTemplate(@Qualifier("priDataSource") DataSource hostds) {
return new JdbcTemplate(hostds);
}
@Bean(name = "jdbcSecTemplate")
@Autowired
public JdbcTemplate jdbcSecTemplate(@Qualifier("secDataSource") DataSource secDataSource) {
return new JdbcTemplate(secDataSource);
}
}
src/main/java/com/company/foo/Application.java
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
错误
2016-08-16 15:37:28.186 WARN 22600 --- [ main] ationConfigEmbeddedWebApplicationContext : 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/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: Unable to resolve persistence unit root URL
2016-08-16 15:37:28.192 INFO 22600 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
2016-08-16 15:37:28.212 INFO 22600 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report enable debug logging (start with --debug)
2016-08-16 15:37:28.240 ERROR 22600 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: Unable to resolve persistence unit root URL
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1076) ~[spring-context-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:851) ~[spring-context-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at com.company.foo.Application.main(Application.java:10) [classes!/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_102]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_102]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_102]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_102]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [sample-proj-1.0.0-SNAPSHOT.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [sample-proj-1.0.0-SNAPSHOT.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [sample-proj-1.0.0-SNAPSHOT.jar:na]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58) [sample-proj-1.0.0-SNAPSHOT.jar:na]
Caused by: javax.persistence.PersistenceException: Unable to resolve persistence unit root URL
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.determineDefaultPersistenceUnitRootUrl(DefaultPersistenceUnitManager.java:603) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos(DefaultPersistenceUnitManager.java:443) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet(DefaultPersistenceUnitManager.java:424) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:310) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:373) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:362) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
... 24 common frames omitted
Caused by: java.io.FileNotFoundException: class path resource [] cannot be resolved to URL because it does not exist
at org.springframework.core.io.ClassPathResource.getURL(ClassPathResource.java:187) ~[spring-core-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.determineDefaultPersistenceUnitRootUrl(DefaultPersistenceUnitManager.java:600) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
... 31 common frames omitted
错误说它在制作 EntityManagerFactory 时遇到问题，但您没有为每个数据源明确创建。如果您查看 Spring 多个数据源的数据示例，您可以看到它们如何概述创建不同的数据源。
https://github.com/spring-projects/spring-data-examples/tree/master/jpa/multiple-datasources
我在 Spring 引导应用程序中为 MySQL 使用了两个不同的 datasources。容器无法启动并出现以下错误。我还尝试将其中一个数据源切换为 H2。我仍然遇到同样的错误。
完整的源代码可用here
src/main/java/application.properties
#datasource
spring.datasource.username=test
spring.datasource.url=jdbc:mysql://localhost:3306/user_table
spring.datasource.password=test
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
##secondary Datasource
#spring.sec.datasource.username=test
#spring.sec.datasource.url=jdbc:mysql://localhost:3306/comp_table
#spring.sec.datasource.password=test
#spring.sec.datasource.driver-class-name=com.mysql.jdbc.Driver
#secondary Datasource
spring.sec.datasource.url=jdbc:h2:mem:AZ;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
spring.sec.datasource.driverClassName=org.h2.Driver
spring.sec.datasource.username=sa
spring.sec.datasource.password=
spring.sec.jpa.database-platform=org.hibernate.dialect.H2Dialect
src/main/java/com/company/foo/config/DBConfig.java
@Configuration
public class DBConfig {
@Bean(name="priDataSource")
@Primary
@ConfigurationProperties(prefix="spring.datasource")
public DataSource priDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "secDataSource")
@ConfigurationProperties(prefix="spring.sec.datasource")
public DataSource secDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "jdbcPriTemplate")
@Autowired
public JdbcTemplate jdbcPriTemplate(@Qualifier("priDataSource") DataSource hostds) {
return new JdbcTemplate(hostds);
}
@Bean(name = "jdbcSecTemplate")
@Autowired
public JdbcTemplate jdbcSecTemplate(@Qualifier("secDataSource") DataSource secDataSource) {
return new JdbcTemplate(secDataSource);
}
}
src/main/java/com/company/foo/Application.java
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
错误
2016-08-16 15:37:28.186 WARN 22600 --- [ main] ationConfigEmbeddedWebApplicationContext : 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/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: Unable to resolve persistence unit root URL
2016-08-16 15:37:28.192 INFO 22600 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
2016-08-16 15:37:28.212 INFO 22600 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report enable debug logging (start with --debug)
2016-08-16 15:37:28.240 ERROR 22600 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: Unable to resolve persistence unit root URL
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1076) ~[spring-context-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:851) ~[spring-context-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE]
at com.company.foo.Application.main(Application.java:10) [classes!/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_102]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_102]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_102]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_102]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [sample-proj-1.0.0-SNAPSHOT.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [sample-proj-1.0.0-SNAPSHOT.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [sample-proj-1.0.0-SNAPSHOT.jar:na]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58) [sample-proj-1.0.0-SNAPSHOT.jar:na]
Caused by: javax.persistence.PersistenceException: Unable to resolve persistence unit root URL
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.determineDefaultPersistenceUnitRootUrl(DefaultPersistenceUnitManager.java:603) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos(DefaultPersistenceUnitManager.java:443) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet(DefaultPersistenceUnitManager.java:424) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:310) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:373) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:362) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
... 24 common frames omitted
Caused by: java.io.FileNotFoundException: class path resource [] cannot be resolved to URL because it does not exist
at org.springframework.core.io.ClassPathResource.getURL(ClassPathResource.java:187) ~[spring-core-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.determineDefaultPersistenceUnitRootUrl(DefaultPersistenceUnitManager.java:600) ~[spring-orm-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
... 31 common frames omitted
错误说它在制作 EntityManagerFactory 时遇到问题，但您没有为每个数据源明确创建。如果您查看 Spring 多个数据源的数据示例，您可以看到它们如何概述创建不同的数据源。
https://github.com/spring-projects/spring-data-examples/tree/master/jpa/multiple-datasources