最新的 Hibernate 和 Derby：无法建立 JDBC 连接

Question

我正在尝试创建一个使用 Hibernate 连接到 Derby 数据库的准系统项目。我使用的是 Hibernate 和 Derby 的最新版本，但出现一般性 Unable to make JDBC Connection 错误。

这是我的 pom.xml 文件：

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>StaticVoidGames</groupId>
    <artifactId>DatabaseTest</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>DatabaseTest</name>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.0.6.Final</version>
        </dependency>

        <dependency>
            <groupId>org.apache.derby</groupId>
            <artifactId>derby</artifactId>
            <version>10.12.1.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.derby</groupId>
            <artifactId>derbyclient</artifactId>
            <version>10.12.1.1</version>
        </dependency>

        <dependency>
            <groupId>javax.transaction</groupId>
            <artifactId>jta</artifactId>
            <version>1.1</version>
        </dependency>

    </dependencies>
</project>

这是我的 hibernate-derby-cfg.xml 文件：

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <property name="connection.driver_class">org.apache.derby.jdbc.ClientDriver</property>

        <property name="connection.url">jdbc:derby:TestDerbyDB;create=true</property>
        <property name="connection.username"></property>
        <property name="connection.password"></property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.DerbyDialect</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <property name="hbm2ddl.auto">update</property>
    </session-factory>
</hibernate-configuration>

这是我的 barbones 代码：

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class DatabaseTestMain {
    public static void main(String... args){
        Configuration derbyConfiguration = new Configuration().configure("hibernate-derby.cfg.xml");

        SessionFactory derbySF = derbyConfiguration.buildSessionFactory();
        Session derbySession = derbySF.openSession();

        derbySession.close();
    }
}

当我运行那个时，我得到这个堆栈跟踪：

Exception in thread "main" org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:244)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:208)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189)
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:51)
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:217)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189)
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.handleTypes(MetadataBuildingProcess.java:352)
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:111)
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:83)
    at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:418)
    at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:87)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:692)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
    at DatabaseTestMain.main(DatabaseTestMain.java:9)
Caused by: org.hibernate.HibernateException: Unable to make JDBC Connection [jdbc:derby:TestDerbyDB;create=true]
    at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:60)
    at org.hibernate.engine.jdbc.connections.internal.PooledConnections.addConnections(PooledConnections.java:106)
    at org.hibernate.engine.jdbc.connections.internal.PooledConnections.<init>(PooledConnections.java:40)
    at org.hibernate.engine.jdbc.connections.internal.PooledConnections.<init>(PooledConnections.java:19)
    at org.hibernate.engine.jdbc.connections.internal.PooledConnections$Builder.build(PooledConnections.java:138)
    at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.buildPool(DriverManagerConnectionProviderImpl.java:110)
    at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:74)
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:217)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189)
    at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:145)
    at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66)
    at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:88)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:234)

我已经尝试更改我的 sql 方言以使用 Derby 10.7:

<property name="dialect">org.hibernate.dialect.DerbyTenSevenDialect</property>

而且我已经尝试更改我的 pom.xml 以使用 Derby 10.7:

<dependency>
    <groupId>org.apache.derby</groupId>
    <artifactId>derby</artifactId>
    <version>10.7.1.1</version>
</dependency>

<dependency>
    <groupId>org.apache.derby</groupId>
    <artifactId>derbyclient</artifactId>
    <version>10.7.1.1</version>
</dependency>

但是无论我做什么，我仍然会得到上面的错误。我错过了什么吗？

我在从 Hibernate 4.0.1 升级到 Hibernate 4.3.5 时询问了 this question 同样的问题。关于我的类路径来自哪里，升级到更新版本等有几个问题。所以我尝试从一个全新的项目开始，所有的都是最新版本，但我仍然遇到错误。

编辑： 我应该注意到，所有这些设置在 Hibernate 4.0.1 中都运行良好，并且 Derby 数据库不需要用户名或密码。

Answer 1

您正在使用 ClientDriver 连接到本地数据库。最近的德比文档（在撰写本文时）说

The class that loads Derby's local JDBC driver is the class org.apache.derby.jdbc.EmbeddedDriver. The class that loads Derby's network client driver is the class org.apache.derby.jdbc.ClientDriver.

请参考https://db.apache.org/derby/docs/10.9/ref/rrefjdbc32052.html

因此，为了让您的代码运行，如果您不想做太多更改，我建议您 EmbeddedDriver。如果您仍然必须使用 ClientDriver，那么您将必须 run the network service instance 将连接 URL 更改为 jdbc:derby://localhost:1527/MyDbTest;create=true 之类的内容，并且您 必须必须为 ClientDriver 提供用户名和密码。

最新的 Hibernate 和 Derby：无法建立 JDBC 连接

Latest Hibernate and Derby: Unable to make JDBC Connection

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