使用Hibernate遇到的坑

最新推荐文章于 2022-01-19 22:43:43 发布

原创最新推荐文章于 2022-01-19 22:43:43 发布 · 5.6k 阅读

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在使用Hibernate时遇到了配置问题，包括EhCacheRegionFactory无法实例化导致的ServiceException和C3P0配置错误。错误表现为ExceptionInInitializerError，跟踪堆栈显示与jar包版本不匹配和策略选择异常有关。解决办法是检查hibernate.properties配置文件，确保region.factory_class属性正确，并且验证所使用的jar包版本与Hibernate版本兼容。

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3.2：

maven配置：

<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.9</version>
			<scope>test</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>4.3.11.Final</version>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.39</version>
		</dependency>
		
		<dependency>
		    <groupId>org.hibernate</groupId>
		    <artifactId>hibernate-c3p0</artifactId>
		    <version>4.3.11.Final</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-ehcache -->
		<dependency>
		    <groupId>org.hibernate</groupId>
		    <artifactId>hibernate-ehcache</artifactId>
		    <version>4.3.11.Final</version>
		</dependency>
		
		

	</dependencies>

今天在使用Hibernate二级缓存，应用插件EHCache缓存，出现了一下错误

java.lang.ExceptionInInitializerError
at day02test.day02test.init(day02test.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.cache.spi.RegionFactory]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:261)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:225)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:295)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2444)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2440)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857)
at day28.HibernateUtil.<clinit>(HibernateUtil.java:15)
... 24 more
Caused by: org.hibernate.HibernateException: could not instantiate RegionFactory [org.hibernate.cache.internal.EhCacheRegionFactory]
at org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactoryInitiator.java:101)
at org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactoryInitiator.java:46)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:105)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:251)
... 31 more
Caused by: org.hibernate.boot.registry.selector.spi.StrategySelectionException: Unable to resolve name [org.hibernate.cache.internal.EhCacheRegionFactory] as strategy [org.hibernate.cache.spi.RegionFactory]
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.selectStrategyImplementor(StrategySelectorImpl.java:128)
at org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactoryInitiator.java:87)
... 34 more

解决办法是：我给出我的配置

<property name="hibernate.cache.use_second_level_cache">true</property>
<property name="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>

下面给出hibernate>project>etc>hibernate.properties的配置

#hibernate.cache.region.factory_class org.hibernate.cache.internal.EhCacheRegionFactory

按它的配置就会出现上面的异常，这已经无关jar包版本的问题了

3.1：配置C3P0出错

同样也是出现上面类似的异常错误，但是我这次用EHCache出错的解决办法，但是没用，后来发现原来是jar包版本不对

目前总结：1.版本要对应 2.解决问题首先看官方给出的properties文件，其次再微调

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