休眠4 - 配置C3P0

我不会发布这个，除非我真的很沮丧。我试图在一个非常简单的应用程序中用Hibernate 4.1.1配置C3P0，但是我得到了一个没有发现异常的类。我在我的类路径中包含了C3P0特定的jar文件。休眠-c3p0-3.5.2-Final.jar休眠4 - 配置C3P0

hibernate.properties：

hibernate.connection.provider_class=org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider 
hibernate.c3p0.acquire_increment=1 
hibernate.c3p0.idle_test_period=180 
hibernate.c3p0.max_size=60 
hibernate.c3p0.max_statements=0 
hibernate.c3p0.min_size=10

堆栈跟踪：

28 Jul, 2012 9:23:08 PM org.hibernate.service.jdbc.connections.internal.ConnectionProviderInitiator instantiateExplicitConnectionProvider 
INFO: HHH000130: Instantiating explicit connection provider: org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider 
Exception in thread "main" org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.service.jdbc.connections.spi.ConnectionProvider] 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:186) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:150) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131) 
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:223) 
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:89) 
    at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131) 
    at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71) 
    at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2277) 
    at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2273) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1742) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1782) 
    at eko.test.hibernate.Hibernate4Test.main(Hibernate4Test.java:17) 
Caused by: org.hibernate.HibernateException: Could not instantiate connection provider [org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider] 
    at org.hibernate.service.jdbc.connections.internal.ConnectionProviderInitiator.instantiateExplicitConnectionProvider(ConnectionProviderInitiator.java:192) 
    at org.hibernate.service.jdbc.connections.internal.ConnectionProviderInitiator.initiateService(ConnectionProviderInitiator.java:114) 
    at org.hibernate.service.jdbc.connections.internal.ConnectionProviderInitiator.initiateService(ConnectionProviderInitiator.java:54) 
    at org.hibernate.service.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:69) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:176) 
    ... 13 more 
Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider] 
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:141) 
    at org.hibernate.service.jdbc.connections.internal.ConnectionProviderInitiator.instantiateExplicitConnectionProvider(ConnectionProviderInitiator.java:189) 
    ... 17 more 
Caused by: java.lang.ClassNotFoundException: Could not load requested class : org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider 
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl$1.findClass(ClassLoaderServiceImpl.java:99) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:321) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266) 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:264) 
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:138) 
    ... 18 more

来源

2012-07-28 VJune

包括你的JAR文件的版本3.5.2-final的，不包含您配置的类。为什么不使用版本为4.1.1的版本（因为这是您使用的Hibernate版本），并且里面有必要的类：http://grepcode.com/snapshot/repository.jboss.org/nexus/content/repositories/releases/org.hibernate/hibernate-c3p0/4.1.1.Final/

来源

2012-07-28 17:14:58

非常感谢。我不确定为什么这个jar文件不包含在我从网站下载的4.1.1 hibernate包中。 – VJune 2012-07-28 17:27:41

我只看了下载包，它们都包含hibernate-c3p0 jar。不知道你在看什么“hibernate bundle”... – 2012-07-28 18:30:28

休眠4 - 配置C3P0

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