啟動 tomcat 出現：
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [springcontext-config.xml]: Invocation of init method failed; nested exception is java.lang.NoSuchMethodError: org.logicalcobwebs.proxool.ConnectionPoolDefinition.setJmx(Z)V
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:187)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1213)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1053)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1018)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:566)
... 39 more
Caused by: java.lang.NoSuchMethodError: org.logicalcobwebs.proxool.ConnectionPoolDefinition.setJmx(Z)V
at org.logicalcobwebs.proxool.ProxoolDataSource.registerPool(ProxoolDataSource.java:133)
at org.logicalcobwebs.proxool.ProxoolDataSource.getConnection(ProxoolDataSource.java:94)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcServicesImpl.java:279)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:124)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1930)
at org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:372)
at org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:454)
at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:439)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
... 50 more
開始只有0.8.3， 出現ClassNotFound: ProxoolDataSource xxx
后面 去掉了0.8.3，加上了 0.9.0RC3，那個錯誤沒有了，又出現了新的錯誤。。。
真是奇怪啊！ 難道需要換回0.8 ？ 。。 可是， 我查找 這個方法也是存在的啊！
重新部署了， 還是一樣的啊！
D:\code\ws\spring.metadata.me_tcat\webapps\ktb2\WEB-INF\lib 一看， 竟然有多個 proxool 的jar ， 那個0.8 的還在！ 我明白了！
找那個的時候， 系統找到了0.9， 但是找那個方法的時候， 加載到了 0.8 的那個， 於是。。。
把D:\code\ws\spring.metadata.me_tcat\webapps\ktb2\WEB-INF\lib 下的 0.8 的jar 刪除就好了！
myeclipse 真是 坑爹！
為什么會這樣！！
其實之前也有研究過， myeclipse 的 redeploy 有三種方式， 分別是
默認就是 不刪除， 即使是沒用的jar —— classpath 中不存在的， 也有保留。 於是就發生這樣的悲劇。。。