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Hibernate的三种连接池设置C3P0、dbcp和Proxool
<!-- JDBC驱动程序 -->
<property name="connection.driver_class">org.gjt.mm.mysql.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/struts?useUnicode=true&characterEncoding=GBK</property&g ...
CachedConnectionManager] Closing a connection for you. Please close them yourself: org.jboss.resource.adapter.jdbc.jdk5.WrappedConnectionJDK5@c75442
java.lang.Throwable: STACKTRACE
at org.jboss.resource.connectionmanager.CachedConnectionManager.registerConnection(CachedConnectionManager.java:290)
...
1.如果是用myeclipse 的database Driver来连接的话，将MyEclipse中eclipse目录下的eclipse.ini文件，把Duser.language=en 改成 Duser.language=zh就行了.
2.防火墙拦接
3.数据库服务品监听未开启
4 地址错误 eg:
IP-- jdbc:oracle:thin:@192.168.1.22:1521:ORCL
包-- ojdbc14
驱动-- oracle.jdbc.driver.OracleDriver