hibernate重连

<property name="url" value="jdbc:mysql://localhost/db?autoReconnect=true&autoReconnectForPools=true"/>

我的Hibernate是这样连接配置的，你试试，在Hibernate.cfg.xml文件中：

<hibernate-configuration>

<session-factory>

<!-- Database connection settings -->

<!--第一个为oracle的方言配置都一样-->

<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>

<property name="connection.url">jdbc:oracle:thin:@localhost:1521:数据库名</property>

<property name="connection.username">用户名</property>

<property name="connection.password">密码</property>

<property name="show_sql">true</property> <!--此语句为了再控制台显示对应的SQL语句-->

<mapping resource="com/set/test/Users.hbm.xml"/>

</session-factory>

</hibernate-configuration>

我在用Struts+Spring+Hibernate时遇到了Could not open Hibernate Session for transaction最后我解决了这个问题。我现在把问题贴在了下面！我最终确定是因为数据链接自动关闭，而不是spring和hibernate的问题。

解决办法是：

1.看看数据库的jdbc驱动是否支持重连

注意：mysql的重连autoReconnect参数不能使连接重连

2.寻找支持重连的连接池。

注意：c3p0连接池支持重连重连参数是:

idleConnectionTestPeriod 设置空闲连接测试周期

preferredTestQuery : 设置一查询语句，用于重连测试

testConnectionOnCheckin设置为true

testConnectionOnCheckout设置为true

javax.servlet.ServletException: Could not open Hibernate Session for transactionnested exception is org.hibernate.TransactionException: JDBC begin failed:

org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)

org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)

org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)

org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)

org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)

javax.servlet.http.HttpServlet.service(HttpServlet.java:709)

javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:78)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

com.p3g.common.SessionFilter.doFilter(SessionFilter.java:58)

root cause

org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transactionnested exception is org.hibernate.TransactionException: JDBC begin failed:

org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:524)

org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:322)

org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:255)

org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102)

org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)

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