hibernate与mysql连接超时的解决方法

用c3p0代替hibernate的连接池。c3p0.9.1.jar可从hibernate开源项目的lib下面找到，将其拷贝到web-inf/lib下面。在hibernate.cfg.xml配置文件中添加以下信息：
<property name="hibernate.cache.provider_class">
org.hibernate.cache.NoCacheProvider
</property>
<property name="hibernate.connection.provider_class">
org.hibernate.connection.C3P0ConnectionProvider
</property>
<property name="hibernate.c3p0.min_size">2</property>
<property name="hibernate.c3p0.timeout">（小于28800）</property>
<property name="hibernate.c3p0.max_statements">100</property>
<property name="hibernate.c3p0.idle_test_period">（小于28800）</property>
<property name="hibernate.c3p0.acquire_increment">2</property>
<property name="hibernate.c3p0.validate">false</property>
<property name="transaction.auto_close_session"></property>