SSH项目中出现数据库链接断开

在SSH项目中,当项目在8个小时没有人用的情况下就会出现如下错误:
java.net.SocketException
MESSAGE: Broken pipe

STACKTRACE:

java.net.SocketException: Broken pipe
原因是mysql里面默认是数据库链接在8小时没有用的时候就会失效。
解决方法:
把hibernate的连接池换成c3p0连接池。具体操作如下:
在applicationContext-*.xml中
<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:aop="http://www.springframework.org/schema/aop"
     xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
<!--数据库属性配置 -->
<bean id="hibernateProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="properties">
<props>
    <prop key="hibernate.hbm2ddl.auto">update</prop>
    <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
    <prop key="hibernate.query.substitutions">true 'Y', false 'N'</prop>
    <prop key="hibernate.show_sql">false</prop>
    <prop key="hibernate.c3p0.timeout">1800</prop>
    <prop key="hibernate.c3p0.max_statement">50</prop>
    </props>
</property>
</bean>

<bean id="dataSource"
class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass"
value="com.mysql.jdbc.Driver">
</property>
<property name="jdbcUrl" value="jdbc:mysql://localhost/xsdData?useUnicode=true&amp;characterEncoding=utf-8">
</property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>

<!-- 连接池中保留的最小连接数。-->
<property name="minPoolSize">
<value>5</value>
</property>
<!-- 连接池中保留的最大连接数。Default: 15  -->
<property name="maxPoolSize">
<value>30</value>
</property>
<!-- 最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0-->
<property name="maxIdleTime">
<value>25000</value>
</property>
<!-- 当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
<property name="acquireIncrement">
<value>5</value>
</property>
<property name="maxStatements">
<value>1000</value>
</property>
<!-- 初始化时获取的连接数,取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
<property name="initialPoolSize">
<value>10</value>
</property>
<property name="idleConnectionTestPeriod">
<value>18000</value>
</property>
<property name="acquireRetryAttempts">
<value>30</value>
</property>
<property name="breakAfterAcquireFailure">
<value>true</value>
</property>
<property name="testConnectionOnCheckin">
<value>true</value>
</property>
<property name="testConnectionOnCheckout">
<value>true</value>
</property>
<property name="checkoutTimeout">
<value>30000</value>
</property>
<property name="automaticTestTable">
<value>C3P0TestTable</value>
</property>
</bean>
<!-- 配置sessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="/WEB-INF/hibernate.cfg.xml" />
<property name="hibernateProperties" ref="hibernateProperties"/>
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>

</beans>

注:记得引入c3p0-0.9.0.jar这个包

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