struts+spring+hibernate+proxool配置

转自[url] http://wt8414.iteye.com/blog/242628 [/url]收藏参考
基于ssh的proxool连接池配置

环境:MyEclipse6.0,win xp,oracle,mysql

配置文件
1:applicationContext.xml

Xml代码

 

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"> 
<bean id="dataSource" 
class="org.springframework.jdbc.datasource.DriverManagerDataSource"><!-- 数据源类采用JDBC数据源 --> 
<property name="driverClassName"> 
<!-- 将数据库连接交给了proxool管理,使它的驱动 --> <value>org.logicalcobwebs.proxool.ProxoolDriver</value> 
</property> 
<property name="url"> 
                           <!-- 数据库连接池的别名,与你的proxool.xml中的Alias必须一致 --> 
<value>proxool.DbPool</value> 
</property> 
</bean> 
<bean id="sessionFactory" 
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
<property name="dataSource"> 
<ref bean="dataSource" /> 
</property> 
<property name="hibernateProperties"> 
<props> 
<prop key="hibernate.dialect"> 
org.hibernate.dialect.MySQLDialect 
</prop> 
<prop key="hibernate.connection.autocommit">true</prop> 
<prop key="hibernate.show_sql">true</prop> 
                                    <!-- 
此处要注意因为proxool自己释放数据库连接比慢,所以要在此给出释放连接的模式,具体几种模式对应的意思,可以Google一下hibernate.connection.release_mode,有很多说明,在此不多说 
--> 
<prop key="hibernate.connection.release_mode"> 
after_statement 
</prop> 
</props> 
</property> 
<property name="mappingResources"> 
<list> 
<value>cn/wt/vo/Admin.hbm.xml</value> 
<value>cn/wt/vo/User.hbm.xml</value> 
<value>cn/wt/vo/Workdate.hbm.xml</value> 
</list> 
</property> 
</bean> 
<bean id="hibernateTemplate" 
class="org.springframework.orm.hibernate3.HibernateTemplate"> 
<property name="sessionFactory"> 
<ref bean="sessionFactory" /> 
</property> 
</bean> 
<bean id="adminDao" class="cn.wt.dao.AdminDao" abstract="true" /> 
<bean id="adminDaoImpl" class="cn.wt.dao.impl.AdminDaoImpl" 
parent="adminDao"> 
<property name="hibernateTemplate"> 
<ref bean="hibernateTemplate" /> 
</property> 
</bean> 
<bean id="workDateDao" class="cn.wt.dao.WorkDateDao" 
abstract="true" /> 
<bean id="workDateDaoImpl" class="cn.wt.dao.impl.WorkDateDaoImpl" 
parent="workDateDao"> 
<property name="hibernateTemplate"> 
<ref bean="hibernateTemplate" /> 
</property> 
</bean> 
<bean id="userDao" class="cn.wt.dao.UserDao" abstract="true" /> 
<bean id="userDaoImpl" class="cn.wt.dao.impl.UserDaoImpl" parent="userDao"> 
<property name="hibernateTemplate"> 
<ref bean="hibernateTemplate"/> 
</property> 
</bean> 
<bean name="/adminAction" class="cn.wt.struts.action.AdminAction"> 
<property name="adminDao"> 
<ref bean="adminDaoImpl" /> 
</property> 
</bean> 
<bean name="/workdateAction" 
class="cn.wt.struts.action.WorkdateAction"> 
<property name="workDateDao"> 
<ref bean="workDateDaoImpl" /> 
</property> 
<property name="userDao"> 
<ref bean="userDaoImpl"/> 
</property> 
</bean> 
</beans> 

配置文件
2:/WEB-INF/proxool.xml

<?xml version="1.0" encoding="iso-8859-1"?>  
<!-- the proxool configuration can be embedded within your own application's.   
Anything outside the "proxool" tag is ignored. -->  
<something-else-entirely>  
    <proxool>  
        <alias>DbPool</alias> //与applicationContext.xml中url一致   
        <driver-url>jdbc:mysql://localhost:3306/mysql</driver-url>  
        <driver-class>com.mysql.jdbc.Driver</driver-class>  
        <driver-properties>  
            <property name="user" value="root" />  
            <property name="password" value="123" />  
            <property name="useUnicode" value="true" />  
            <property name="characterEncoding" value="GBK" />  
        </driver-properties>  
        <minimum-connection-count>5</minimum-connection-count>  
        <maximum-connection-count>50</maximum-connection-count>  
        <maximum-active-time>60000</maximum-active-time>  
        <house-keeping-test-sql>select 1</house-keeping-test-sql>  
        <prototype-count>5</prototype-count>  
        <house-keeping-sleep-time>60000</house-keeping-sleep-time>  
    </proxool>  
</something-else-entirely> 

配置文件
3:web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4"  
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  
    <context-param>  
        <param-name>contextConfigLocation</param-name>  
        <param-value>  
            /WEB-INF/classes/applicationContext.xml   
        </param-value>  
    </context-param>  
    <servlet>  
        <servlet-name>proxoolServletConfigurator</servlet-name>  
        <servlet-class>  
            org.logicalcobwebs.proxool.configuration.ServletConfigurator   
        </servlet-class>  
        <init-param>  
            <param-name>xmlFile</param-name>  
            <param-value>/WEB-INF/proxool.xml</param-value>  
        </init-param>  
                  <!-- 由于proxool要先加载,所以启动优先级要比spring高,否则在spring加载时会报错 -->  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <servlet>  
    <servlet-name>context</servlet-name>  
    <servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class>  
    <load-on-startup>2</load-on-startup>  
  </servlet>  
  <servlet>  
           <!-- 数据库连接监控器 -->  
      <servlet-name>proxoolAdmin</servlet-name>  
      <servlet-class>org.logicalcobwebs.proxool.admin.servlet.AdminServlet</servlet-class>  
    </servlet>  
    <servlet-mapping>  
        <servlet-name>proxoolAdmin</servlet-name>  
        <url-pattern>/proxoolAdmin</url-pattern>  
    </servlet-mapping>  
    <servlet>  
        <servlet-name>action</servlet-name>  
        <servlet-class>  
            org.apache.struts.action.ActionServlet   
        </servlet-class>  
        <init-param>  
            <param-name>config</param-name>  
            <param-value>/WEB-INF/struts-config.xml</param-value>  
        </init-param>  
        <init-param>  
            <param-name>debug</param-name>  
            <param-value>3</param-value>  
        </init-param>  
        <init-param>  
            <param-name>detail</param-name>  
            <param-value>3</param-value>  
        </init-param>  
        <load-on-startup>0</load-on-startup>  
    </servlet>  
    <servlet-mapping>  
        <servlet-name>action</servlet-name>  
        <url-pattern>*.do</url-pattern>  
    </servlet-mapping>  
    <welcome-file-list>  
        <welcome-file>index.jsp</welcome-file>  
    </welcome-file-list>  
</web-app>

基本配置就这些,以前在根据网上所说的很多利用spring直接管理proxool的方法来实现,这种方法也可以,但有几点问题,1.mysql连接的URL:jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=GBK中间的&符号,在xml中使用&来代替,但我在做测试时发现这样做不行,spring在启动时会报没有这样的驱动,还有些根本就是错误的估计是在网上转来转去,没经过测试就发表的.
关于连接释放,在applicationContext.xml中绝对有必要增加hibernate.connection.release_mode这一参数,而且比较的好的设置应该是after_statement,另一种是after_transaction,而使用after_statement优于after_transaction原因是避免了在一个事务结束后连接就释放,大家可以试一下先将这个参数去掉,运几次数据库操作,会发现产了生很多连接没有释放,大概大30秒至15秒之间可以释放有时会更长,然后在加上这个参数测试.