阿里巴巴 druid

1.jar获取

　　可以从 http://repo1.maven.org/maven2/com/alibaba/druid/ 下载最新的jar包。如果想使用最新的源码编译，也可以从 https://github.com/alibaba/druid 下载源码，然后使用maven命令行，或者导入到IDEA中进行编译获得。

2.druid的配置项详解

3.配置示例

　　spring.xml文件中加入：

< bean name = "transactionManager" class ="org.springframework.jdbc.datasource.DataSourceTransactionManager" >   
   　　< property name = "dataSource" ref = "dataSource" ></ property >
　　</ bean >

    < bean id = "propertyConfigurer" class ="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >  
       < property name = "locations" >  
           < list >  
                 < value > /WEB-INF/classes/dbconfig.properties </ value >  
            </ list >  
        </ property >  
    </ bean >

    <!-- 阿里 druid 数据库连接池 -->
    < bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource"destroy-method = "close" >  
         <!-- 数据库基本信息配置 -->
         < property name = "url" value = "${url}" />  
         < property name = "username" value = "${username}" />  
         < property name = "password" value = "${password}" />  
         < property name = "driverClassName" value = "${driverClassName}" />  
         < property name = "filters" value = "${filters}" />  

          <!-- 最大并发连接数 -->
         < property name = "maxActive" value = "${maxActive}" />

         <!-- 初始化连接数量 -->
         < property name = "initialSize" value = "${initialSize}" />

         <!-- 配置获取连接等待超时的时间 -->
         < property name = "maxWait" value = "${maxWait}" />

         <!-- 最小空闲连接数 -->
         < property name = "minIdle" value = "${minIdle}" />  

          <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
         < property name = "timeBetweenEvictionRunsMillis" value ="${timeBetweenEvictionRunsMillis}" />

         <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
         < property name = "minEvictableIdleTimeMillis" value ="${minEvictableIdleTimeMillis}" />  

         < property name = "validationQuery" value = "${validationQuery}" />  
         < property name = "testWhileIdle" value = "${testWhileIdle}" />  
         < property name = "testOnBorrow" value = "${testOnBorrow}" />  
         < property name = "testOnReturn" value = "${testOnReturn}" />  
         < property name = "maxOpenPreparedStatements" value ="${maxOpenPreparedStatements}" />

　dbconfig.properties

url=jdbc:mysql://localhost:3306/newm

driverClassName=com.mysql.jdbc.Driver

username=root

password=root

filters=stat

maxActive=20

initialSize=1

maxWait=60000

minIdle=10

maxIdle=15

timeBetweenEvictionRunsMillis=60000

minEvictableIdleTimeMillis=300000

validationQuery=SELECT 'x'

testWhileIdle=true

testOnBorrow=false

testOnReturn=false

maxOpenPreparedStatements=20

removeAbandoned=true

removeAbandonedTimeout=1800

logAbandoned=true

　web.xml

<!-- 连接池 启用 Web 监控统计功能    start-->
    < filter >
       < filter-name > DruidWebStatFilter </ filter-name >
       < filter-class > com.alibaba.druid.support.http.WebStatFilter </ filter-class >
       < init-param >
           < param-name > exclusions </ param-name >
           < param-value > *. js ,*. gif ,*. jpg ,*. png ,*. css ,*. ico ,/ druid /* </ param-value >
       </ init-param >
    </ filter >

    < filter-mapping >
       < filter-name > DruidWebStatFilter </ filter-name >
       < url-pattern > /* </ url-pattern >
    </ filter-mapping >

    < servlet >
       < servlet-name > DruidStatView </ servlet-name >
       < servlet-class > com.alibaba.druid.support.http.StatViewServlet </ servlet-class >
    </ servlet >

    < servlet-mapping >
       < servlet-name > DruidStatView </ servlet-name >
       < url-pattern > / druid /* </ url-pattern >
    </ servlet-mapping >
    <!-- 连接池 启用 Web 监控统计功能    end-->

转自：http://www.cnblogs.com/hafiz/p/5879356.html