c3p0数据连接池更换为druid

参考：

Druid 介绍及配置

http://www.cnblogs.com/niejunlei/p/5977895.html

配置_DruidDataSource参考配置

https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_DruidDataSource%E5%8F%82%E8%80%83%E9%85%8D%E7%BD%AE

阿里巴巴-德鲁伊druid连接池配置

http://blog.csdn.net/archer119/article/details/51771671

pom.xml文件中加入依赖

<!-- 连接池 --> 
<dependency> 
    <groupId>com.alibaba</groupId> 
    <artifactId>druid</artifactId> 
    <version>1.1.1</version> 
</dependency> 

修改spring中的连接池配置

web.xml中添加

	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">  
	    <!-- 数据库基本信息配置 -->
	    <property name="url" value="${url}" /> 
	    <property name="username" value="${user}" /> 
	    <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="${initialSize}" />
		<!-- 最小空闲连接数 -->
		<property name="minIdle" value="${minIdle}" />
		<!-- 配置获取连接等待超时的时间 -->
		<property name="maxWait" value="${maxWait}" />
		<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="${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}" />
		<!-- 打开removeAbandoned功能 -->
		<property name="removeAbandoned" value="${removeAbandoned}" />
		<!-- 1800秒，也就是30分钟 -->
		<property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}" />
		<!-- 关闭abanded连接时输出错误日志 -->
		<property name="logAbandoned" value="${logAbandoned}" />  
	</bean>

db-config.properties

url=jdbc:mysql://xx.xx.xx.xx:3306
user=
password=
driverClassName=com.mysql.jdbc.Driver
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中添加

   <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>  

配置修改完成

为Druid监控配置访问权限(配置访问监控信息的用户与密码)

http://blog.csdn.net/renfufei/article/details/39553639