servlet整合druid

druid.properties文件

#druid配置文件
#驱动
driverClassName=com.mysql.jdbc.Driver
#url
url=jdbc:mysql://127.0.0.1:3306/cms?useUnicode=true&characterEncoding=utf8&useSSL=true
#用户名
username=root
#密码
password=root
#连接池初始化大小
initialSize=10
#活动链接
maxActive=10
#最小连接数
minIdle=10
#使用的内置过滤器  若不配置 则不会统计SQL执行
filters=stat

DruidUtil.java

package com.mrt.util;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidDataSourceFactory;

/**
 * Druid连接池
 * @author tangpengfei
 */
public class DruidUtil {
    
    static DruidDataSource dataSource;
    
    static {
        Properties prop = new Properties();
        try {
            prop.load(DruidUtil.class.getClassLoader().getResourceAsStream("druid.properties"));
            dataSource = (DruidDataSource)DruidDataSourceFactory.createDataSource(prop);
            //dataSource.addFilters("stat,log4j,wall");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static Connection getConn() {
        try {
            return dataSource.getConnection();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }
}

web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>servlet_druid</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
    <servlet-name>StatViewServlet</servlet-name>
    <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
    <init-param>  
    <!-- 允许清空统计数据 -->  
    <param-name>resetEnable</param-name>  
    <param-value>true</param-value>  
    </init-param>  
    <init-param>  
    <!-- 用户名 -->  
    <param-name>loginUsername</param-name>  
    <param-value>admin</param-value>  
    </init-param>  
    <init-param>  
    <!-- 密码 -->  
    <param-name>loginPassword</param-name>  
    <param-value>admin</param-value>  
    </init-param>  
  </servlet>
  
  <servlet-mapping>
    <servlet-name>StatViewServlet</servlet-name>
    <url-pattern>/druid/*</url-pattern>
  </servlet-mapping>
  
</web-app>