spring配置dataSource:druid數據庫鏈接池

    使用阿里巴巴開源的Druid配置數據庫鏈接池。在這一樣記錄下測試配置過程。整體來講,druid的配置文件和dbcp是很是相似的。java

    項目部分引用jar的maven配置:mysql

<!-- druid -->
    <dependency>
    	<groupId>commons-pool</groupId>
    	<artifactId>commons-pool</artifactId>
    	<version>1.6</version>
	</dependency>
    <dependency>
    	<groupId>com.alibaba</groupId>
    	<artifactId>druid</artifactId>
    	<version>1.1.6</version>
	</dependency>
    <dependency>
    	<groupId>org.springframework</groupId>
    	<artifactId>spring-jdbc</artifactId>
    	<version>4.0.0.RELEASE</version>
	</dependency>
    <dependency>
   		<groupId>mysql</groupId>
    	<artifactId>mysql-connector-java</artifactId>
    	<version>5.1.38</version>
	</dependency>

一、新建簡單spring項目。spring

項目目錄說明:sql

druidTestfileBeans.xml: spring應用上下文。數據庫

jdbc.properties:druid數據庫鏈接池配置文件。緩存

UserDao.java:DAO層bean。bash

MainDruid.java:測試類。oracle

測試用數據庫表及表數據以下:maven

二、代碼性能

jdbc.properties:

#數據庫驅動
jdbc.driverClassName=com.mysql.jdbc.Driver
#數據庫
jdbc.url=jdbc:mysql://172.21.4.45:3307/cdspdb?useUnicode=true&amp;characterEncoding=utf-8
#用戶名
jdbc.username=cdsp
#密碼
jdbc.password=cdsp
#別名方式,擴展插件,監控統計用的filter:stat,日誌用的filter:log4j,防護sql注入的filter:wall
jdbc.filters=stat 
#最大鏈接數
jdbc.maxActive=300
#初始化鏈接數
jdbc.initialSize=2
#獲取鏈接最大等待時間
jdbc.maxWait=60000
#最小鏈接數
jdbc.minIdle=1
#檢測鏈接有效性的時間間隔
jdbc.timeBetweenEvictionRunsMillis=60000
#鏈接保持空閒而不被驅逐的最長時間
jdbc.minEvictableIdleTimeMillis=300000
#鏈接有效性,檢測sql
jdbc.validationQuery=SELECT 'x'
#定時檢測空閒鏈接有效性
jdbc.testWhileIdle=true
#檢測獲取的鏈接的有效性
jdbc.testOnBorrow=false
#檢測要歸還的鏈接的有效性
jdbc.testOnReturn=false
#是否緩存preparedStatement,即PSCache。PSCache對支持遊標的數據庫性能提高巨大,好比說oracle。在mysql下建議關閉。
jdbc.poolPreparedStatements=false
jdbc.maxPoolPreparedStatementPerConnectionSize=50

druidTestfileBeans.xml:

<?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:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans.xsd
	http://www.springframework.org/schema/aop
	http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
	http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    <!-- jdbc配置文件 -->
	<context:property-placeholder location="com/springtest/druid/jdbc.properties" />
	<!-- 配置dbcp數據源鏈接池 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">   
    	<property name="url" value="${jdbc.url}" />  
    	<property name="username" value="${jdbc.username}" />  
    	<property name="password" value="${jdbc.password}" />    
    	<property name="filters" value="${jdbc.filters}" />  
    	<property name="maxActive" value="${jdbc.maxActive}" />  
    	<property name="initialSize" value="${jdbc.initialSize}" />  
    	<property name="maxWait" value="${jdbc.maxWait}" />  
    	<property name="minIdle" value="${jdbc.minIdle}" />  
    	<property name="timeBetweenEvictionRunsMillis" value="${jdbc.timeBetweenEvictionRunsMillis}" />  
    	<property name="minEvictableIdleTimeMillis" value="${jdbc.minEvictableIdleTimeMillis}" />  
   		<property name="validationQuery" value="${jdbc.validationQuery}" />  
    	<property name="testWhileIdle" value="${jdbc.testWhileIdle}" />  
    	<property name="testOnBorrow" value="${jdbc.testOnBorrow}" />  
    	<property name="testOnReturn" value="${jdbc.testOnReturn}" />  
    	<property name="poolPreparedStatements" value="${jdbc.poolPreparedStatements}" />  
    	<property name="maxPoolPreparedStatementPerConnectionSize" value="${jdbc.maxPoolPreparedStatementPerConnectionSize}" />  
	</bean> 
		
	<!-- 引入spingjdbc -->
	<bean id="JdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="dataSource"></property>
	</bean>
	<bean id="UserDao" class="com.springtest.dbcp.UserDao">
		<property name="jdbcTemplate" ref="JdbcTemplate"></property>
	</bean>
</beans>

UserDao.java:

package com.springtest.druid;

import java.util.List;
import java.util.Map;

import javax.annotation.Resource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

public class UserDao {
	
	JdbcTemplate jdbcTemplate;
	
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {  
        this.jdbcTemplate = jdbcTemplate;  
    } 
	public List<Map<String,Object>> queryByName(String name)
	{
		String sql = "select * from thnb_user where user_name='" + name + "' ";
		List<Map<String,Object>> list = jdbcTemplate.queryForList(sql);
		return list;
	}
}

MainDruid.java:

package com.springtest.druid;

import java.util.List;
import java.util.Map;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.springtest.dbcp.UserDao;

public class MainDruid {

	public static void main(String[] args) {
		String contextXmlPath2 = "com/springtest/druid/druidTestfileBeans.xml";
		ApplicationContext ctx = new ClassPathXmlApplicationContext(contextXmlPath2);
		UserDao userDao = (UserDao) ctx.getBean("UserDao");
		List<Map<String,Object>> list = userDao.queryByName("thb");
		System.out.println(list);
	}

}

四、測試驗證

    執行MainDruid.java,打印以下:

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