上一講中，我們編寫的測試類如下所示：

package com.js.demo1;

import org.junit.Test;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

public class SpringTest1 {
	@Test
	public void demo1(){
		//建立連線池，這裡使用的是Spring自帶的連線池
		DriverManagerDataSource dataSource = new DriverManagerDataSource();
		//設定引數
		dataSource.setDriverClassName("com.mysql.jdbc.Driver");
		dataSource.setUrl("jdbc:mysql:///spring3_day02");
		dataSource.setUsername("root");
		dataSource.setPassword("root");
		
		//使用JDBC的模板，傳入DataSource，帶參構造器或者setter方法均可
		JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
		jdbcTemplate.execute("create table user (id int primary key auto_increment,name varchar(20))");
	}
}
 

1、Spring資料來源實現類 DriverManagerDataSource

2、DBCP資料來源 BasicDataSource 

3、C3P0資料來源 ComboPooledDataSource

重點掌握第3種，下面我們依次介紹。

對於預設連線池：

1、配置Spring預設連線池以及JDBC模板類

<?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.xsd">
<!-- 配置Spring預設連線池 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
	<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
	<property name="url" value="jdbc:mysql:///spring3_day02"></property>
	<property name="username" value="root"></property>
	<property name="password" value="root"></property>
</bean>
<!-- 定義JDBC的模板類 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
	<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>
 

package com.js.demo1;
/**
 * 預設連線池配置測試
 */
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringTest2 {
	@Autowired
	@Qualifier("jdbcTemplate")
	private JdbcTemplate jdbcTemplate;
	@Test
	public void demo2(){
		jdbcTemplate.execute("create table user2 (id int primary key auto_increment,name varchar(20))");
	}
}
 

執行測試，表格user2建立成功。

對於DBCP連線池：

1、預設連線池的使用無需匯入其他的jar包，但使用DBCP連線池需要匯入jar包：依賴包中org.apache.commons資料夾中：

（1）com.springsource.org.apache.commons.dbcp-1.2.2.osgi.jar

（2）com.springsource.org.apache.commons.pool-1.5.3.jar

2、配置DBCP連線池

<?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.xsd">
<!-- 配置DBCP連線池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
	<property name="url" value="jdbc:mysql:///spring3_day02"></property>
	<property name="username" value="root"></property>
	<property name="password" value="root"></property>
</bean>
<!-- 定義JDBC的模板類 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
	<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>

package com.js.demo1;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/**
 * DBCP連線池配置測試
 * @author JiangShuai
 *
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext2.xml")
public class SpringTest3 {
	@Autowired
	@Qualifier("jdbcTemplate")
	private JdbcTemplate jdbcTemplate;
	@Test
	public void demo2(){
		jdbcTemplate.execute("create table user3 (id int primary key auto_increment,name varchar(20))");
	}
}

對於C3P0連線池：

1、匯入jar包：依賴包中com.mchange.c3p0資料夾下com.springsource.com.mchange.v2.c3p0-0.9.1.2.jar

2、配置C3P0連線池：

<?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.xsd">
<!-- 配置C3P0連線池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
	<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
	<property name="jdbcUrl" value="jdbc:mysql:///spring3_day02"></property>
	<property name="user" value="root"></property>
	<property name="password" value="root"></property>
</bean>
<!-- 定義JDBC的模板類 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
	<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>

package com.js.demo1;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/**
 * C3P0連線池配置測試
 * @author JiangShuai
 *
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext3.xml")
public class SpringTest4 {
	@Autowired
	@Qualifier("jdbcTemplate")
	private JdbcTemplate jdbcTemplate;
	@Test
	public void demo2(){
		jdbcTemplate.execute("create table user4 (id int primary key auto_increment,name varchar(20))");
	}
}