package cn.itcast.spring3.demo1;import java.sql.DriverManager;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.jdbc.datasource.DriverManagerDataSource;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.jta.SpringJtaSynchronizationAdapter;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringTest1 {@Autowired@Qualifier("jdbcTemplate")private JdbcTemplate jdbcTemplate;//注入Jdbc模板
    @Testpublic void demo2(){jdbcTemplate.execute("create table user (id int primary key auto_increment,name varchar(20))");}@Testpublic void demo1(){// 创建连接池:DriverManagerDataSource dataSource = new DriverManagerDataSource();//Spring自带的连接池// 设置参数:dataSource.setDriverClassName("com.mysql.jdbc.Driver");dataSource.setUrl("jdbc:mysql:///spring3_day02");dataSource.setUsername("root");dataSource.setPassword("");//使用JDBC的模板://JdbcTemplate jdbcTemplate = new JdbcTemplate();//jdbcTemplate.setDataSource(dataSource);JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);jdbcTemplate.execute("create table user (id int primary key auto_increment,name varchar(20))");}
}

<?xml version="1.0" encoding="UTF-8"?>
<!-- 引入beans的头 -->
<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默认的连接池 --><!-- 这个类由Spring来帮我们创建,它默认情况下只创建一次,因为是单例的. --><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=""></property></bean><!-- 配置DBCP连接池 --><bean id="dataSource1" 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=""></property></bean><!-- 定义jdbctemplate --><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"><property name="dataSource" ref="dataSource1"></property><!-- 把上面定义好的连接池注入进来了 --></bean>
</beans>