spring(4)数据库连接

jdbc.properties

user=root
password=root
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/test
initialSize=5
maxActive=10

 

<?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: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/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
    
    <!-- 加載配置文件 -->
    <context:property-placeholder
        location="classpath:jdbc.properties" />

    <bean id="dataSource"
        class="com.alibaba.druid.pool.DruidDataSource">
        <property name="username" value="${user}" />
        <property name="password" value="${password}" />
        <property name="driverClassName" value="${driverClassName}" />
        <property name="url" value="${url}" />
        <property name="initialSize" value="${initialSize}" />
        <property name="maxActive" value="${maxActive}" />
</bean>
</beans>

package com.cn.test;

import javax.sql.DataSource;

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

public class DataSourceTest {
    @Test
    public void test1() throws Exception {
        
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        
        DataSource dataSource = (DataSource) applicationContext.getBean("dataSource");
        
        System.out.println( dataSource.getConnection() );
        
    }
}