Spring通过c3p0配置bean连接数据库

Spring通过c3p0配置bean连接数据库

Spring配置bean连接数据库两种方法：

（1）直接在.xml文件内部配置：

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xsi:schemaLocation="http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.3.xsd">

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xsi:schemaLocation="http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.3.xsd">

（2）将参数放在外部文件中，然后再读入配置文件：

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xsi:schemaLocation="http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.3.xsd">

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xsi:schemaLocation="http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.3.xsd">

外部的配置文件：

user=root

password=wangjian

driverclass=com.mysql.jdbc.Driver

jdbcurl=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false

测试函数：

package com.primary.spring.beans.properties;

import java.sql.SQLExceptEAWoiVKwNfion;

import javax.sql.DataSource;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

public static void main(String[] args) throws SQLException {

ApplicationContext ctx = new ClassPathXmlApplicationContext("beans-properties.xml");

DataSource dataSource = (DataSource) ctx.getBean("dataSource");

System.out.println(dataSource.getConnection());

}

}

测试结果：

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