您的位置:首页 > 编程语言 > Java开发

Spring通过c3p0配置bean连接数据库

2019-08-21 11:14 411 查看

Spring配置bean连接数据库两种方法:

(1)直接在.xml文件内部配置:

<?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">

<!-- 配置链接数据库 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="root"></property>
<property name="password" value="wangjian"></property>
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false"></property>
</bean>

</beans>

(2)将参数放在外部文件中,然后再读入配置文件:

<?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">

<!-- 导入属性文件 -->

<context:property-placeholder location="classpath:db.properties" />
<!-- 使用外部化属性文件的属性 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="${user}"></property>
<property name="password" value="${password}"></property>
<property name="driverClass" value="${driverclass}"></property>
<property name="jdbcUrl" value="${jdbcurl}"></property>
</bean>

</beans>

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.SQLException;

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:

以上就是本文的全部内容,希望对大家的学习有所帮助

您可能感兴趣的文章:

内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签:  Spring c3p0 bean 数据库
相关文章推荐