Spring之c3p0连接池xml配置和使用举例

1、导入jar包

         c3p0-0.9.5.2.jar

         mchange-commons-java-0.2.11.jar

2、源码：

beans.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:contexnt="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-2.5.xsd">

    <!--配置c3p0连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--注入属性-->
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://10.15.1.200:3306/gxrdb"></property>
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
    </bean>

    <!--创建service对象，注入dao对象-->
    <bean id="userSerivce" class="helloworld.c3p0.UserSerivce">
        <property name="userDao" ref="userDao"></property>
    </bean>

    <!--创建DAO对象，注入JdbcTemplate对象-->
    <bean id="userDao" class="helloworld.c3p0.UserDao">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>

    <!--创建JdbcTemplate对象，注入连接池dataSource-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

</beans>

 UserSerivce.java

package helloworld.c3p0;

public class UserSerivce {
    private UserDao userDao;

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    public void add(){
        userDao.add();
    }
}

UserDao.java

package helloworld.c3p0;

import org.springframework.jdbc.core.JdbcTemplate;

public class UserDao {

    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    //    实现添加操作
    public void add(){
        // 调用jdbcTemplate对象中的方法实现操作
        String sql = "insert into user value(?,?,?)";
        // 表结构：id（int、自增）,name(varchar 100),age(int 10)
        int rows = jdbcTemplate.update(sql, null, "Tom3", 35);
        System.out.println("插入行数：" + rows);
    }
}

TestC3p0.java

package helloworld.c3p0;

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

public class TestC3p0 {
    public static void main(String[] args) {
        ApplicationContext context =
                new ClassPathXmlApplicationContext("beans_c3p0.xml");
        UserSerivce userSerivce = (UserSerivce) context.getBean("userSerivce");
        userSerivce.add();
    }
}