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();
     }
 }