package cn.itcast.c3p0;
import org.springframework.jdbc.core.JdbcTemplate;
public class UserDao {
//得到JdbcTemplate对象
private JdbcTemplate jdbcTemplate;
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
//添加操作
public void add() {
//创建jdbcTemplate对象
// JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
String sql = "insert into user values(?,?)";
jdbcTemplate.update(sql, "李雷","520");
}
}
package cn.itcast.c3p0;
public class UserService {
private UserDao userDao;
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
public void add() {
userDao.add();
}
}
配置连接池
<?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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 配置c3p0连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 注入属性值 -->
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///spring_day03"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
</bean>
<!-- 创建service和dao对象，在service注入dao对象 -->
<bean id="userService" class="cn.itcast.c3p0.UserService">
<!-- 注入dao对象 -->
<property name="userDao" ref="userDao"></property>
</bean>
<bean id="userDao" class="cn.itcast.c3p0.UserDao">
<!-- 注入jdbcTemplate对象 -->
<property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean>
<!-- 创建jdbcTemplate对象 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<!-- 把dataSource传递到模板对象里面 -->
<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>2 dao使用jdbcTemplate
（1）创建service和dao，配置service和dao对象，在service注入dao对象
（2）创建jdbcTemplate对象，把模板对象注入到dao里面
