Spring 框架下（增删改）基本操作

//applicationContext.xml 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns="http://www.springframework.org/schema/beans"

xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
">

<context:property-placeholder location="classpath:db.properties"/>

<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="user" value="${jdbc.user}"></property>
         <property name="password" value="${jdbc.password}"></property>
</bean>

   <bean name="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
         <property name="dataSource" ref="dataSource"></property>
   </bean>
   
   <bean name="userDaoImp" class="cn.jy.domain.UserDaoImp">
        <property name="dataSource" ref="dataSource"></property>
   </bean>
</beans>

//UserDaoImp继承于UserDao接口

package cn.jy.domain;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

//import org.apache.tomcat.util.digester.RuleSet;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

import cn.jy.dao.UserDao;
//使用JDBC模板实现增删改查
public class UserDaoImp extends JdbcDaoSupport implements UserDao {

   public void save(User u) {
      String sql="insert into user1 values(2,?)";
       super.getJdbcTemplate().update(sql, u.getName());
   }

   public void delete(Integer id) {
       String sql="delete from user1 where id=?";
       super.getJdbcTemplate().update(sql, id);

   }

   public void update(User u) {
       String sql="update user1 set name=? where id=?";
       super.getJdbcTemplate().update(sql,u.getName(), u.getId());

   }

   public User getById(Integer id) {
       String sql="select * from user1 where id=?";
       return super.getJdbcTemplate().queryForObject(sql, new RowMapper<User>(){
           public User mapRow(ResultSet rs,int arg) throws SQLException{
               User u = new User();
               u.setId(rs.getInt("id"));
               u.setName(rs.getString("name"));
               return u;
           }
       },id);
   }

   public int getTotalCount() {
       String sql ="select count(*) from user1";
       Integer num = super.getJdbcTemplate().queryForObject(sql, Integer.class);
       return num ;
   }

   public List<User> getAll() {
       String sql="select * from user1";
       List<User> list= super.getJdbcTemplate().query(sql, new RowMapper<User>(){
           public User mapRow(ResultSet rs,int arg) throws SQLException{
           User u=new User();
          u.setId(rs.getInt("id"));
          u.setName(rs.getString("name"));
          System.out.println(u);
          return u;
           }
           });
       return list;
   }

}

//测试类Demo.java

package cn.jy.dao;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

//创建容器
@RunWith(SpringJUnit4ClassRunner.class)

//连接配置文件
@ContextConfiguration("classpath:applicationContext.xml")
public class Demo {

//与 Spring框架下配置UserDaoImp进行连接
@Resource(name="userDaoImp")

    //声明要调用的对象
   private UserDao us;
    @Test
    //存储数据
//    public void fun1(){
//       User u=new User();
//       u.setName("tong");
//       us.save(u);
//    }
    //获得id为2的name值
//    public void fun1(){
//       System.out.println(us.getById(2));
//    }
    //插入数据
//    public void fun1(){
//       User u = new User();
//       u.setId(2);
//       u.setName("tiger");
//       us.update(u);
//    }
    //获得所有数据
//    public void fun1(){
//       us.getAll();
//    }
    //获得数据总数
//    public void fun1(){
//       System.out.println(us.getTotalCount());
//
//    }
    //删除数据
    public void fun1(){
       us.delete(3);
    }

}

Spring 框架下 （增 删 改 ）基本操作

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Spring 框架下（增删改）基本操作