【Mybaits学习】03_ CRUD基于注解

Mybaits CRUD基于注解的实现

1、定义sql映射的接口

package nh.ui.automation.tools.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import nh.ui.automation.tools.Mybaits.User;

/**
 * 项目 ：UI自动化测试 Mybaits 类描述：
 * 
 * @author Eric
 * @date 2017年3月4日 nh.ui.automation.tools.mapper
 */
public interface UserMapper {

    @Insert("insert into user(name,age) values(#{name},#{age})")
    public int addUser(User user);

    @Delete("delete from user where id = #{id}")
    public int deleteUser(int id);

    @Update("update user set name=#{name},age=#{age} where id = #{id}")
    public int updateUser();

    @Select("select * from user where id = #{id}")
    public User getUser(int id);
    
    @Select("select * from user")
    public List<User> getAllUser();

}

2、Mybaits配置文件注册映射接口

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<properties resource="db.properties"></properties>

	<environments default="development">
		<environment id="development">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="${db.driver}" />
				<property name="url" value="${db.url}" />
				<property name="username" value="${db.username}" />
				<property name="password" value="${db.password}" />
			</dataSource>
		</environment>
	</environments>

	<mappers>
		<mapper resource="Mappings/userMapper.xml"/>
		<mapper resource="Mappings/orderMapper.xml"/>
	</mappers>
</configuration>

3、测试代码

        //其他地方不变,主要通过getMapper方法加载sql映射
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        User user = mapper.getUser(2);
        System.out.println(user);
        
        int addUser = mapper.addUser(new User("niuh",11));
        System.out.println(addUser);
        
        
        List<User> users = mapper.getAllUser();
        System.out.println(users);
        
        int deleteUser = mapper.deleteUser(1);
        System.out.println(deleteUser);
        
         List<User> user1s = mapper.getAllUser();
        System.out.println(user1s);