mybatis的Insert方式的实现

2018-12-14  本文已影响12人  简单Liml

项目基于前博客。
1.单条插入
在接口UserDao文件下添加接口:

void addUser(UserModel userModel);

在UserController下添加方法:

@RequestMapping(value = "/addUser", method = RequestMethod.GET)
    public void addUser(@RequestParam("userName") String userName,
                                @RequestParam(value = "userAge",defaultValue = "0") Integer userAge){
        UserModel user = new UserModel();
        user.setUserAge(userAge);
        user.setUserName(userName);
        userDao.addUser(user);
    }

在mapper的UserDAO.xml添加数据库sql:

<insert id="addUser" parameterType="com.lml.helloworld3.pojo.UserModel">

        INSERT INTO user_first (user_name, user_age) value (#{userName}, #{userAge})
    </insert>

测试成功!

2.批量插入
在接口UserDao文件下添加接口:

void addUsers(List<UserModel> users);

在UserController下添加方法:

@RequestMapping(value = "/addUsers", method = RequestMethod.GET)
    public void addUsers(){
        List<UserModel> list = new ArrayList<>();
        UserModel user1 = new UserModel();
        user1.setUserAge(1);
        user1.setUserName("u1");
        list.add(user1);
        UserModel user2 = new UserModel();
        user2.setUserAge(2);
        user2.setUserName("u2");
        list.add(user2);

        userDao.addUsers(list);
    }

在mapper的UserDAO.xml添加数据库sql:

<insert id="addUsers" parameterType="java.util.List">
        insert into user_first (user_name, user_age) values
        <foreach collection="list" item="item" index="index" separator=",">
            (#{item.userName,jdbcType=VARCHAR},
             #{item.userAge,jdbcType=BIGINT})
        </foreach>
    </insert>

测试成功!

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