spring boot集成mybatis-plus——根据多个id查询用户信息

package org.example.controller;

import org.example.Entity.MyUser;
import org.example.mapper.UserMapper;
import org.example.service.MyUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.Arrays;
import java.util.List;

@RestController
public class MyUserController
{

    @Autowired
    private MyUserService myUserService;

    @Autowired
    private UserMapper userMapper;


    /**
     * 查询所有用户信息
     * @return
     */
    @GetMapping(value = "/findAll")
    public List<MyUser> findAll()
    {
        // 查询所有用户信息
        List<MyUser> users = myUserService.findAll();

        for (MyUser user : users)
        {
            System.out.println(user.getId()+"  "+user.getName()+"  "+user.getAge());
        }

        return users;
    }


    /**
     * 增加一个用户
     * @return
     */
    @GetMapping(value = "/save")
    public int save()
    {
        MyUser user = new MyUser();
        user.setName("小文");
        user.setAge(21);

        int insert = myUserService.save(user);//如果没有设置id，那么会自动生成id

        System.out.println(insert);//受影响行数

        System.out.println(user);//id会自动回填

        return insert;
    }


    /**
     * 根据id修改用户信息
     * @return
     */
    @GetMapping(value = "/updateById")
    public int updateById()
    {
        MyUser user = new MyUser();
        user.setId(1014);
        user.setName("小文改");
        user.setAge(222);

        int insert = myUserService.update(user);

        System.out.println(insert);//受影响行数


        return insert;
    }


    /**
     * 根据用户名修改用户信息
     * @return
     */
    @GetMapping(value = "/updateByName")
    public int updateByIdName()
    {

        int insert = myUserService.updateByName();

        System.out.println(insert);//受影响行数

        return insert;
    }

    ///

    ///

    ///

    ///


    /**
     * 根据单个id查询数据
     * @return
     */

    @GetMapping(value = "/findById")
    public MyUser findById()
    {

        MyUser user = userMapper.selectById("1015");

        System.out.println(user);

        return user;
    }


    /**
     * 根据多个id查询数据
     * @return
     */
    @GetMapping(value = "/findByMoreId")
    public List<MyUser> findByMoreId()
    {
        List list1 = Arrays.asList(1014,1015);
        List<MyUser> list2 = userMapper.selectBatchIds(list1);

        System.out.println(list2);

        return list2;
    }



    

}