如何通过idea实现springboot集成mybatis

spring.datasource.url = jdbc:mysql://127.0.0.1:3306/test
spring.datasource.username = root
spring.datasource.password = root
spring.datasource.driverClassName = com.mysql.cj.jdbc.Driver

package com.liji.science;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
@SpringBootApplication
public class ScienceApplication {
    public static void main(String[] args) {
        SpringApplication.run(ScienceApplication.class, args);
    }
}

package com.liji.science.controller;
import com.liji.science.bean.User;
import com.liji.science.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
public class UserController {
    @Autowired
    private UserService userService;
    @RequestMapping("/listUser")
    public  List<User> listUser(Model model) {
        List<User> users = userService.findAll();
        model.addAttribute("users", users);
        return users;
    }
    /*@RequestMapping("/toAdd")
    public String toAdd() {
        return "/addUser";
    }
    @RequestMapping("/add")
    public String addUser(User user) {
        userService.addUser(user);
        return "redirect:/listUser";
    }
    @RequestMapping("/toUpdate")
    public String toUpdate(Model model, int id) {
        User user = userService.findById(id);
        model.addAttribute("user", user);
        return "/updateUser";
    }
    @RequestMapping("/update")
    public String updateUser(User user) {
        userService.updateUser(user);
        return "redirect:/listUser";
    }
    @RequestMapping("/delete")
    public String deleteUser(int id) {
        userService.deleteUser(id);
        return "redirect:/listUser";
    }*/
}

package com.liji.science.mapper;
import com.liji.science.bean.User;
import org.apache.ibatis.annotations.*;
import java.util.List;
@Mapper
public interface UserMapper {
    /**
     * 全部用户查询
     * @return
     */
    @Select("SELECT ID,NAME,PASSWORD,AGE FROM USER")
    List<User> findAll();
    /**
     * 新增用户
     */
    @Insert("INSERT INTO USER(NAME,PASSWORD,AGE)VALUES(#{name}, #{password}, #{age})")
    void addUser(User user);
    /**
     * 修改用户
     */
    @Update("UPDATE USER SET NAME=#{name}, PASSWORD=#{password}, AGE=#{age} WHERE ID=#{id}")
    void updateUser(User user);
    /**
     * 删除用户
     */
    @Delete("DELETE FROM USER WHERE ID=#{id}")
    void deleteUser(int id);
    @Select("SELECT ID,NAME,PASSWORD,AGE FROM USER WHERE ID=#{id}")
    User findById(@Param("id")int id);
}

创建实体类
package com.liji.science.bean;
public class User {
    private int id;
    private String name;
    private String password;
    private int age;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}