前面都是一樣的，只是在後面的MyService中用的是interface，再呼叫interface的繼承類。

MyService.java

package com.example.service;

import com.example.model.Userinfo;

public interface MyService {

    public Userinfo getUserinfo(Integer id);
}

MyServiceimpl.java

package com.example.service;

import com.example.dao.UserinfoMapper;
 
import com.example.model.Userinfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class MyServiceImpl implements MyService {
    @Autowired
    UserinfoMapper userinfoMapper;
    @Override
    public Userinfo getUserinfo(Integer id) {
        
 
return userinfoMapper.selectByPrimaryKey(id);
    }
}

MyController.java

package com.example.control;

import com.example.service.MyService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
 
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class MyController {
    @Autowired
    MyService myService;

    @RequestMapping("/hehe/id/{id}")
    public @ResponseBody Object hehe(@PathVariable("id")Integer id){
        return myService.getUserinfo(id);
    }
}

這裡面用的是Restful的方式來代入變數。

然後就是程序序入口了。

package com.example;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan("com.example.dao")
@SpringBootApplication
public class Spring007Mybatis03Application {

    public static void main(String[] args) {
        SpringApplication.run(Spring007Mybatis03Application.class, args);
    }

}

此文章是https://www.cnblogs.com/gangliao81/p/16253248.html的補充。