MyBatis-Plus之QueryMapper初识之旅一

Controller层

@RestController
@RequestMapper("/demo")
@Api("学习数据")

public class DemoController{

    @Autowired
     privite DemoService demoService;

     @RequestMapper("getSomething")
     @ApiOperation("学习数据-使用IService自带方法getOne")
     public R getSomething(@RequestParam(name="number",required=false,defaultValue="")String number){
　　　　　QueryMapper queryMapper = new QueryMapper();
　　　　　queryMapper.eq("something_number",number);
　　　　　DemoEntity demoEntity=demoService.getOne(queryMapper)//IService自带方法

　　
        return R.put("data",demoEntity);

 　　} 

}

Service层

public interface DemoService extends IService<DemoEntity>{
}