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云风笔记
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一、service/NoteApi新增delNode接口定义

public interface NoteApi {
    ...
    int deleteNote(NoteManage noteManage);
}

二、service/impl/NoteServiceImpl接口实现逻辑

public class NoteServiceImpl implements NoteApi {
    @Autowired
    NoteMapper noteMapper;
    ...

    public int delNote(int id){
        int count = 0;
        try {
            count = noteMapper.delNote(id);
        }catch (Exception err){
            System.out.println(err);
        }
        return count;
    }

}

三、mapper/NoteMapper新增接口

...
import org.apache.ibatis.annotations.Param;

public interface NoteMapper {
    ...
    int delNote(int noteId);
}

四、新增sql语句

<delete id="delNote">
    DELETE FROM note WHERE id = #{id}
</delete>

五、NoteManage添加获取id/设置id

之前更新接口已经声明，这里不用变更代码

六、控制类NoteController新增更新逻辑

 @RequestMapping(value = "/delNote",method = RequestMethod.POST)
public Response delNote(@RequestBody NoteManage noteManage){
    int id = noteManage.getNoteId();
    if(id!=0){
        int count = service.delNote(id);
        if(count>0){
            Response response = new Response(true,"删除成功",200);
            return response;
        }else {
            Response response = new Response(false,"删除失败",400);
            return response;
        }
    }else {
        Response response = new Response(false,"删除失败，请传入id",400);
        return response;
    }
}

六、接口请求测试

数据库原数据

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