Mybatis-Plus常犯的错误之一

• 报错信息如下

  

方法一

• UserMapper

  package com.blue.mapper;
  
  import com.baomidou.mybatisplus.core.mapper.BaseMapper;
  import com.blue.bean.User;
  
  public interface UserMapper extends BaseMapper<User> {
  
  }
  

• UserService

  package com.blue.service;
  
  import com.baomidou.mybatisplus.extension.service.IService;
  import com.blue.bean.User;
  
  public interface UserService extends IService<User> {
  
  }
  

• MyApplication

  package com.blue;
  
  import org.mybatis.spring.annotation.MapperScan;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  
  @SpringBootApplication
  @MapperScan("com.blue.mapper,com.blue.service")
  public class MyApplication {
  
      public static void main(String[] args) {
          SpringApplication.run(MyApplication.class, args);
      }
  }
  

方法二

• UserMapper

  package com.blue.mapper;
  
  import com.baomidou.mybatisplus.core.mapper.BaseMapper;
  import com.blue.bean.User;
  import org.apache.ibatis.annotations.Mapper;
  
  @Mapper
  public interface UserMapper extends BaseMapper<User> {
  
  }
  

• UserService

  package com.blue.service;
  
  import com.baomidou.mybatisplus.extension.service.IService;
  import com.blue.bean.User;
  import org.apache.ibatis.annotations.Mapper;
  
  @Mapper
  public interface UserService extends IService<User> {
  
  }
  

• MyApplication

  package com.blue;
  
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  
  @SpringBootApplication
  public class MyApplication {
  
      public static void main(String[] args) {
          SpringApplication.run(MyApplication.class, args);
      }
  }
  

但是@Mapper和@MapperScan不能同时使用