Mapper

问题：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-10-14 16:41:27.546 ERROR 42324 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Field userMapper in com.example.demo.service.impl.UserServiceImpl required a bean of type 'com.example.demo.dao.UserMapper' that could not be found.


Action:

Consider defining a bean of type 'com.example.demo.dao.UserMapper' in your configuration.

解决办法是 在dao层的UserMapper上加上@Mapper

package com.example.demo.dao;

import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

/**
 * Created by fucheng on 2018/4/29.
 */
@Mapper     //声明是一个Mapper,与springbootApplication中的@MapperScan二选一写上即可
@Repository
public interface UserMapper {

    User selectUserByName(String name);

}