springboot启动报错CommentService required a bean of type ‘com.xxx.xxx.dao.CommentMapper‘ that could not

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于 2022-04-28 20:38:21 发布

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分类专栏：踩坑文章标签： spring boot java intellij-idea

本文链接：https://blog.youkuaiyun.com/weixin_51008024/article/details/124483058

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本文探讨了在Spring Boot应用中，CommentService因找不到CommentMapper类型bean而报错的解决方案。通过在配置文件中定义CommentMapper bean并添加@Autowired注解，解决了自动装配问题。遇到此类问题时，检查bean定义和依赖路径至关重要。

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Description:
Field commentMapper in com.xxx.xxx.service.CommentService required a bean of type ‘com.xxx.xxx.dao.CommentMapper’ that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:

Consider defining a bean of type ‘com.xxx.xxx.dao.CommentMapper’ in your configuration.

Disconnected from the target VM, address: ‘127.0.0.1:55098’, transport: ‘socket’

Process finished with exit code 0

在dao层加@Mapper注解

@Mapper
public interface CommentMapper {

    // 查看帖子回复列表
    List<Comment> selectCommentsByEntity(int entityType, int entityId, int offset, int limit);

    // 查看帖子回复数量
    int selectCommentCountByEntity(int entityType, int entityId);
}