解决报错：@org.springframework.beans.factory.annotation.Autowired(required=true)

先把问题贴出来：

@org.springframework.beans.factory.annotation.Autowired(required=true)

报这个错是因为：
@Autowired(required=true)：当使用@Autowired注解的时候，其实默认就是@Autowired(required=true)，表示注入的时候，该bean必须存在，否则就会注入失败。

Mapper层

package com.yyyy.eamon.dao;import tk.mybatis.mapper.common.Mapper;import com.yzym.eamon.domain.CommUnity;//import org.springframework.stereotype.Repository;//import com.yzym.eamon.service.impl.CommunityServiceImpl;//import org.springframework.context.annotation.Bean;//import org.springframework.context.annotation.Configuration;//////@Configuration //自动注入，程序一开始就注册实例public interface CommunityMapper extends Mapper {}

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Service层

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package com.yzym.eamon.service.impl;import com.yzym.eamon.dao.CommunityMapper;import com.yzym.eamon.domain.Community;import com.yzym.eamon.service.CommunityService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.util.ArrayList;import java.util.List;//import org.springframework.context.annotation.Bean;//import org.springframework.context.annotation.Configuration;////@Configuration //自动注入，程序一开始就注册实例@Servicepublic class CommunityServiceImpl implements CommunityService {    @Autowired    private CommunityMapper communityMapper;    @Override    public List findAll(){        List communities = communityMapper.selectAll();        return communities;    }}

启动类

package com.yzym.eamon;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import tk.mybatis.spring.annotation.MapperScan;//@SpringBootApplication//MapperScan要导入Tk包//@MapperScan(basePackages = {"com.yzym.eamon.dao "})@MapperScan(basePackages = "#####") //这里填自己的地址参考Mapper的package包的位置@SpringBootApplicationpublic class EamonApplication {    public static void main(String[] args) {        SpringApplication.run(EamonApplication.class, args);    }}

解决办法:

1、先看sevice层，你有没有加上@Service注解。2、再看mapper层有没有加上@Mapper注解，以及在启动类上有没有加上@MapperScan来扫描mapepr

来源地址：https://blog.csdn.net/MiRemember/article/details/128055313