IDEA警告：Field injection is not recommended的处理方法分享

今天在Service.java文件中引入Mappers时,出现了警告信息"Field injection is not recommended",
那么如何处理这个警告信息呢?下文笔者将一一道来，如下所示

问题描述

@Service
public class OaContractExpendServiceImpl implements IOaContractExpendService 
{

     @Autowired
    private OaContractExpendMapper oaContractExpendMapper;
}

只需修改注入方式

由于新版的Spring不再推荐使用字段注入的方式
    建议修改为基于构造函数的依赖注入
采用以上方式,就可避免IDEA的警告信息

@Service
public class OaContractExpendServiceImpl implements IOaContractExpendService 
{
 
    private OaContractExpendMapper oaContractExpendMapper;

    @Autowired
	public OaContractExpendServiceImpl(OaContractExpendMapper oaContractExpendMapper){
	 this.oaContractExpendMapper = oaContractExpendMapper;
	}
}