使用@Autowired注解警告Field injection is not recommended

àì夳堔傛蜴生んèń 2022-12-11 07:58 227阅读 0赞

>     Field injection is not recommended
>     
>     不建议现场主入
> 
>     Field injection is not recommended 
>      Inspection info: Spring Team recommends: 
>     "Always use constructor based dependency injection in your beans. 
>     Always use assertions for mandatory dependencies".
>     始终在bean中使用基于构造函数的依赖项注入。 始终对强制性依赖项使用断言
> 
> ![20200929161921595.png][]
> 
> ![20200929162053370.png][]
> 
> **依赖注入有三种方式：**
> 
> 1.  变量（filed）注入
> 2.  构造器注入
> 3.  set方法注入
> 
>     @Autowired
>     private SysUserPhMapper sysUserPhMapper;
> 
>     private final SysUserPhMapper sysUserPhMapper;
>     
>         @Autowired
>         public SysUserServiceImpl(SysUserPhMapper sysUserPhMapper) {
>             this.sysUserPhMapper = sysUserPhMapper;
>         }
> 
>     private SysUserPhMapper sysUserPhMapper;
>     
>         public void setSysUserPhMapper(SysUserPhMapper sysUserPhMapper) {
>             this.sysUserPhMapper = sysUserPhMapper;
>         }
> 
> **参考:[https://blog.csdn.net/zhangjingao/article/details/8109452][https_blog.csdn.net_zhangjingao_article_details_8109452]**

[20200929161921595.png]: /images/20221123/8952c2f4d240454bbc35f7e1b5ab523a.png
[20200929162053370.png]: /images/20221123/e177e238773c43bcaea0ab50e5c35104.png
[https_blog.csdn.net_zhangjingao_article_details_8109452]: https://blog.csdn.net/zhangjingao/article/details/81094529