SpringMVC @autowrid注入空指针

冷不防 2022-11-28 13:33 173阅读 0赞

今天突然遇到空指针的问题

SpringMVC 项目出现了@Autowrid突然出现了空指针的问题

@Autowired  
    private IGfGoodsInfoChose choseService;

查看了网上的各种说法

包括实现类上@Service的注释，没有问题

严重: Servlet.service() for servlet [springMVC] in context with path [/wzshop] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
    java.lang.NullPointerException
    	at com.wdg.controller.GoodsChoseController.addChoseInfo(GoodsChoseController.java:68)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.__invoke(DelegatingMethodAccessorImpl.java:43)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:45009)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:45012)
    	at java.lang.reflect.Method.invoke(Method.java:497)

排查了很久，原来是我自己的方法的问题

我的方式是private方法

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RhdG91bmlhbzE_size_16_color_FFFFFF_t_70][]

我这边修改成为public 就没有问题了

感谢这篇博客:

[https://blog.csdn.net/liuxiaochang\_2011/article/details/80680878?utm\_medium=distribute.pc\_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add\_param\_isCf&depth\_1-utm\_source=distribute.pc\_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add\_param\_isCf][https_blog.csdn.net_liuxiaochang_2011_article_details_80680878_utm_medium_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add_param_isCf_depth_1-utm_source_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add_param_isCf]

希望对你有所帮助

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RhdG91bmlhbzE_size_16_color_FFFFFF_t_70]: /images/20221124/5ad9f4c262ca4d7daa4931407ce3c2e9.png
[https_blog.csdn.net_liuxiaochang_2011_article_details_80680878_utm_medium_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add_param_isCf_depth_1-utm_source_distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add_param_isCf]: https://blog.csdn.net/liuxiaochang_2011/article/details/80680878?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add_param_isCf&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.add_param_isCf