关于Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause错误提示


 首先来看报错的错误信息,一直都报空指针异常;

仔细检查 是因为mapper上没有@Autowired的注解

加上这个注解就不会报错了~

 


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猜您在找 Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause ------>Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 错误:Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.Nul Servlet.service() for servlet [dispatcherServlet] in context with path [/heima_ssm_web] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause Servlet.service() for servlet [gCmsFront] in context with path [/cms] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPoi 报错:严重: Servlet.service() for servlet [springmvc] in context with path [ ] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 报错更改 Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] wit 错误:严重: Servlet.service() for servlet [appServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed;springboot无法注入,注入后无效
 
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