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


 首先來看報錯的錯誤信息,一直都報空指針異常;

仔細檢查 是因為mapper上沒有@Autowired的注解

加上這個注解就不會報錯了~

 


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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 錯誤: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 報錯:嚴重: Servlet.service() for servlet [springmvc] in context with path [ ] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 報錯更改 Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] wit 錯誤:嚴重: 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無法注入,注入后無效
 
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