【文章推薦】錯誤：Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException]

原文：錯誤：Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException]

白天創建Springboot項目對接Mybatis時，控制台與頁面報錯如下，出現了空指針，測試了一下數據庫連接正確，里面內容也都有，遂進入debug，發現查詢的返回值都是空，再將寫的sql語句手動去執行也是正確，頓覺有些無奈。那就上百度查唄，發現幾篇文章都提到了注解的問題，但是怎么看自己的注解都是沒有問題的。后來看到重啟就可以解決也嘗試了一下，無果。最后回過頭去看數據庫和實體類是否匹配，看 ...

2020-07-21 01:01 0 1660 推薦指數：

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Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception

java.lang.NullPointerException: null at com.book.app.web.UserController.findPageWith(UserController.java:50) ~[classes/:na ...

------>Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception

java.lang.NullPointerException: null at com.book.app.web.UserController.findPageWith(UserController.java:50) ~[classes/:na ...

關於Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception

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~ ...

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception

錯誤處理： 2019-10-23 17:30:46.257 ERROR 8548 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet ...

Servlet.service() for servlet [dispatcherServlet] in context with path [/heima_ssm_web] threw exception [Request processing failed; nested exception

以上報錯原因一般都是所在controller中引入service時候，忘記寫注解@Resource或者@Autowired注解導致 ...

報錯更改 Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception

使用input上傳文件時候出錯，因為在form里提交了圖文件，需要進行二進制編碼，而我卻少了這部分，即enctype="multipart/form-data"。更 ...

Servlet.service() for servlet [gCmsFront] in context with path [/cms] threw exception [Request processing failed; nested exception

項目是用spring springmvc hebrinate組成的架構，在添加的時候報了這個錯誤 controller貼在這里求大神指教 ...

報錯：嚴重: Servlet.service() for servlet [springmvc] in context with path [ ] threw exception [Request processing failed; nested exception

解決：service類或dao類需要@Autowired ...

原文：錯誤：Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException]

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