Tomcat報錯：HTTP Status 500 - Wrapper cannot find servlet class

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HTTP Status 500 - Wrapper cannot find servlet class com.servlet.servlet.RegServlet or a class it depends on

type Exception report

message Wrapper cannot find servlet class com.servlet.servlet.RegServlet or a class it depends on

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Wrapper cannot find servlet class com.servlet.servlet.RegServlet or a class it depends onorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)java.lang.Thread.run(Unknown Source)

 

root cause

java.lang.ClassNotFoundException: com.servlet.servlet.RegServletorg.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)java.lang.Thread.run(Unknown Source)

解決方案：

在確定servlet類編寫正確，及設定檔正確的情況下，仍舊出現如上問題：

準備工作：查看\WEB-INF\classes目錄下是否正常產生.class檔案，如未產生，繼續下一步

第一步：清空project—>  clean project

第二步：清空tomcat緩衝—>  對應目錄\work\Catalina\localhost 下相應工程的目錄檔案

第三步：重新發布工程

Tomcat報錯：HTTP Status 500 - Wrapper cannot find servlet class