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[Java教程]Tomcat报错:HTTP Status 500

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 on	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)

 

root cause

java.lang.ClassNotFoundException: com.servlet.servlet.RegServlet	org.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)

解决方案:

在确定servlet类编写正确,及配置文件正确的情况下,仍旧出现如上问题:

准备工作:查看\WEB-INF\classes目录下是否正常生成.class文件,如未生成,继续下一步

第一步:清空project—>  clean project

第二步:清空tomcat缓存—>  对应目录\work\Catalina\localhost 下相应工程的目录文件

第三步:重新发布工程