你的位置:首页 > Java教程

[Java教程]javaweb项目jsp跳转servlet Error instantiating servlet class 问题


问题:

HTTP Status 500 - Error instantiating servlet class RecommenderServlet


type Exception report

message Error instantiating servlet class RecommenderServlet

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

exception

javax.servlet.ServletException: Error instantiating servlet class RecommenderServlet	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	java.lang.Thread.run(Thread.java:745)

 

root cause

java.lang.ClassNotFoundException: RecommenderServlet	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	java.lang.Thread.run(Thread.java:745)

解决方法:问题出在web.
  例如:<servlet-class>cn.fth.servlet.RecommenderServlet</servlet-class>