描述服务器遇到一个内部错误()阻止它履行这个请求

[lighta0927]

type Exception report

message

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

exception

javax.servlet.ServletException: Error instantiating servlet class jsu.traves.light.servlet.listTeacher
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:403)
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:286)
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:272)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1730)
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
java.lang.Thread.run(Thread.java:662)
root cause

java.lang.ClassNotFoundException: jsu.traves.light.servlet.listTeacher
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:403)
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:286)
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:272)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1730)
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
java.lang.Thread.run(Thread.java:662)

[孟子E章]

listTeacher没有这个类

[lighta0927]

我有写了滴 public class listTeacher extends HttpServlet 它今天的错误又是 java.lang.NullPointerException at org.apache.jsp.teacher.listTeacher_jsp._jspService(listTeacher_jsp.java:91) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 我明明写了listTeacher.jsp 但它为啥提示sounce no found for org.apache.jsp.teacher.listTeacher_jsp呢 请大神再帮我看看吧