jsp报org.apache.jasper.JasperException: Cannot find any information on property '

JSP代码：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP 'dispaly.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">    
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->  </head>
  
  <body>
    <jsp:useBean id="bean" scope="page" class="webexampleone.FristBean" />
    <jsp:getProperty name="bean" property="count" /> 
   <%bean.setCount(new Integer(1)); %>
    <%=bean.getCount() %>
  </body>
</html>
javaBean：package webexampleone;public class FristBean {

public FristBean(){

}
private int count = 0;



public int getCount(){
count ++;
return count;
} public void setCount(int count){
this.count=count;
}
}报的错：
2010-5-21 0:17:50 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: Cannot find any information on property 'count' in a bean of type 'webexampleone.FristBean'
at org.apache.jasper.runtime.JspRuntimeLibrary.getReadMethod(JspRuntimeLibrary.java:839)
at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1057)
at org.apache.jasper.compiler.Node$GetProperty.accept(Node.java:1124)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:495)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.Generator.generate(Generator.java:3416)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:231)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:347)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:589)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
另外我没有设置CLASSPATH。 和这个有关么？

解决方案 »

  1.   

    org.apache.catalina.core.StandardWrapperValve invoke
    这个错误是调用的对象为空吧
    也就是说webexampleone.FristBean为null
      

  2.   

    Cannot find any information on property 'count' in a bean of type 'webexampleone.FristBean'在你的bean里面没有找到property为count的...确定有没有这个count,FristBean中!
      

  3.   

    Cannot find any information on property 'count' in a bean of type 'webexampleone.FristBean'
    感觉像是'webexampleone.FristBean'里面没有count这个属性
      

  4.   

    恩。 因为Tomcat没加载进去。 所以就这个错误。 。 汗死了。 因为这一个小失误。 弄了 半个小时。