找不到bean（The value for the useBean class attribute test.acceptPara is invalid）,该怎么处理
日期：2014-05-18 浏览次数：20873 次
找不到bean（The value for the useBean class attribute test.acceptPara is invalid）
报错：
org.apache.jasper.JasperException: /wlxy_1/web/acceptPara.jsp(4,0) The value for the useBean class attribute test.acceptPara is invalid.
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:150)
org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1227)
org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1116)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Generator.generate(Generator.java:3272)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:244)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
JSP 页面1：
---------------------------
<form method= "POST " action= "acceptPara.jsp ">
<p align= "center ">
姓 名： <input type= "text " name= "name " size= "20 "> <br>
年 龄： <input type= "text " name= "age " size= "15 "> <br>
性 别： <input type= "radio " value= "male " checked name= "sex ">
男 <input type= "radio " name= "sex " value= "female ">
女 </p>
<p align= "center ">
<input type= "submit " value= "submit " name= "submit ">
<input type= "reset " value= "reset " name= "reset "> </p>
</form>
页面2：
acceptPara.jsp
-----------------------------------------------------
<%@ page language= "java " errorPage= "error.jsp " %>
<html>
<%@ page import= "test.acceptPara " contentType= "text/html;charset=gb2312 "%>
<jsp:useBean id= "atest &
报错：
org.apache.jasper.JasperException: /wlxy_1/web/acceptPara.jsp(4,0) The value for the useBean class attribute test.acceptPara is invalid.
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:150)
org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1227)
org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1116)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Generator.generate(Generator.java:3272)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:244)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
JSP 页面1：
---------------------------
<form method= "POST " action= "acceptPara.jsp ">
<p align= "center ">
姓 名： <input type= "text " name= "name " size= "20 "> <br>
年 龄： <input type= "text " name= "age " size= "15 "> <br>
性 别： <input type= "radio " value= "male " checked name= "sex ">
男 <input type= "radio " name= "sex " value= "female ">
女 </p>
<p align= "center ">
<input type= "submit " value= "submit " name= "submit ">
<input type= "reset " value= "reset " name= "reset "> </p>
</form>
页面2：
acceptPara.jsp
-----------------------------------------------------
<%@ page language= "java " errorPage= "error.jsp " %>
<html>
<%@ page import= "test.acceptPara " contentType= "text/html;charset=gb2312 "%>
<jsp:useBean id= "atest &
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