问初级的JAVABEAN问题
小弟在运行这个文件时.出现错误页面:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /02_23.jsp(12,0) The value for the useBean class attribute BeanExample.SimpleBean 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)
原02_23.JSP文件如下
<html>
<head>
<title> 一个useBean动作的例子 </title>
</head>
<%@ page contentType= "text/html;charset=GB2312 " %>
<body>
<center>
<h2>
这是一个使用useBean动作的例子
</h2>
</center>
<jsp:useBean id= "test " class= "BeanExample.SimpleBean " scope= "page "/>
<% test.setString( "This is a useBean Action example "); %>
<p>
<h3>
<%=test.displayString()%>
</h3>
</p>
</body>
</html>
原SimpleBean.java文件如下:
package BeanExample;
public class SimpleBean
{
String str= " ";
public SimpleBean()
{
str= "This is the inital string ";
}
public void setString(String str1)
{
str= "Hello! "+str1;
}