.java文件代码:
package MyBean;
public class FirstJavaBean
{
private String FirstProperty = new String("");
public FirstJavaBean()
{
}
public String getFirstProperty() //返回FirstProperty的值
{
return FirstProperty;
}
public void setFirstProperty(String value) //获取FirstProperty的初试值
{
FirstProperty = value;
}
}
jsp文件代码:
<%@ page contentType="text/html; charset=GB2312" language="java"%>
<jsp:useBean id="fb" scope="session" class="MyBean.FirstJavaBean" />
<html>
<%
fb.setFirstProperty("My First JavaBean!"); //使用javabean,设置初试值
//获取刚才设置的初试值,并显示
%>
<%=fb.getFirstProperty() %>
</html>
测试时出现如下错误:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /chap05/javabean/fbean.jsp(2,0) The value for the useBean class attribute MyBean.FirstJavaBean 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)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
很郁闷,找不到什么原因。请路过的各位看看。谢谢!
输出结果本来是:My First JavaBean!