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关于javaBean的问题

userInfoBean.java
package com;

public class userInfoBean{
public String name;
public String password;
public int age;

public void setName(String name){
this.name=name;
}
public String getName()
{
return this.name;
}
public void setPassword(String password){
this.password=password;
}
public String getPassword(){
return this.password;
}
public void setAge(int age){
this.age=age;
}
public int getAge(){
return this.age;
}

}

afterResiger.jsp
<%@ page language="java" pageEncoding="utf-8" contentType="text/html;charset=utf-8"%>
<%@ page import="java.util.*" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
   <title>案例程序范例</title>
  </head>
  
  <body> 
    <jsp:plugin code="con.pictureApplet" codebase="." type="applet" align="center"
    height="143" width="170">
        <jsp:params>
             <jsp:param name="picture" value="img.jpg"/>
        </jsp:params>
        <jsp:fallback>
                                 插入小程序时出现错误
        </jsp:fallback>
        </jsp:plugin>
    <form name="caseRegisterForm" method="post" action="caseAfterregister.jsp">
        <table>
            <tr>
                <td>
                                                        设置登录账号:<input name="name" type="text" id="name"/>
                </td>
            </tr>
            <tr>
                <td>
                                                       设置登录口令:<input name="password" type="text" id="password"/>
                </td>
            </tr>
            <tr>
                <td>
                                                        设置用户年龄:<input name="age" type="text" id="age"/>
                </td>
            </tr>
            <tr>
                <td>
                      <input type="submit" value="注册">
                      <input type="submit" value="重置">
                </td>
            </tr>
        </table>
    </form>
  </body>
</html>

使用以上文件中的jsp文件后老是出现问题:http://localhost:8080/login/caseResiger.jsp登录后,出现错误:
执行应用程序出错 
这是怎么回事?在哪里出了问题???
--------------------编程问答-------------------- <form name="caseRegisterForm" method="post" action="caseAfterregister.jsp">
你这是想跳转? --------------------编程问答-------------------- 是的,就是跳转。
补充:Java ,  Java EE
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