JSP：JAVA Bean在JSP中的运用

红太狼 2021-12-13 23:53 249阅读 0赞

目录结构，如图:

![SouthEast][]

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
      <head>
        <title>JSP测试</title>
        <script language="javascript">
        function check()
        {
          if(form1.name.value=="")
          {
            alert("姓名不能为空！");
            return false;
          }
          else if(form1.age.value=="")
          {
           alert("年龄不能为空！");
           return false;
          }
          
          return true;
        }
        </script>
      </head> 
      <body>
      <form action="Bean.jsp" method="post" id="form1" οnsubmit="return check();">
      姓名<input type="text" name="name" /><br/>
      性别<select name="sex" >
         <option value="男">男</option>
         <option value="女">女</option>
         </select>
        <br/>
      年龄<input type="text" name="age" /><br/><br/>
      <input type="submit" value=" 提  交 "  />
      <jsp:include page="Foot.jsp" />
      </form>
      </body>
      </html>

Foot.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <p align="left" style="color:red">
    版权所有 盗版必究
    </p>

Person.java

package com.xieyuan;
    
    public class Person {
    
    	private String name;
    	private String sex;
    	private String age;
    	
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public String getSex() {
    		return sex;
    	}
    	public void setSex(String sex) {
    		this.sex = sex;
    	}
    	public String getAge() {
    		return age;
    	}
    	public void setAge(String age) {
    		this.age = age;
    	}
    	
    }

Bean.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <title>My JSP 'Bean.jsp' starting page</title>
      </head>
      
      <body>
      
       <jsp:useBean id="bean" class="com.xieyuan.Person" scope="page"/>
       <%
        request.setCharacterEncoding("UTF-8");
        %>
       
       <jsp:setProperty name="bean" property="*" />
       您的信息如下:<BR/>
       <jsp:getProperty name="bean" property="name"/><br/>
       <jsp:getProperty name="bean" property="sex"/><br/>
       <jsp:getProperty name="bean" property="age"/><br/>
      </body>
    </html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.4" 
    	xmlns="http://java.sun.com/xml/ns/j2ee" 
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    	http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    
      <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
      </welcome-file-list>
      
    </web-app>

index.jsp效果如下:

![SouthEast 1][]

提交后到Bean.jsp

![SouthEast 2][]

转载于:https://www.cnblogs.com/james1207/p/3310465.html

[SouthEast]: /images/20211213/b509d4cef3654fa7b9cb4f1cda511cc6.png
[SouthEast 1]: /images/20211213/0a79343d74ca42bba99d2ea01559d300.png
[SouthEast 2]: /images/20211213/73f5bf9a46514691a11286aa085e9248.png