实验9： JavaBean与EL标签
使用javaBean和EL，完成注册和注册信息显示。
1、新建RegisterBean；
package com.example.weeebbbb.the10;public class RegisterBean {private String user;private String pass;private String repass;private String realname;private String gender;private String[] chanel;public RegisterBean() {}public String getRepass() {return repass;}public void setRepass(String repass) {this.repass = repass;}public String getUser() {return user;}public void setUser(String user) {this.user = user;}public String getPass() {return pass;}public void setPass(String pass) {this.pass = pass;}public String getRealname() {return realname;}public void setRealname(String realname) {this.realname = realname;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}public String[] getChanel() {return chanel;}public void setChanel(String[] chanel) {this.chanel = chanel;}
}
2、新建register.jsp，实现注册功能；
<%--Created by IntelliJ IDEA.User: cicDate: 2023/11/8Time: 10:13To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<body>
<form method="post" action="wek10_info1.jsp">用户名:<input type="text" name="user"><br>密码：<input type="password" name="pass"><br>真实姓名：<input type="text" name="realname"><br>性别：<input type="radio" name="gender" value="男">男<input type="radio" name="gender" value="女">女<br>你从哪里知道本网站的主题：<br><input type="checkbox" name="chanel" value="网站"/>网站<input type="checkbox" name="chanel" value="报纸"/>报纸<input type="checkbox" name="chanel" value="电视"/>电视<br><input type="submit" value="提交">
</form>
</body>
</html>
更换<form method="post" action=" ">里的action，选择不同的方法去实现信息显示
3、新建info.jsp，使用javaBean和EL实现注册信息显示。
（1）使用基本方法实现信息显示：
<%--Created by IntelliJ IDEA.User: cicDate: 2023/11/8Time: 10:20To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<body>
<%response.setContentType("text/html;charset=UTF-8");response.setCharacterEncoding("UTF-8");request.setCharacterEncoding("UTF-8");String user=request.getParameter("user");String pass=request.getParameter("pass");String gender=request.getParameter("gender");String realname=request.getParameter("realname");String chanel[]=request.getParameterValues("chanel");String newChanel="";for (int i=0;i<chanel.length;i++){if (i==chanel.length-1){newChanel+=chanel[i];}else{newChanel+=chanel[i]+",";}}
%>
<h1>用户提交信息</h1>
<table border="1"><tr><th>用户名</th><th>密码</th><th>真实姓名</th><th>性别</th><th>渠道</th></tr><tr><th><%=user%></th><th><%=pass%></th><th><%=realname%></th><th><%=gender%></th><th><%=newChanel%></th></tr>
</table>
</body>
</html>
（2）使用<jsp:getProperty>实现；
<%@ page import="com.example.weeebbbb.the10.RegisterBean" %><%--Created by IntelliJ IDEA.User: cicDate: 2023/11/8Time: 10:29To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %><%request.setCharacterEncoding("UTF-8");%>
<html>
<head><title>Title</title>
</head>
<body>
<jsp:useBean id="stu" class="com.example.weeebbbb.the10.RegisterBean" scope="request"><jsp:setProperty name="stu" property="*"/>
</jsp:useBean>
<hr>
用户名：<jsp:getProperty property="user" name="stu"/><br>
密码：<jsp:getProperty property="pass" name="stu"/><br>
确认密码：<jsp:getProperty property="repass" name="stu"/><br>
姓名：<jsp:getProperty property="realname" name="stu"/><br>
性别：<jsp:getProperty property="gender" name="stu"/><br>
你从哪里知道这个网站的：
<%request.setCharacterEncoding("UTF-8");RegisterBean rb=(RegisterBean) request.getAttribute("stu");String[] chanel=rb.getChanel();String str="";for (int i=0;i< chanel.length;i++){str=str+ chanel[i]+" ";}
%>
<%=str%>
<%--<%=stu.getChanel()%>--%>
</body>
</html>
（3）使用EL标签实现。
<%@ page import="com.example.weeebbbb.the10.RegisterBean" %><%--Created by IntelliJ IDEA.User: cicDate: 2023/11/8Time: 10:59To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %><%request.setCharacterEncoding("UTF-8");%>
<html>
<head><title>Title</title>
</head>
<body>
<h1>学生信息显示</h1>
<jsp:useBean id="stu" class="com.example.weeebbbb.the10.RegisterBean" scope="request"><jsp:setProperty name="stu" property="*"/>
</jsp:useBean>
<hr>
用户名：${stu.user}
密码：${stu.pass}
姓名：${stu.realname}
性别：${stu.gender}
信息来源渠道：
<%
// request.setCharacterEncoding("UTF-8");RegisterBean rb=(RegisterBean) request.getAttribute("stu");String[] chanel=rb.getChanel();String str="";for (int i=0;i< chanel.length;i++){str=str+ chanel[i]+" ";}request.setAttribute("str",str);
%>
${str}
</body>
</html>
