web一些实验代码—— JavaBean与EL标签

发布时间：2023年12月30日

?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: cic
  Date: 2023/11/8
  Time: 10:13
  To 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: cic
  Date: 2023/11/8
  Time: 10:20
  To 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: cic
  Date: 2023/11/8
  Time: 10:29
  To 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: cic
  Date: 2023/11/8
  Time: 10:59
  To 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>

文章来源:https://blog.csdn.net/ysy1119/article/details/135305722
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