实战1--应用EL表达式访问JavaBean的属性

更新时间：2022-05-29 19:00:53

（1）编写index.jsp页面，用来收集用户的注册信息

<%@ page language="java" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>应用EL表达式访问JavaBean的属性</title>
    <link rel="stylesheet" type="text/css" href="CSS/style.css">

  </head>
  
  <body><form name="form1" method="post" action="deal.jsp">
  <table width="403" height="230" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#666666">
    <tr>
      <td height="30" colspan="2" bgcolor="#EFEFEF">·用户注册</td>
    </tr>
    <tr>
      <td width="88" align="center" bgcolor="#FFFFFF">用 户 名：</td>
      <td width="359" bgcolor="#FFFFFF"><input name="username" type="text" id="username"></td>
    </tr>
    <tr>
      <td align="center" bgcolor="#FFFFFF">密&nbsp;&nbsp;&nbsp;&nbsp;码：</td>
      <td bgcolor="#FFFFFF"><input name="pwd" type="password" id="pwd"></td>
    </tr>
    <tr>
      <td align="center" bgcolor="#FFFFFF">确认密码：</td>
      <td bgcolor="#FFFFFF"><input name="repwd" type="password" id="repwd"></td>
    </tr>
    <tr>
      <td align="center" bgcolor="#FFFFFF">性&nbsp;&nbsp;&nbsp;&nbsp;别：</td>
      <td bgcolor="#FFFFFF"><input name="sex" type="radio" class="noborder" value="男">
        男 
        <input name="sex" type="radio" class="noborder" value="女">
        女</td>
    </tr>
    <tr>
      <td align="center" bgcolor="#FFFFFF">爱&nbsp;&nbsp;&nbsp;&nbsp;好：</td>
      <td bgcolor="#FFFFFF"><input name="affect" type="checkbox" class="noborder" id="affect" value="体育">
体育 
<input name="affect" type="checkbox" class="noborder" id="affect" value="美术">
美术 
<input name="affect" type="checkbox" class="noborder" id="affect" value="音乐">
音乐
 
<input name="affect" type="checkbox" class="noborder" id="affect" value="旅游">
旅游 </td>
    </tr>
    <tr>
      <td colspan="2" align="center" bgcolor="#FFFFFF">
        <input name="Submit" type="submit" class="btn_grey" value="提交">
&nbsp;
<input name="Submit2" type="reset" class="btn_grey" value="重置"></td>
    </tr>
  </table>
 </form>
  </body>
</html>

（2）编写JavaBean

package com.wuyudong;

public class UserForm {
    private String username = "";
    private String pwd = "";
    private String sex = "";
    private String[] affect = null;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String[] getAffect() {
        return affect;
    }

    public void setAffect(String[] affect) {
        this.affect = affect;
    }
}

（3）编写deal.jsp页面

<%@ page language="java" pageEncoding="GBK"%>
<%request.setCharacterEncoding("GBK");%>
<jsp:useBean id="userForm" class="com.wuyudong.UserForm" scope="page"/>
<jsp:setProperty name="userForm" property="*"/>
<!-- jsp:setProperty name="userForm" property="affect" value='<%=request.getParameterValues("affect")%>'/> -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>应用EL表达式访问JavaBean的属性</title>
    <link rel="stylesheet" type="text/css" href="CSS/style.css">

  </head>
  
  <body>
    <table width="403" height="218" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#666666">
    <tr>
      <td height="30" colspan="2" bgcolor="#EFEFEF">·显示用户填写的注册信息</td>
    </tr>
    <tr>
      <td width="88" align="center" bgcolor="#FFFFFF">用 户 名：</td>
      <td width="359" bgcolor="#FFFFFF">&nbsp;${userForm.username}</td>
    </tr>
    <tr>
      <td align="center" bgcolor="#FFFFFF">密&nbsp;&nbsp;&nbsp;&nbsp;码：</td>
      <td bgcolor="#FFFFFF">&nbsp;${userForm.pwd}</td>
    </tr>
    <tr>
      <td align="center" bgcolor="#FFFFFF">性&nbsp;&nbsp;&nbsp;&nbsp;别：</td>
      <td bgcolor="#FFFFFF">&nbsp;${userForm.sex}</td>
    </tr>
    <tr>
      <td align="center" bgcolor="#FFFFFF">爱&nbsp;&nbsp;&nbsp;&nbsp;好：</td>
      <td bgcolor="#FFFFFF">&nbsp;${userForm.affect[0]} ${userForm.affect[1]} ${userForm.affect[2]} ${userForm.affect[3]}</td>
    </tr>
    <tr>
      <td colspan="2" align="center" bgcolor="#FFFFFF">
        <input name="Button" type="button" class="btn_grey" value="返回" onClick="window.location.href='index.jsp'">
&nbsp;</td>
    </tr>
  </table>
  </body>
</html>

运行如下图所示：

实战1--应用EL表达式访问JavaBean的属性

提交后显示：

实战1--应用EL表达式访问JavaBean的属性

上一篇 : ：Mapper 与 Reducer 解析下一篇 : java设计模式2--抽象工厂模式（Abstract Factory）

实战1--应用EL表达式访问JavaBean的属性

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