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实战1--应用EL表达式访问JavaBean的属性

2015-12-30 15:56 621 查看

（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    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    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    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">
 
<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"> ${userForm.username}</td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">密    码：</td>
<td bgcolor="#FFFFFF"> ${userForm.pwd}</td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">性    别：</td>
<td bgcolor="#FFFFFF"> ${userForm.sex}</td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">爱    好：</td>
<td bgcolor="#FFFFFF"> ${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'">
 </td>
</tr>
</table>
</body>
</html>

运行如下图所示：

提交后显示：

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