我要评论jsp的setproperty的使用方法
一 介绍
<jsp:setproperty>作用
给已经实例化的javabean对象的属性赋值，一共有四种形式。
二 四种形式
三 实例
1、login.jsp
<%@ page language="java" import="java.util.*" contenttype="text/html; charset=utf-8" %>
<%
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%>" rel="external nofollow" rel="external nofollow" >
<title>my jsp 'login.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" >
-->
</head>
<body>
<h1>系统登录</h1>
<hr>
<form name="loginform" action="dologin.jsp?mypass=999999" method="post">
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="username" value=""/></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="password" value=""/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="登录"/></td>
</tr>
</table>
</form>
</body>
</html>
2、dologin.jsp
<%@ page language="java" import="java.util.*" contenttype="text/html; charset=utf-8"%>
<%
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%>" rel="external nofollow" rel="external nofollow" >
<title>my jsp 'dologin.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" >
-->
</head>
<body>
<jsp:usebean id="myusers" class="com.po.users" scope="page"/>
<h1>setproperty动作元素</h1>
<hr>
<!--根据表单自动匹配所有的属性 -->
<%--
<jsp:setproperty name="myusers" property="*"/>
--%>
<!--根据表单匹配所有部分的属性 -->
<%--
<jsp:setproperty name="myusers" property="username"/>
--%>
<!--根表单无关，通过手工赋值给属性 -->
<%--
<jsp:setproperty name="myusers" property="username" value="lisi"/>
<jsp:setproperty name="myusers" property="password" value="888888"/>
--%>
<!--通过url传参数给属性赋值 -->
<jsp:setproperty name="myusers" property="username"/>
<jsp:setproperty name="myusers" property="password" param="mypass"/>
<!-- 使用传统的表达式方式来获取用户名和密码 -->
用户名：<%=myusers.getusername() %><br>
密码：<%=myusers.getpassword() %><br>
<br>
<br>
</body>
</html>
四 运行结果
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