JSP的setProperty的使用方法
一 介紹
jsp:setProperty>作用
給已經(jīng)實(shí)例化的javabean對(duì)象的屬性賦值，一共有四種形式。
二 四種形式
三 實(shí)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>系統(tǒng)登錄/h1>
hr>
form name="loginForm" action="dologin.jsp?mypass=999999" method="post">
table>
tr>
td>用戶名：/td>
td>input type="text" name="username" value=""/>/td>
/tr>
tr>
td>密碼：/td>
td>input type="password" name="password" value=""/>/td>
/tr>
tr>
td colspan="2" align="center">input type="submit" value="登錄"/>/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動(dòng)作元素/h1>
hr>
!--根據(jù)表單自動(dòng)匹配所有的屬性 -->
%--
jsp:setProperty name="myUsers" property="*"/>
--%>
!--根據(jù)表單匹配所有部分的屬性 -->
%--
jsp:setProperty name="myUsers" property="username"/>
--%>
!--根表單無關(guān)，通過手工賦值給屬性 -->
%--
jsp:setProperty name="myUsers" property="username" value="lisi"/>
jsp:setProperty name="myUsers" property="password" value="888888"/>
--%>
!--通過URL傳參數(shù)給屬性賦值 -->
jsp:setProperty name="myUsers" property="username"/>
jsp:setProperty name="myUsers" property="password" param="mypass"/>
!-- 使用傳統(tǒng)的表達(dá)式方式來獲取用戶名和密碼 -->
用戶名：%=myUsers.getUsername() %>br>
密碼：%=myUsers.getPassword() %>br>
br>
br>
/body>
/html>
四 運(yùn)行結(jié)果
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