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+"https://www.jb51.net/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="https://www.jb51.net/<%=basePath%>" > <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 type="text/css" href="https://www.jb51.net/styles.css" > --> </head> <body> <h1>系统登录</h1> <hr> <form action="dologin.jsp?mypass=999999" method="post"> <table> <tr> <td>用户名：</td> <td><input type="text" value=""/></td> </tr> <tr> <td>密码：</td> <td><input type="password" value=""/></td> </tr> <tr> <td colspan="2"><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+"https://www.jb51.net/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="https://www.jb51.net/<%=basePath%>" > <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 type="text/css" href="https://www.jb51.net/styles.css" > --> </head> <body> <jsp:useBean 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 property="*"/> --%> <!--根据表单匹配所有部分的属性 --> <%-- <jsp:setProperty property="username"/> --%> <!--根表单无关，通过手工赋值给属性 --> <%-- <jsp:setProperty property="username" value="lisi"/> <jsp:setProperty property="password" value="888888"/> --%> <!--通过URL传参数给属性赋值 --> <jsp:setProperty property="username"/> <jsp:setProperty 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
