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-
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 %> " > < 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"> --> </ 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 %> " > < 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"> --> </ 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