<%@ page language="java" import="java.util.*" pageEncoding="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 ‘test3.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"> --> <script src="js/jquery-2.1.1.min.js"></script> <script> var obj={}; //实例化对象 obj.name="张三"; //属性赋值 obj[‘age‘]=21; //赋值的时候.和[]都是可以的,但是一定要加上引号 obj.getName=function(){ alert(this.name); } //obj.getName(); //使用delete可以删除对象的属性方法 delete obj.name; // alert(obj.name); //undefined //遍历js对象 for in语句格式 for(var attribute in obj){ //alert(attribute+‘=‘+obj[attribute]); //遍历对象用[]不要用.,会出现undefined } //constructor保存对象的创建函数 //alert(obj.constructor); //hasOwnProperty(property)判断所给属性在对象中是否存在 //alert(obj.hasOwnProperty(‘age‘)); //一定要加上引号 alert(obj.propertyIsEnumerable(‘age‘)); //判断属性是否可以for in 枚举出来 </script> </head> <body> This is my JSP page. <br> </body> </html>
时间: 2024-10-17 02:51:02