iframe-proxy | Sunbelt Computer Software

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<title>Interface3</title>
		<meta name="author" content="Administrator" />
		<link rel="" href="" type="text/css"/>
		<script type="text/javascript" charset="utf-8">
			// js 实现java接口实现的编程模式
			// 实现方法：1 声明式  //2 属性检测方法 // 3 鸭式辨型法
			// 3 鸭式辨型法
			function Interface(name,methods){
				this.name = name;
				this.methods = [];
				// alert(typeof methods == 'object' && methods.constructor == Array); // true
				// alert( methods instanceof Array); // true
				// alert(Object.prototype.toString.call(methods) === '[object Array]'); // true
				for(var i=0;i<methods.length;i++){
					this.methods.push(methods[i]);
			// 3.2 定义接口
			var CompositeInterface = new Interface('Composite',['add','del']);
			var FormitemInterface = new Interface('Formitem',['update','select']);
			Interface.ensureImplement = function(instance){
				for(var i=1;i<arguments.length;i++){
					var isImplement = false;
					var interface = arguments[i];
					// interface 必须是接口的构造方法
					if(!interface.constructor == Interface){
						throw new Error("the instance does not implement the interface "+interface.name);
					for(var j=0;j<interface.methods.length;j++){
						if(!instance[interface.methods[j]] || typeof instance[interface.methods[j]] !== 'function'){ // 判断对象中是否有包含接口方法
							throw new Error("the instance does not implement the "+interface.methods[j]+" method of "+interface.name);
						isImplement = true;
				return isImplement;
			// 3.3 实现接口
			function CompositeImpl(){
			CompositeImpl.prototype.add = function(){
				alert('add');
			// CompositeImpl.prototype.del = function(){
				// alert('del');
			CompositeImpl.prototype.update = function(){
				alert('update');
			// CompositeImpl.prototype.select = function(){
				// alert('select');
			// 2.3 测试
			// alert(typeof Interface == 'function');  // 可以判断是否是函数
			// alert(typeof Interface == 'array');  // 不可以判断是否是数组 CompositeImpl();
			// Interface.ensureImplement(obj,CompositeInterface,FormitemInterface);
		</script>

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