由于組里項目大多的javascript，css等客戶端工作是另一同事在負責，該同事又特忙無法重構，老大也就只是提建議并未立即實施重構。但是我前些日子也改過些許客戶端的小bug，確實那代碼看得讓人有些云里霧里，不知身在哪山，輕易不敢動代碼，于是就自己動手鼓搗起我曾又愛又恨的javascript來，自己寫一個簡單的js實現namespace,繼承，重載等面向對象的特性.歡迎拍磚灌水
.定義namespace
Namesapce.js
Namespace = new Object();
Namespace.register = function(fullname){
try
{
var nsArray = fullname.split(".");
var strNS = "";
var strEval = "";
for(var i=0;i<nsArray.length;i++){
if(strNS.length >0)
strNS += ".";
strNS += nsArray[i];
strEval += " if(typeof("+ strNS +") =='undefined') " + strNS + " = new Object(); ";
}
if(strEval != "") eval(strEval);
}catch(e){alert(e.message);}
}
.Employee.js
Employee.js
//注冊命名空間
Namespace.register("MyCompany");
//1.類:雇員
MyCompany.Employee = function(empName){
this.Name = empName;
this.Salary = 1000;
this.Position = "cleaner";
}
MyCompany.Employee.prototype.ShowName = function(){
return "I'm "+this.Name+",my salary is $" + this.Salary;
}
MyCompany.Employee.prototype.Work = function(){
return "I'm a "+ this.Position +",I'm cleaning all day!"
}
//2.類:程序員
MyCompany.Developer = function(empName){
//繼承父類屬性
MyCompany.Employee.call(this,empName);
//覆蓋父類屬性
this.Position = "developer";
//擴展屬性
this.Technology = "C#";
}
//繼承父類原型方法
MyCompany.Developer.prototype = new MyCompany.Employee();
//覆蓋父類方法
MyCompany.Developer.prototype.Work = function(){
return "I'm a "+ this.Position +",i'm good at "+ this.Technology +",i'm coding all day!"
}
測試代碼
<html>
<title>javascript 面向對象的實現 namespace,class,繼承，重載</title>
<head>
<script language="javascript" src="namespace.js" type="text/javascript"></script>
<script language="javascript" src="employee.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
function showEmployee(){
var emp = new MyCompany.Employee("xiaoming");
showInfo(emp);
}
function showDeveloper(){
var emp = new MyCompany.Developer("Gates");
showInfo(emp);
}
function showInfo(emp){
alert(emp.ShowName());
alert(emp.Work());
}
</script>
</head>
<body>
<input type="button" value="show employee info" onclick="showEmployee();"/><br/><br/>
<input type="button" value="show developer info" onclick="showDeveloper();"/>
</body>
</html>
源代碼打包下載
