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我们要定义一个名为com.levinzhang.Employee 的类,继承自com.levinzhang.Person,并要添加名为workExperience的属性、重写getName方法等功能:
dojo.declare("com.levinzhang.Employee", com.levinzhang.Person,{ workExperience:null, constructor: function(name,age,workExperience){ this.workExperience = workExperience; }, getWorkExperience:function(){ return this.workExperience; }, getName:function(){ return "Employee:"+this.name; }, getInput:function(){ return 5000; } });
在以上的代码中,我们定义的com.levinzhang.Employee继承了com.levinzhang.Person并添加了自定义的方法。测试代码如下:
var employee = new com.levinzhang.Employee("levin",30,4); alert(employee.getName());//将提示出Employee:levin alert(employee.getWorkExperience());//将提示出4 alert(employee.getAge());//将提示出30
可以看到在Employee的实例中,我们能够调用父类中定义的方法。而在类的constructor初始化方法中,我们并没有调用父类相关的方法,但是我们成功初始化了name和age两个属性,这是因为dojo会自动调用父类的初始化方法,完成继承要求的相关初始化工作。
example:
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title>dojo定义对象-单继承</title><script type="text/javascript" src="js/dojo-release-1.11.2/dojo/dojo.js" djConfig="parseOnLoad: true"></script><script>//定义srrdojo.declare("com.srr.Miss", null, {name: "srr",age: "26",staticInfo:{count:0},constructor: function(name, age) {this.name = name;this.age = age;++this.staticInfo.count;},getName: function() {return this.name;},getAge: function() {return this.age;}});//声明一个missvar miss1 = new com.srr.Miss("沈荣荣1",22);//alert(miss1.getName()+"---"+miss1.getAge()+"---;静态变量值="+miss1.staticInfo.count);//声明一个missvar miss2 = new com.srr.Miss("沈荣荣2",23);//alert(miss2.getName()+"---"+miss2.getAge()+"---;静态变量值="+miss1.staticInfo.count);//定义继承srr 的类daughterdojo.declare("com.srr.miss.Daughter",com.srr.Miss,{father:null,constructor:function(name,age,father){this.father=father;},getFather:function(){return this.father;},getName:function(){return "Daughter:"+this.name;},getInput:function(){return 8888;}});//生命继承类var daughter = new com.srr.miss.Daughter("沐熙",2,"ygf");alert("姓名:"+daughter.getName()+";年龄:"+daughter.getAge()+";爸爸:"+daughter.getFather());</script></head><body></body></html>
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