Dojo 入门

最新推荐文章于 2020-03-19 10:50:05 发布

rat9912345

最新推荐文章于 2020-03-19 10:50:05 发布

阅读量652

点赞数

CC 4.0 BY-SA版权

分类专栏： DOJO Javascript 文章标签： dojo function constructor java url json

本文链接：https://blog.youkuaiyun.com/rat9912345/article/details/5466692

Javascript 同时被 2 个专栏收录

12 篇文章

订阅专栏

DOJO

4 篇文章

订阅专栏

第一步，引入dojo.js dojo的发行包里有4个子目录，要引入的文件是名叫"dojo"的子目录里的dojo.js。假设你是这样的目录结构:
    引用
    project | +--dojo-lib | | | +--dijit | +--dojo | +--dojox | +--util | +--dojo_hello_world.html
    Java代码
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js"></script>
    Java代码
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js"></script>
    Java代码
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js"></script>
    view plaincopy to clipboardprint?
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js"></script>
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js"></script>开始使用dojo 现在开始使用dojo的第一个函数:dojo.byId dojo.byId就等同于常用的document.getElement <input type="text" name="username" id="username" value="Mark" /> <script type="text/javascript"> var username = dojo.byId(’username’).value alert(username); </script> OK，是不是和普通的js库一样，没有任何玄机？ dojo.addOnLoad 现在我们想在window.onload里面处理一点东西，就像Ext.onReady，这个东西在dojo里叫做dojo.addOnLoad Java代码
    dojo.addOnLoad(function(){
        var username = dojo.byId(’username’).value
        alert(username);
    });
    Java代码
    dojo.addOnLoad(function(){
        var username = dojo.byId(’username’).value
        alert(username);
    });
    Java代码
    dojo.addOnLoad(function(){
        var username = dojo.byId(’username’).value
        alert(username);
    });
    view plaincopy to clipboardprint?
    dojo.addOnLoad(function(){
        var username = dojo.byId(’username’).value
        alert(username);
    });
    dojo.addOnLoad(function(){
     var username = dojo.byId(’username’).value
     alert(username);
    });dojo.connect OK，window.onload搞定了，那么如何监听普通的dom事件呢？没问题，强大的dojo.connect出场 Java代码
    <script type="text/javascript">
    function sayHello(event)
    {
        alert("Hello");
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",sayHello);
    });
    </script>
    <input type="button" id="hello" value="Hello" />
    Java代码
    <script type="text/javascript">
    function sayHello(event)
    {
        alert("Hello");
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",sayHello);
    });
</script>
    <input type="button" id="hello" value="Hello" />
    Java代码
    <script type="text/javascript">
    function sayHello(event)
    {
        alert("Hello");
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",sayHello);
    });
    </script>
    <input type="button" id="hello" value="Hello" />
    view plaincopy to clipboardprint?
    <script type="text/javascript">
    function sayHello(event)
    {
        alert("Hello");
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",sayHello);
    });
    </script>
    <input type="button" id="hello" value="Hello" />
    <script type="text/javascript">
    function sayHello(event)
    {
     alert("Hello");
    }
    dojo.addOnLoad(function(){
     var btn = dojo.byId(’hello’);
     dojo.connect(btn,"onclick",sayHello);
    });
    </script>
    <input type="button" id="hello" value="Hello" />
    是不是和prototype的Event.observe($(’btnAdd’), "load", doAdd)差不多? 用prototype时最烦的就是那个长长的bindAsListener了，使用dojo.conncect，可以在第三个参数中指定当前的scope： Java代码
    var name = "Mark"
    function sayHello()
    {
        alert("Hello " + this.name);
    }
    var obj = {
        name: "Karl"
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",obj,sayHello);//注意这行的第三个和第四个参数
    });
    Java代码
    var name = "Mark"
    function sayHello()
    {
        alert("Hello " + this.name);
    }
    var obj = {
        name: "Karl"
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",obj,sayHello);//注意这行的第三个和第四个参数
    });
    Java代码
    var name = "Mark"
    function sayHello()
    {
        alert("Hello " + this.name);
    }
    var obj = {
        name: "Karl"
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",obj,sayHello);//注意这行的第三个和第四个参数
    });
    view plaincopy to clipboardprint?
    var name = "Mark"
    function sayHello()
    {
        alert("Hello " + this.name);
    }
    var obj = {
        name: "Karl"
    }
    dojo.addOnLoad(function(){
        var btn = dojo.byId(’hello’);
        dojo.connect(btn,"onclick",obj,sayHello);//注意这行的第三个和第四个参数
    });
    var name = "Mark"
    function sayHello()
    {
     alert("Hello " + this.name);
    }
    var obj = {
     name: "Karl"
    }
    dojo.addOnLoad(function(){
     var btn = dojo.byId(’hello’);
     dojo.connect(btn,"onclick",obj,sayHello);//注意这行的第三个和第四个参数
    });
    OK，点击按钮，将输出：Hello Karl 这里dojo.connect的第三个参数变成了scope，而handler函数是第四个，实际上 dojo.connect(btn,"onclick",sayHello); 与 dojo.connect(btn,"onclick",null,sayHello); 相同。更加复杂的用法这里不作介绍，写太多就越搞越复杂了，后面再写文章详细介绍dojo.connect，这里只简单介绍如何绑定DOM事件。 xmlhttp dojo.xhrGet OK，介绍了简单的DOM操作方法，接下来该到Ajax的传统项目-XmlHttp了在使用xmlhttp时，需要注意到编码的问题，要让dojo默认绑定为utf-8怎么办呢？很简单，只需要修改一下引入dojo.js时的标签： Java代码
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js" djConfig="isDebug:true,bindEncoding:’UTF-8’"></script>
    Java代码
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js" djConfig="isDebug:true,bindEncoding:’UTF-8’"></script>
    Java代码
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js" djConfig="isDebug:true,bindEncoding:’UTF-8’"></script>
    view plaincopy to clipboardprint?
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js" djConfig="isDebug:true,bindEncoding:’UTF-8’"></script>
    <script type="text/javascript" src="./dojo-lib/dojo/dojo.js" djConfig="isDebug:true,bindEncoding:’UTF-8’"></script>多了一个djConfig属性，很简单，第一个isDebug是说是否打开FireBug的Console，第二个是xmlhttp使用的编码。第二个才是重点，设置了就一劳永逸了。这次我们要点击了hello按钮后发出一个xmlhttp请求: Java代码
    function sayHello() {
        dojo.xhrGet({
            url: "http://localhost/hello/sayHello.jsp",
            handleAs: "text",
            load: function(responseText)
            {
              alert(responseText);
              dojo.byId("divHello").innerHTML = responseText;
            },
            error: function(response)
            {
              alert("Error");
            }
        });
    }
    dojo.connect(btn,"onclick",sayHello);
    Java代码
    function sayHello() {
        dojo.xhrGet({
            url: "http://localhost/hello/sayHello.jsp",
            handleAs: "text",
            load: function(responseText)
            {
              alert(responseText);
              dojo.byId("divHello").innerHTML = responseText;
            },
            error: function(response)
            {
              alert("Error");
            }
        });
    }
dojo.connect(btn,"onclick",sayHello);
    Java代码
    function sayHello() {
        dojo.xhrGet({
            url: "http://localhost/hello/sayHello.jsp",
            handleAs: "text",
            load: function(responseText)
            {
              alert(responseText);
              dojo.byId("divHello").innerHTML = responseText;
            },
            error: function(response)
            {
              alert("Error");
            }
        });
    }
    dojo.connect(btn,"onclick",sayHello);
    view plaincopy to clipboardprint?
    function sayHello() {
        dojo.xhrGet({
            url: "http://localhost/hello/sayHello.jsp",
            handleAs: "text",
            load: function(responseText)
            {
              alert(responseText);
              dojo.byId("divHello").innerHTML = responseText;
            },
            error: function(response)
            {
              alert("Error");
            }
        });
    }
    dojo.connect(btn,"onclick",sayHello);
    function sayHello() {
        dojo.xhrGet({
            url: "http://localhost/hello/sayHello.jsp",
            handleAs: "text",
            load: function(responseText)
            {
              alert(responseText);
              dojo.byId("divHello").innerHTML = responseText;
            },
            error: function(response)
            {
              alert("Error");
            }
        });
    }
    dojo.connect(btn,"onclick",sayHello);看看，够不够一目了然？ url 就是url…… handleAs 把获取的内容作为text/html load 成功时的回调函数 error 失败时的回调函数那如果要传入参数怎么办? Java代码
    var params = {
        username:’Mark’,
        id:’105’
    }
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        content:params,
        //...
    });
    Java代码
    var params = {
        username:’Mark’,
        id:’105’
    }
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        content:params,
        //...
    });
    Java代码
    var params = {
        username:’Mark’,
        id:’105’
    }
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        content:params,
        //...
    });
    view plaincopy to clipboardprint?
    var params = {
        username:’Mark’,
        id:’105’
    }
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        content:params,
        //...
    });
    var params = {
        username:’Mark’,
        id:’105’
    }
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        content:params,
        //...
    });
    注意那个content参数，你要传入的参数是个关联数组/object，dojo会自动把参数解析出来，要使用post方法？ dojo.xhrGet ---> dojo.xhrPost 其他的还有 dojo.xhrPut dojo.xhrDelete json 那要是我想更换获取到的数据类型，比如json？xml？修改handleAs即可，如： handleAs: "json" Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        handleAs: "json",
        load: function(json)
        {
            alert(json.name)
        }
        //...
    });
    Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        handleAs: "json",
        load: function(json)
        {
            alert(json.name)
        }
        //...
    });
    Java代码
dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        handleAs: "json",
        load: function(json)
        {
            alert(json.name)
        }
        //...
    });
    view plaincopy to clipboardprint?
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        handleAs: "json",
        load: function(json)
        {
            alert(json.name)
        }
        //...
    });
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        handleAs: "json",
        load: function(json)
        {
            alert(json.name)
        }
        //...
    });
    引用
    handleAs: "json-comment-filtered" 使用注释符号/**/把json数据包含起来,推荐使用 handleAs: "json-comment-optional" 首先尝试使用json-comment-filtered,如果执行错误,再使用普通的json格式解析 handleAs: "javascript" dojo尝试把服务器返回的数据当作javascript执行,并把结果作为参数传递给load函数 handleAs: "xml" xml对象。注意在Mozilla和IE中的xml是不同的，推荐使用sarissa
    至于json和object的转换等，在http://dojotoolkit.org/book/dojo-book-0-9/part-3- programmatic-dijit-and-dojo/other-miscellaneous-function/converting-json 有一个表格，应该能找到你需要的。想要直接提交一个表单,就这样: Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        form: dojo.byId("form1")
        //...
    });
    Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        form: dojo.byId("form1")
        //...
    });
    Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        form: dojo.byId("form1")
        //...
    });
    view plaincopy to clipboardprint?
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        form: dojo.byId("form1")
        //...
    });
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        form: dojo.byId("form1")
        //...
    });
    要解决IE下那个臭名昭著的缓存问题，就这样,preventCache会帮你自动生成一个timestamp Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        preventCache: true
        //...
    });
    Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        preventCache: true
        //...
    });
    Java代码
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        preventCache: true
        //...
    });
    view plaincopy to clipboardprint?
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        preventCache: true
        //...
    });
    dojo.xhrGet({
        url: "http://localhost/hello/sayHello.jsp",
        preventCache: true
        //...
    });
    dojo.hitch scope/context 既然用到了xmlhttp，一个常见的问题就是回调函数的scope/context。在prototype、mootools里我们常用Function.bind，在dojo中，做相同事情的东西叫做dojo.hitch Java代码
    var handler = {
        name:’Mark’,
        execute1: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: function(text)
                {
                    console.dir(this);
                    alert(this.name);//输出undefined,这里的this表示当前io参数
                }
                //...
            });
        },
        load: function(text){
            alert(this.name);
        },
        execute2: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: dojo.hitch(this,"load") //输出Mark
                //error: dojo.hitch(this,this.load); //与上一句相同,知道为什么要用方法名字而不是引用了吧?省去了长长的一串this.xxx
                //...
            });
        }
    }
    Java代码
    var handler = {
        name:’Mark’,
        execute1: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: function(text)
                {
                    console.dir(this);
                    alert(this.name);//输出undefined,这里的this表示当前io参数
                }
                //...
            });
        },
        load: function(text){
            alert(this.name);
        },
        execute2: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: dojo.hitch(this,"load") //输出Mark
                //error: dojo.hitch(this,this.load); //与上一句相同,知道为什么要用方法名字而不是引用了吧?省去了长长的一串this.xxx
                //...
            });
        }
    }
    Java代码
    var handler = {
        name:’Mark’,
        execute1: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: function(text)
                {
                    console.dir(this);
                    alert(this.name);//输出undefined,这里的this表示当前io参数
                }
                //...
            });
        },
        load: function(text){
            alert(this.name);
        },
execute2: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: dojo.hitch(this,"load") //输出Mark
                //error: dojo.hitch(this,this.load); //与上一句相同,知道为什么要用方法名字而不是引用了吧?省去了长长的一串this.xxx
                //...
            });
        }
    }
    view plaincopy to clipboardprint?
    var handler = {
        name:’Mark’,
        execute1: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: function(text)
                {
                    console.dir(this);
                    alert(this.name);//输出undefined,这里的this表示当前io参数
                }
                //...
            });
        },
        load: function(text){
            alert(this.name);
        },
        execute2: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: dojo.hitch(this,"load") //输出Mark
                //error: dojo.hitch(this,this.load); //与上一句相同,知道为什么要用方法名字而不是引用了吧?省去了长长的一串this.xxx
                //...
            });
        }
    }
    var handler = {
        name:’Mark’,
        execute1: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: function(text)
                {
                    console.dir(this);
                    alert(this.name);//输出undefined,这里的this表示当前io参数
                }
                //...
            });
        },
        load: function(text){
            alert(this.name);
        },
        execute2: function(){
            dojo.xhrGet({
                url: "http://localhost/hello/sayHello.jsp",
                handleAs: "text",
                error: dojo.hitch(this,"load") //输出Mark
                //error: dojo.hitch(this,this.load); //与上一句相同,知道为什么要用方法名字而不是引用了吧?省去了长长的一串this.xxx
                //...
            });
        }
    }
    OK，基本的东西解决了，还有很多常用的函数没有介绍，比如：dojo.query，dojo.forEach，dojo.marginBox，dojo.contentBox等等这个就没事翻翻dojo.js.uncompressed.js源代码，dojo的文档是没啥好指望的了。面向对象,定义Class 下一步我们看看dojo里如何定义Class： Java代码
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
        },
        say:function(){
            alert("Hello " + this.name);
        },
        getDiscount:function(){
            alert("Discount is 1.0");
        }
    });
    var customer1 = new Customer("Mark");
    customer1.say();
    Java代码
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
        },
        say:function(){
            alert("Hello " + this.name);
        },
        getDiscount:function(){
            alert("Discount is 1.0");
        }
    });
    var customer1 = new Customer("Mark");
    customer1.say();
    Java代码
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
        },
        say:function(){
            alert("Hello " + this.name);
        },
        getDiscount:function(){
            alert("Discount is 1.0");
        }
    });
    var customer1 = new Customer("Mark");
    customer1.say();
    view plaincopy to clipboardprint?
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
        },
        say:function(){
            alert("Hello " + this.name);
        },
        getDiscount:function(){
            alert("Discount is 1.0");
        }
    });
    var customer1 = new Customer("Mark");
    customer1.say();
    dojo.declare("Customer",null,{
        constructor:function(name){
      &,nbsp;     this.name = name;
        },
        say:function(){
            alert("Hello " + this.name);
        },
        getDiscount:function(){
            alert("Discount is 1.0");
        }
    });
    var customer1 = new Customer("Mark");
    customer1.say();
    declare有三个参数: 第一个 class名字第二个父类的引用第三个 ... 构造函数的名字就叫做"construnctor" 再来看看如何继承: Java代码
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            alert("Discount is 0.8");
        }
    });
    var vip = new VIP("Mark");
    vip.say();
    vip.getDiscount();
    Java代码
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            alert("Discount is 0.8");
        }
    });
    var vip = new VIP("Mark");
    vip.say();
    vip.getDiscount();
    Java代码
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            alert("Discount is 0.8");
        }
    });
    var vip = new VIP("Mark");
    vip.say();
    vip.getDiscount();
    view plaincopy to clipboardprint?
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            alert("Discount is 0.8");
        }
    });
    var vip = new VIP("Mark");
    vip.say();
    vip.getDiscount();
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            alert("Discount is 0.8");
        }
    });
    var vip = new VIP("Mark");
    vip.say();
    vip.getDiscount();那么，如何调用父类的方法呢。使用this.inherited方法 Java代码
dojo.declare("VIP",Customer,{
        getDiscount:function(){
            this.inherited(arguments);
            //this.inherited("getDiscount",arguments);
        }
    });
    Java代码
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            this.inherited(arguments);
            //this.inherited("getDiscount",arguments);
        }
    });
    Java代码
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            this.inherited(arguments);
            //this.inherited("getDiscount",arguments);
        }
    });
    view plaincopy to clipboardprint?
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            this.inherited(arguments);
            //this.inherited("getDiscount",arguments);
        }
    });
    dojo.declare("VIP",Customer,{
        getDiscount:function(){
            this.inherited(arguments);
            //this.inherited("getDiscount",arguments);
        }
    });
    关于构造函数: 父类构造函数总是被自动调用的，所以看下面的例子: Java代码
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
            alert("base class");
        },
        say:function(){
            alert(this.name);
        }
    });
    dojo.declare("VIP",Customer,{
        constructor:function(age){
            this.age = age;
            alert("child class");
        },
        say:function(){
            alert("name:" + this.name);
            alert("age:" + this.age);
        }
    });
    var vip = new VIP("123");//1
    vip.say();//2
    Java代码
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
            alert("base class");
        },
        say:function(){
            alert(this.name);
        }
    });
    dojo.declare("VIP",Customer,{
        constructor:function(age){
            this.age = age;
            alert("child class");
        },
        say:function(){
            alert("name:" + this.name);
            alert("age:" + this.age);
        }
    });
    var vip = new VIP("123");//1
    vip.say();//2
    Java代码
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
            alert("base class");
        },
        say:function(){
            alert(this.name);
        }
    });
    dojo.declare("VIP",Customer,{
        constructor:function(age){
            this.age = age;
            alert("child class");
        },
        say:function(){
            alert("name:" + this.name);
            alert("age:" + this.age);
        }
    });
    var vip = new VIP("123");//1
    vip.say();//2
    view plaincopy to clipboardprint?
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
            alert("base class");
        },
        say:function(){
            alert(this.name);
        }
    });
    dojo.declare("VIP",Customer,{
        constructor:function(age){
            this.age = age;
            alert("child class");
        },
        say:function(){
            alert("name:" + this.name);
            alert("age:" + this.age);
        }
    });
    var vip = new VIP("123");//1
    vip.say();//2
    dojo.declare("Customer",null,{
        constructor:function(name){
            this.name = name;
            alert("base class");
        },
        say:function(){
            alert(this.name);
        }
    });
    dojo.declare("VIP",Customer,{
        constructor:function(age){
            this.age = age;
            alert("child class");
        },
        say:function(){
            alert("name:" + this.name);
            alert("age:" + this.age);
        }
    });
    var vip = new VIP("123");//1
    vip.say();//2
  1将打印出两条alert语句，先是父类的构造函数，再是子类的。 2将输出"name: 123" "age: 123" 个人认为，这个特性并不好，因为javascript这种弱类型的语言中，根本无法确定构造函数中的参数是传递给谁的，就比如上面的语句执行后， name="123",age="123"，那哪个才是正确的？这个问题在使用dojo Grid的model里就很麻烦，定义一个model得这样:new dojox.grid._data.Table(null,null,data);我要是想扩展这个Model，更麻烦，所有子类的构造函数都被父类给搞乱了。所以推荐的做法是使用关联数组作为构造函数的参数，就像Python里的关键字参数。 Java代码
    constructor:function(args){
        var args = args || {};
        this.name = args.name;
        this.age = args.age;
    }
    Java代码
    constructor:function(args){
        var args = args || {};
        this.name = args.name;
        this.age = args.age;
    }
    Java代码
    constructor:function(args){
        var args = args || {};
        this.name = args.name;
        this.age = args.age;
    }
    view plaincopy to clipboardprint?
    constructor:function(args){
        var args = args || {};
        this.name = args.name;
        this.age = args.age;
    }
    constructor:function(args){
        var args = args || {};
        this.name = args.name;
        this.age = args.age;
    }
    多继承,mixin 说到继承，多继承的问题又来了。dojo支持多继承，准确地说，是mixin。还记得dojo.declare的第二个参数吗，就是表示父类的那个参数，这个参数可以是一个数组，数组的第一个元素作为声明的类的父类，其他的作为mixin。子类自动获得父类和mixin的所有方法，后面的 mixin的同名方法覆盖前面的方法 Java代码