爬虫之自动生成url

Object.extend=function(props){

    //继承父类

    var prototype=Object.create(this.prototype)

    //初始化函数ctor

    var _Class=function(){

        if (this.ctor)

            this.ctor.apply(this, arguments);

    }

    //当前类属性和方法

    for(var k in props){

        prototype[k]= props[k]

    }

    _Class.prototype = prototype;

    //类继承

    _Class.extend=this.extend;

    //类扩展

    _Class.expand = function (prop) {

        for (var name in prop) {

            prototype[name] = prop[name];

        }

    };

    return _Class

}

var AutoStr=Object.extend({

    str:"",

    start:0,

    length:0,

    ctor:function(str){

        var the=this

        this.str=str

        str.replace(/\[(.)-(.)\]/,function(m,p1,p2){

            the.start=p1.charCodeAt(0)

            the.length=p2.charCodeAt(0)-the.start+1

        })

    },

    eq:function(n){

        return this.str.replace(/\[(.)-(.)\]/,String.fromCharCode(this.start+n))

    }

})

var d=new AutoStr("http://www.baidu.com/[a-z].html")

for(var i=0;i< d.length;i++){

    console.log(d.eq(i))

}

//var d=new AutoStr("http://www.baidu.com/[0-9][0-2].html")

//for(var i=0;i< d.length;i++){

//    var v=new AutoStr(d.eq(i))

//    for(var j=0;j< v.length;j++){

//        console.log(v.eq(j))

//    }

//}

　　

http://www.baidu.com/a.html
http://www.baidu.com/b.html
http://www.baidu.com/c.html
http://www.baidu.com/d.html
http://www.baidu.com/e.html
http://www.baidu.com/f.html
http://www.baidu.com/g.html
http://www.baidu.com/h.html
http://www.baidu.com/i.html
http://www.baidu.com/j.html
http://www.baidu.com/k.html
http://www.baidu.com/l.html
http://www.baidu.com/m.html
http://www.baidu.com/n.html
http://www.baidu.com/o.html
http://www.baidu.com/p.html
http://www.baidu.com/q.html
http://www.baidu.com/r.html
http://www.baidu.com/s.html
http://www.baidu.com/t.html
http://www.baidu.com/u.html
http://www.baidu.com/v.html
http://www.baidu.com/w.html
http://www.baidu.com/x.html
http://www.baidu.com/y.html
http://www.baidu.com/z.html