转换js对象为json字符串的例子

这个是基本的转换例子

<! DOCTYPE HTML PUBLIC  " -//W3C//DTD HTML 4.0 Transitional//EN " > < HTML > < HEAD > < TITLE >  json - to - string  </ TITLE > < META NAME = " Generator "  CONTENT = " EditPlus " > < META NAME = " Author "  CONTENT = " emu " > < META NAME = " Keywords "  CONTENT = " json convert " > < META NAME = " Description "  CONTENT = " convert a javascript object into a JSON string " > </ HEAD > < BODY > < SCRIPT LANGUAGE = " JavaScript " > <!-- var  data = {host:{url: " ad.market.com " ,page:[{name: " all " ,area:[{name: " rightbanner " ,tname: " all " ,tclass: " none " ,type: " jpg " ,ad:[{url: " abc.gif " ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]},{name: " leftbanner " ,tname: " all " ,tclass: " none " ,type: " jpg " ,ad:[{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]}]},{name: " index.htm " ,area:[{name: " rightbanner " ,tname: " index.htm " ,tclass: " none " ,type: " swf " ,ad:[{url: " abcdef.swf " ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]},{name: " leftbanner " ,tname: " index.htm " ,tclass: " none " ,type: " text " ,ad:[{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" },{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" },{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]}]}]}} function  obj2str(o){     var  r  =  [];     if ( typeof  o  == " string " )  return   " / "" +o.replace(/([/'/ " //]) / g, " //$1 " ).replace( / (/n) / g, " //n " ).replace( / (/r) / g, " //r " ).replace( / (/t) / g, " //t " ) + " / "" ;    if(typeof o == " undefined " ) return  " undefined " ;    if(typeof o ==  " object " ){        if(o===null) return  " null " ;        else if(!o.sort){            for(var i in o)                r.push(i+ " : " +obj2str(o[i]))            r= " { " +r.join()+ " } "         }else{            for(var i =0;i<o.length;i++)                r.push(obj2str(o[i]))            r= " [ " +r.join()+ " ] "         }        return r;    }    return o.toString();}alert(obj2str(data))//--></SCRIPT></BODY></HTML> 要是想重载系统的native code函数（比如toString，join），就要根据不同的浏览器上不同的内部函数的具体表现做特殊对待了。比如重载toString函数在IE里面是默认遍历不到的，而firefox偏偏就可以。下面的例子在IE和firefox下面测试通过： <! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > < HTML > < HEAD > < TITLE >  json-to-string  </ TITLE > < META  NAME ="Generator"  CONTENT ="EditPlus" > < META  NAME ="Author"  CONTENT ="emu" > < META  NAME ="Keywords"  CONTENT ="json convert" > < META  NAME ="Description"  CONTENT ="convert a javascript object into a JSON string" > </ HEAD > < BODY > < SCRIPT  LANGUAGE ="JavaScript" > <!-- var  data = {host:{url: " ad.market.com " ,page:[{name: " all " ,area:[{name: " rightbanner " ,tname: " all " ,tclass: " none " ,type: " jpg " ,ad:[{url: " abc.gif " ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]},{name: " leftbanner " ,tname: " all " ,tclass: " none " ,type: " jpg " ,ad:[{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]}]},{name: " index.htm " ,area:[{name: " rightbanner " ,tname: " index.htm " ,tclass: " none " ,type: " swf " ,ad:[{url: " abcdef.swf " ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]},{name: " leftbanner " ,tname: " index.htm " ,tclass: " none " ,type: " text " ,ad:[{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" },{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" },{url: "" ,width: "" ,height: "" ,menu: " red " ,tran: "" ,href: " http://music.qq.com " ,alt: " aaaaaaaaa " ,target: " _blank " ,top: "" ,bottom: "" ,left: "" ,right: "" }]}]}]},toString: function (){ return  obj2str( this )}} function  obj2str(o){     var  r  =  [];     if ( typeof  o  == " string " )  return   " / "" +o.replace(/([/'/ " //]) / g, " //$1 " ).replace( / (/n) / g, " //n " ).replace( / (/r) / g, " //r " ).replace( / (/t) / g, " //t " ) + " / "" ;    if(typeof o ==  " object " ){        if(!o.sort){            for(var i in o)                r.push(i+ " : " +obj2str(o[i]));            if(!!document.all && !/^/n?function/s*toString/(/)/s*/{/n?/s*/[native code/]/n?/s*/}/n?/s*$/.test(o.toString)){                r.push( " toString: " +o.toString.toString());            }            r= " { " +r.join()+ " } "         }else{            for(var i =0;i<o.length;i++)                r.push(obj2str(o[i]))            r= " [ " +r.join()+ " ] "         }        return r;    }    return o.toString();}alert(obj2str(data))//--></SCRIPT></BODY></HTML>