我们以前在前端遍历ajax拿到的数据一般都是用for或其他方式遍历，这样做麻烦且费事，效率不高，下面提供一个函数，只需调用函数即可把数据遍历出来，方便高效。
html代码：
<html>
<head><script type="text/javascript" src="./jquery.js"></script>
</head>
<body><qweewq><ul><li>{list.name}</li> <li>{list.info}</li> <!-- <li>{name}</li><li>{info}</li> --></ul></qweewq><a href="#">asd</a>
</body>
</html>jquery函数：
/*把josn数据遍历到html页面中author:程威明参数 ：dom:包围需要遍历的html内容的标签（名称自定义，尽量复杂，不可跟常用的html标签名相同）data:ajax返回的json数据 (必须由ajax返回且类型为json) data_type:数据格式（1，2），两种:1：{"status":0,"name":["1","2","3"],"info":["a","b","c"]}2：{"status":0,"list":[{"name":"1","info":"a"},{"name":"2","info":"b"},{"name":"3","info":"c"}]}如果是格式2，html代码中的标识格式必须为{list.name}set_cookie:是否把数据保存到cookie（默认为false，不保存）,保存的格式为{"name":[1,2,3],"info":["a","b","c"]}cookie_name:存储cookie的name，若数据类型为1即默认为cookie_json，若数据类型为2即默认为数据列表的key，如上面数据类型例子中的list
*/removeCookie('firstdom');//刷新页面即清除这个cookie$.extend({'eachjson':function(dom,data,data_type,set_cookie,cookie_name){/**-------- 这部分都是为了方便用于ajax分页 ----------------------------**//**- [ajax分页](http://blog.csdn.net/codercwm/article/details/51508848) ---**/if(!getCookie('firstdom'))//把原始的html代码存入cookie{var firstdom = htmlEncode($(dom).html());setCookie('firstdom',firstdom);}if(getCookie('firstdom'))//在cookie中获得{$('qweewq').html(getCookie('firstdom'));}/**--------------------------------------------------**/var get_html = $(dom).html(); //获取自定义标签包围的html内容var json_length = 0;if(data_type==1){var html_s = each_json_data_type1(get_html,json_length,data,set_cookie); //如果为数据格式为1即调用函数1，否则调用函数2}else{var html_s = each_json_data_type2(get_html,json_length,data,set_cookie);}$(dom).html(html_s); //把原html替换为已有数据的html}});function each_json_data_type1(get_html,json_length,data,set_cookie,cookie_name)
{if(set_cookie){var cookie_json = JSON.stringify(data).replace(/"status":(.*?),/,'')if(!cookie_name){var cookie_name = 'cookie_json';}setCookie(cookie_name,cookie_json);}for(var check_length in data){if(data[check_length].length>json_length){json_length = data[check_length].length;}}var html_s = '';for(var i=0;i<json_length;i++){var html_one = get_html;$.each(data,function(k,v){ //遍历json中的key和valueif(v[i]){var val = v[i];}else{var val = '';}html_one = html_one.replaceAll('{'+k+'}',val); //把html中的标识替换为json数据中的内容});html_s += html_one;}return html_s;
}function each_json_data_type2(get_html,json_length,data,set_cookie,_cookie_name)
{/*** 作用：例如：把html代码中的{list.name}中的list匹配出来 *******/var preg = /{(.*?)\./; var key_list = get_html.match(preg);var key = key_list[1];/********* end ********************/json_length = data[key].length;var html_s = '';/* 作用：把key中的数组中的json取出放到对应的地方 *****************/var cookie_val = new Array();var cookie_key = new Array();var m = 0;$.each(data[key],function(index_key,value){var html_one = get_html;var n = 0;cookie_val_one = new Array();$.each(value,function(k,v){ //遍历json数组中的key和valueif(v){var val = v;}else{var val = '';}html_one = html_one.replaceAll('{'+key+'.'+k+'}',val); //把html中的标识替换为json数据中的内容//把k和v保存到数组中if(set_cookie) {if(i=(json_length-1)){cookie_key[n] = k;}cookie_val_one[n] = v;}n++;});if(set_cookie) cookie_val[m] = cookie_val_one; //把v保存成二维数组html_s += html_one;m++;});if(set_cookie){var cookie_json = '{';var len = cookie_key.length;for(var j=0;j<len;j++){var cookie_value = new Array();for(var i=0;i<cookie_val.length;i++){cookie_value[i] = cookie_val[i][j];}cookie_json += ',"'+cookie_key[j]+'":'+'["'+cookie_value.join('","')+'"]';}cookie_json += '}';var newstr = cookie_json.split("");newstr[1] = ''; //把第一个‘,’删掉cookie_json = newstr.join("");if(!cookie_name){var cookie_name = key;}setCookie(cookie_name,cookie_json);}/* end ************************/return html_s;
}//设置或添加cookie
function setCookie(name,value)
{ var str = name + "=" + value;document.cookie = str;
}//获取cookie
function getCookie(name)
{ //cookie中的数据都是以分号加空格区分开 var arr = document.cookie.split("; "); for(var i=0; i<arr.length; i++){ if(arr[i].split("=")[0] == name){ return arr[i].split("=")[1]; }}//未找到对应的cookie则返回空字符串 return '';
}//删除cookie
function removeCookie(name)
{ document.cookie = name+"=;expires="+(new Date(0)).toGMTString();
}//字符窜替换所有
String.prototype.replaceAll = function(s1,s2)
{ return this.replace(new RegExp(s1,"gm"),s2);
}//html字符编码
function htmlEncode(str)
{ var s = "";if (str.length == 0) return "";s = str.replace(/&/g, ">");s = s.replace(/</g, "<");s = s.replace(/>/g, ">");s = s.replace(/ /g, " ");s = s.replace(/\'/g, "'");s = s.replace(/\"/g, "");s = s.replace(/\n/g, "");return s;
} //html字符解码
function htmlDecode(str)
{ var s = "";if (str.length == 0) return "";s = str.replace(/>/g, "&");s = s.replace(/</g, "<");s = s.replace(/>/g, ">");s = s.replace(/ /g, " ");s = s.replace(/'/g, "\'");s = s.replace(/"/g, "\"");s = s.replace(/<br>/g, "\n");return s;
}test.php中的代码：
<?php
//echo '{"status":0,"name":["aa","bb","cc","dd","ee"],"info":[1,2,3,4,5]}';
echo '{"status":0,"list":[{"name":"1","info":"a"},{"name":"2","info":"b"},{"name":"3","info":"c"}]}';ajax代码：
$.ajax({url:'http://localhost/test.php',type:'post',dataType:'json', //必须为jsondata:{data:1},success:function(res){$.eachjson('qweewq',res,2,1); //调用函数（qweewq为包围要遍历的html代码的自定义标签）var aaa = getCookie('cookie_json'); //获取cookie中的数据var bbb = eval("(" + aaa + ")"); //转成json对象$('a').html(bbb.name[0])}});最后浏览器中输出的结果为：
