把json格式对象转成可提交字符串格式,会过滤掉函数 {a: {b: 3}, b: [1], c: "d"} -> a.b=3&b[0]=1&c=d

var json = {
       name: "任务名称" ,
       scoreRule: "",
       score: "",           //     如果规则表达式不为空，则默认选中 “按规则表达式计算”
       unique: 1,
       startTime: "2014-09-15 20:20:20",
       endTime: "2014-10-15 20:20:20",
       status: 1,
       isTaks: 0,
       tradeType: 1,
       description: "业务描述" ,
       codes: [ "16", "6" ],  // 选中的平台
       ids: [ "3"],                        // app内部链接
       test: {
              a: 1,
              b: [1, 2, 3]
       }
};

var json2 = {
       a: 1,
       b: 2,
       c: {
              a: 1,
              b: {
                     a: 1,
                     b: [1, 2]
              },
              c: [1, 2]
       },
       d: [1, 2, {
              a: 1,
              b: {
                     a: 1
              },
              c: [1, 2]
       }]
};

/**
 * 把json格式对象转成可提交字符串格式,会过滤掉函数 {a: {b: 3}, b: [1], c: "d"} -> a.b=3&b[0]=1&c=d
 * @param  {Object} data   要转化的json对象
 * @param  {String} prefix 要带的前缀
 * @return {String}        字符串
 */
function paramData(data, prefix) {
        var _getType = ({}).toString,
              _paramArray = function(arr, prefix) {
                      var    result = [],
                           j = 0,
                           len = arr.length;

                      for (; j < len; j++) {
                            var data = arr[j],
                                   type = _getType.call(data),
                                   subPrefix = prefix + "[" + j + "]";

                           result = result.concat(_paramAll(arr[j], prefix + "[" + j + "]"));
                     }

                      return result;
              },
              _paramAll = function(data, prefix) {
                      var result = [],
                           type = _getType.call(data);

                      switch (type) {
                            case "[object Object]" :
                                   var subPrefix = prefix ? prefix + "." : "",
                                                                 i;

                                   for (i in data) result = result.concat(_paramAll(data[i], subPrefix + i));
                                   break;
                            case "[object Array]" :
                                  result = result.concat(_paramArray(data, prefix));
                                   break;
                            case "[object String]" :
                            case "[object Number]" :
                                  result.push(prefix + "=" + data);
                     }

                      return result;
              };

       prefix = prefix || "";
        // if (prefix) {     // prefix必须以 . 结尾
        //     prefix = /\.$/.test(prefix) ? prefix : (prefix + ".");
        // } else {
        //     prefix = "";
        // }

        return (function () {
               return _paramAll(data, prefix);
       }()).join( "&");      
}

console.log(paramData(json2, "rule"));
console.log(paramData(json, "rule"));