对象转换成JSON

来源：互联网发布：淘宝茶叶排名编辑：程序博客网时间：2024/05/18 00:13
function toJSON(obj){      var objInn = obj;      if (objInn == null) {          return null;      }      switch (objInn.constructor) {          case String:              //s = "'" + str.replace(/(["\\])/g, "\\$1") + "'";   string含有单引号出错              objInn = '"' + objInn.replace(/(["\\])/g, '\\$1') + '"';              objInn= objInn.replace(/\n/g,"\\n");              objInn= objInn.replace(/\r/g,"\\r");              objInn= objInn.replace("<", "&lt;");              objInn= objInn.replace(">", "&gt;");              objInn= objInn.replace(/%/g, "%25");              objInn= objInn.replace(/&/g, "%26");              return objInn;          case Array:              var arr = [];              for(var i=0,len=objInn.length;i<len;i++) {                  arr.push(SuperMap.Util.toJSON(objInn[i]));              }              return "[" + arr.join(",") + "]";          case Number:              return isFinite(objInn) ? String(objInn) : null;          case Boolean:              return String(objInn);          case Date:              var dateStr = "{" + "'__type':\"System.DateTime\"," +                  "'Year':" + objInn.getFullYear() + "," +                  "'Month':" + (objInn.getMonth() + 1) + "," +                  "'Day':" + objInn.getDate() + "," +                  "'Hour':" + objInn.getHours() + "," +                  "'Minute':" + objInn.getMinutes() + "," +                  "'Second':" + objInn.getSeconds() + "," +                  "'Millisecond':" + objInn.getMilliseconds() + "," +                  "'TimezoneOffset':" + objInn.getTimezoneOffset() + "}";              return dateStr;          default:              if (objInn["toJSON"] != null && typeof objInn["toJSON"] === "function") {                  return objInn.toJSON();              }              if (typeof objInn === "object") {                  if (objInn.length) {                      var arr = [];                      for(var i=0,len=objInn.length;i<len;i++)                          arr.push(toJSON(objInn[i]));                      return "[" + arr.join(",") + "]";                  }                  var arr=[];                  for (attr in objInn) {                      //为解决SuperMap.Geometry类型头json时堆栈溢出的问题，attr == "parent"时不进行json转换                      if (typeof objInn[attr] !== "function" && attr !== "CLASS_NAME" && attr !== "parent") {                          arr.push("'" + attr + "':" + toJSON(objInn[attr]));                      }                  }                  if (arr.length > 0) {                      return "{" + arr.join(",") + "}";                  } else {                      return "{}";                  }              }              return objInn.toString();      }  };
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