var obj = {"common":{"bid":"","keyId":"","assetType":"PMETAL","assetCode":"iAu100g","status":"01","shortName":"iAu100g","longName":"iAu100g","tfStructure":"N","tfDel":"N","tfReal":"Y","operateTime":"","operateDate":"","dataType":"01","tfTradable":"Y","nature":"01","market":"07","prodGradeType":"01"},"assetPackageInfo":null,"assetFolders":null,"productGradeRelationship":null,"assetPmetalBaseInfo":{"keyId":"","bid":"","assetBid":"","marketBid":"07","shortname":"iAu100g","longname":"iAu100g","assetCode":"iAu100g","unit":"01","tradingUnit":"100","tradeUnitType":"01","settleVariety":"01","settleType":"01","calRepertory":"Y","realTimeComputing":"Y","marginTrade":"Y","marginRatio":"0.8","replaceSettle":"Y","replaceSettleVariety":"01","tradeMode":"01","purePercent":"100","assetTypes":"01","calendarName":"sss","calendarbid":"4","otherInfo":"iAu100g"}};
var jsonString = JSON.stringify(obj);
var encodedString = encodeURIComponent(jsonString);
console.info(encodedString);