toJSONString()方法转成string有误差

{"FStockLocId":{"FSTOCKLOCID__FF100018":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100017":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100009":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100003":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100014":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100002":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100016":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100004":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100015":{"FNUMBER":"2222"}},"FEntryID":0,"FStockId":{"FNUMBER":"1"}} 一个这样的JsonObject，通过toJSONString()方法之后，转成了错误的string，如下： {"FStockLocId":{"FSTOCKLOCID__FF100018":{"FNUMBER":"2222"},"FSTOCKLOCID__FF100017":{"$ref":"$.FStockLocId.FSTOCKLOCID\_FF100018"},"FSTOCKLOCID__FF100009":{"$ref":"$.FStockLocId.FSTOCKLOCID\FF100018"},"FSTOCKLOCID__FF100003":{"$ref":"$.FStockLocId.FSTOCKLOCID\FF100018"},"FSTOCKLOCID__FF100014":{"$ref":"$.FStockLocId.FSTOCKLOCID\FF100018"},"FSTOCKLOCID__FF100002":{"$ref":"$.FStockLocId.FSTOCKLOCID\FF100018"},"FSTOCKLOCID__FF100016":{"$ref":"$.FStockLocId.FSTOCKLOCID\FF100018"},"FSTOCKLOCID__FF100004":{"$ref":"$.FStockLocId.FSTOCKLOCID\FF100018"},"FSTOCKLOCID__FF100015":{"$ref":"$.FStockLocId.FSTOCKLOCID\_FF100018"}},"FEntryID":0,"FStockId":{"FNUMBER":"1"}}。 使用JSONObject.parseObject()转成JSONObject是又正常的。但是我是需要这个string去掉别人第三方接口，第三方不一定是Java，那他去解析这个字符串就不正确了。