当我侦听RethinkDB的更新时，能否以JSON字符串的形式获取数据？

Question

Cursor changeCursor = r.table(Hardcoded.rethinkDBTableName()).changes().getField("new_val").without("id").run(conn);
    for (Object change : changeCursor) {
        System.out.println(change);
    }

RESULT:

{  
   askPrice=1.29846,
   symbol=EUR/USD,
   bidTime=1455800529000,
   askTime=1455800529000,
   bidSize=1,
   askSize=1,
   bidPrice=1.2984
}

EXPECTED:

{  
   "askSize":1,
   "askPrice":1.2978,
   "askTime":1455729430000,
   "bidTime":1455729430000,
   "bidPrice":1.29778,
   "symbol":"EUR/USD",
   "bidSize":1
}

Answer 1

您可以编写r.table(Hardcoded.rethinkDBTableName()).changes().getField("new_val").without("id").map(val -> val.toJson()) ，我认为这样做会做些什么你要。