Question

嗨我对mongodb查询api比较新，我使用mongodb java driver v 3.2。

有人可以举个例子来提取文件，其中包括＆＃34; prefContributors＆＃34; =＆＃34; RMDSContri2＆＃34;和＆＃34; dayString＆＃34;是在一系列日期之间。？我在下面提供了我的努力

{_id: "INSTR_ID9:RMDSContri1:2015-12-29 18:01:54.589"
 priceQuote:
 {
  instrId: "INSTR_ID9"
  dayString: "Dec 29, 2015 11:31:54 PM"
  prefContributors: "RMDSContri1"
  askPrice: 339.13794
  bidPrice: 333.13794
  midPrice: 336.13794
 }
} 
{_id: "INSTR_ID9:RMDSContri2:2015-12-29 18:01:56.589"
 priceQuote:
 {
  instrId: "INSTR_ID9"
  dayString: "Dec 29, 2015 11:31:56 PM"
  prefContributors: "RMDSContri2"
  askPrice: 374.5009
  bidPrice: 368.5009
  midPrice: 371.5009
 }
}

以下带浮点的代码：

BasicDBObject query = new BasicDBObject("priceQuote.prefContributors", "ReutersContri3");
query.append("priceQuote.askPrice", new BasicDBObject().append("$gte", 100.00f).append("$lte", 101.00f));

使用＆＃34; UTC＆＃34;存储和检索日期字符。时区。

但是，以下带日期的代码不会返回任何结果。

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
format.setTimeZone(TimeZone.getTimeZone("UTC"));
Date start = format.parse("2015-12-29 18:00:00");
Date end = format.parse("2015-12-29 19:00:00");
BasicDBObject query = new BasicDBObject("priceQuote.prefContributors", "ReutersContri2");
query.append("priceQuote.dayString", new BasicDBObject().append("$gte", start).append("$lte", end));

还尝试使用BasicDBObjectBuilder，但仍未返回任何结果。

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
format.setTimeZone(TimeZone.getTimeZone("UTC"));
Date start = format.parse("2015-12-29 18:00:00");
Date end = format.parse("2015-12-29 19:00:00"); 
BasicDBObjectBuilder builder = BasicDBObjectBuilder.start("$gte", start).add("$lte", end);
BasicDBObject query = new BasicDBObject("priceQuote.prefContributors", "ReutersContri3");
query.append("priceQuote.askPrice", builder.get());

mongodb日期查询不返回结果

0 个答案: