java如何使用mongodb 3.2进行范围查询
我使用的是mongodb 3.2版本。我试图对下面的数据集使用以下查询。但由于以下异常,我无法获取记录:
Exception in thread "main" java.util.NoSuchElementException
at com.mongodb.QueryResultIterator.next(QueryResultIterator.java:103)
我的数据集:
BasicDBObject obj3 = new BasicDBObject();
obj3.put("name", "Dhoni");
obj3.put("location", "Ranchi");
obj3.put("Profession", "Cricketer");
obj3.put("number", 3);
BasicDBObject obj4 = new BasicDBObject();
obj4.put("name", "Sakshi");
obj4.put("location", "Ranchi");
obj4.put("Profession", "HtlMgmt");
obj4.put("number", 4);
BasicDBObject obj5 = new BasicDBObject();
obj5.put("name", "Ziva");
obj5.put("location", "Ranchi");
obj5.put("Profession", "Player");
obj5.put("number", 5);
我的问题是:
BasicDBObject gtquery = new BasicDBObject();
gtquery.put("number",new BasicDBObject("$gt",3).append("$lt",5));
DBCursor cursor4 = col.find(gtquery);
while(cursor4.hasNext()){
System.out.println(cursor.next());
}
有人能帮我解决这个例外吗
# 1 楼答案
要获得范围,请选择3<;数字<;5.将查询更改为: