MongoDB複雜查詢樣例代碼-Java

mongodb 與  或 多條件查詢

數據：

{ "_id" : ObjectId("55adba52fa1f3cf038c2aea6"), "name" : "user0", "age" : 22, "sex" : 0 }

{ "_id" : ObjectId("55adba52fa1f3cf038c2aea7"), "name" : "user1", "age" : 23, "sex" : 1 }

{ "_id" : ObjectId("55adba52fa1f3cf038c2aea8"), "name" : "user2", "age" : 24, "sex" : 0 }

{ "_id" : ObjectId("55adba52fa1f3cf038c2aea9"), "name" : "user3", "age" : 25, "sex" : 1 }

{ "_id" : ObjectId("55adba52fa1f3cf038c2aeaa"), "name" : "user4", "age" : 26, "sex" : 0 }

{ "_id" : ObjectId("55adba52fa1f3cf038c2aeab"), "name" : "user5", "age" : 27, "sex" : 1 }

代碼：

@Test
    public void testMongo(){

        MongoClient mClient = new MongoClient("127.0.0.1");

        DB db = mClient.getDB("zydb");

        DBCollection collection = db.getCollection("firstCollection");

        //{"$and":[{"age":{"$gt":23}},{"sex":1}]}
        BasicDBObject ageObj = new BasicDBObject("age",new BasicDBObject("$gt",23));

        BasicDBObject sexObj = new BasicDBObject("sex",1);

        BasicDBObject andObj = new BasicDBObject("$and", Arrays.asList(ageObj,sexObj));

        Cursor cursor = collection.find(andObj);

        while(cursor.hasNext()){

            DBObject obj = cursor.next();

            System.out.println(obj.toString());

        }

        //{"$or":[{"name":"user2"},{"name":"user3"}]}
        BasicDBObject user2Obj = new BasicDBObject("name","user2");

        BasicDBObject user3Obj = new BasicDBObject("name","user3");

        BasicDBObject orObj = new BasicDBObject("$or",Arrays.asList(user2Obj,user3Obj));

        Cursor cursor2 = collection.find(orObj);

        while(cursor2.hasNext()){

            DBObject obj = cursor2.next();

            System.out.println(obj.toString());

        }
    }

結果：

{ "_id" : { "$oid" : "57e9e3d8e08ed42d9c8ba5e2"} , "name" : "user3" , "age" : 25.0 , "sex" : 1.0}
{ "_id" : { "$oid" : "57e9e40de08ed42d9c8ba5e4"} , "name" : "user5" , "age" : 27.0 , "sex" : 1.0}
{ "_id" : { "$oid" : "57e9e3c8e08ed42d9c8ba5e1"} , "name" : "user2" , "age" : 24.0 , "sex" : 0.0}
{ "_id" : { "$oid" : "57e9e3d8e08ed42d9c8ba5e2"} , "name" : "user3" , "age" : 25.0 , "sex" : 1.0}