java操作mongoDB查询的实例详解

try { 
  System.out.println("=========********测试3开始**********===========*************"); 
  //先获取mongo库的集合DBCollection对象 
  DBCollection data = (DBCollection) mongoClientService.getColectionByName("mongo库集合名称"); 
   
  BasicDBObject query3 = new BasicDBObject(); 
  query3.put("name","Tom");//查找姓名为Tom 
 
  //查询两个时间范围的，用map包装一下 
  Map<String, Object> queryMap = new HashMap<>(); 
  queryMap.put("$gt", "1496911821071"); 
  queryMap.put("$lt", "1496915447871"); 
    query3.put("timeStamp", new BasicDBObject(queryMap)); 
    //模糊匹配rule查询 
    query3.put("businessRuleName", new BasicDBObject("$regex","rule")); 
    DBCursor result3 = data.find(query3); 
   
  String resultCode = "4"; 
  if ("4".equals(resultCode)) { 
    BasicDBList cond = new BasicDBList(); 
    cond.add("0"); 
    cond.add("1"); 
    cond.add("2"); 
    cond.add("3"); 
    query3.put("resultCode", new BasicDBObject("$nin", cond));//查询resultCode不是0,1,2,3的 
  } 
    System.out.println(result3.count());//count()方法得到查询到的记录数 
 
    result3.skip(10).limit(20);//分页，skip():从第几条开始，limit():限制返回的条数 
 
  while (result3.hasNext()) { 
    DBObject dbObject = (DBObject) result3.next(); 
    System.out.println(JSON.serialize(dbObject)); 
    System.out.println("------------"); 
  } 
  System.out.println(result3.count());// 
  System.out.println("=========********测试3结束**********===========*************"); 
} catch (Exception e) { 
  e.printStackTrace(); 
  System.out.println("---------测试3异常了----------"); 
}