mongdb Java demo

接触MONGDB，感觉用起来还挺好。今天做了一个小demo。

一、启动mongdb的服务

需要指定目录，这个目录是存放数据库的。

查看服务是否已经启动。可以查看端口（默认为27017）的状态。

 

二、编写JAVA代码

      需要引入mongdb的JAR包。

    编写代码：

   

public class demo {

			

	public static void main(String[] args) {    

	    

		  try {    

		    

		   Mongo mongo = new Mongo("localhost", 27017);    

		    

		   DB db = mongo.getDB("company");    

		    

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

		    

		   BasicDBObject employee = new BasicDBObject();    

		   employee.put("name", "Hannah");    

		   employee.put("no", 2);    

		    

		   collection.insert(employee);    

		    

		   BasicDBObject searchEmployee = new BasicDBObject();    

		   searchEmployee.put("no", 2);    

		    

		   DBCursor cursor = collection.find(searchEmployee);    

		    

		   while (cursor.hasNext()) {    

		    System.out.println(cursor.next());    

		   }    

		    

		   System.out.println("The Search Query has Executed!");    

		    

		  } catch (UnknownHostException e) {    

		   e.printStackTrace();    

		  } catch (MongoException e) {    

		   e.printStackTrace();    

		  }    

		    

		 }    

}