使用Java操作MongoDB

1. 首先，下载mongoDB对Java支持的驱动包 
       驱动包下载

2. 下面建立一个JavaProject工程，导入下载下来的驱动包。即可在Java中使用mongoDB.

   public class MongoDb {
       public static void main(String[] args) throws UnknownHostException {
           MongoClient mg = new MongoClient();
           DB db = mg.getDB("CRUD");
   
           DBCollection users = db.getCollection("test");
           DBCursor cur = users.find();
   
           while (cur.hasNext()) {
               System.out.println(cur.next());
           }
   
           System.out.println(cur.count());
           System.out.println(cur.getCursorId());
           System.out.println(JSON.serialize(cur));
       }
   }