Mongodb之JavaApi调用例子

package cn.ac.iie;import java.net.UnknownHostException;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Iterator;import java.util.Map;import org.bson.types.ObjectId;import com.mongodb.BasicDBObject;import com.mongodb.DB;import com.mongodb.DBCollection;import com.mongodb.DBCursor;import com.mongodb.DBObject;import com.mongodb.Mongo;import com.mongodb.WriteResult;public class MongoDB1 {@SuppressWarnings("deprecation")public static void main(String[] args) throws ParseException, InterruptedException {        Mongo mongodb;try { mongodb = new Mongo("192.168.100.103", 10111);   DB db = mongodb.getDB("MyTestDB");     DBCollection myCollection = db.getCollection("MyCollection"); for(int i =0;i <10;i++){  DBObject myData= new BasicDBObject(); myData.put("_id","1"); myData.put("username","xuguokun"); myData.put("age","24");                             DateFormat insertFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");         Date date = null;         date = insertFormat.parse(insertFormat.format(new Date()));                        myData.put("time",date.getTime()+"");                           java.util.Date date1 = new Date(date.getTime());         String sDateTime1 = insertFormat.format(date1);          System.out.println("Insert before:"+sDateTime1);                       //向数据库中插入数据         myCollection.insert(myData);           }            //Mongodb查询1,全表检索，没有查询条件         DBCursor cur = myCollection.find();                  while(cur.hasNext()){                        DBObject dbObject = cur.next();                        Map map = dbObject.toMap();                        System.out.println(map.size());                        Iterator entries = map.entrySet().iterator();            while (entries.hasNext()) {                Map.Entry entry = (Map.Entry) entries.next();                String key = (String)entry.getKey();                String value = (String)entry.getValue();                //System.out.println("Key = " + key + ", Value = " + value);                                if(key.equals("time")){                               long time = Long.parseLong(value);                SimpleDateFormat selectFormat= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");                java.util.Date dt = new Date(time);                  String sDateTime = selectFormat.format(dt);  //得到精确到秒的表示：08/31/2006 21:08:00                System.out.println("Insert After:"+sDateTime);                }            }         }                  //Mongodb查询2，根据ObjectId进行检索         DBObject dbObject1 = myCollection.findOne(new ObjectId("5608fe2f4cd5756a99003fa4"));         if(dbObject1!=null){               System.out.println("Mongodb查询2，根据ObjectId进行检索:"+dbObject1.toString());         }                  //Mongodb查询2         DBObject dbObject2 = new BasicDBObject();         dbObject2.put("_id", "1");         if(myCollection.findOne(dbObject2)!=null){                 System.out.println("Mongodb查询2:"+myCollection.findOne(dbObject2).toString());         }                         //Mongodb查询3         DBObject dbObject3 = new BasicDBObject();         dbObject3.put("_id", "1");         dbObject3.put("username", "xuguokun");         if(myCollection.findOne(dbObject3)!=null){                  System.out.println("Mongodb查询3:"+myCollection.findOne(dbObject3).toString());         }                         //Mongodb删除1         DBObject delObject1 = new BasicDBObject();         delObject1.put("_id", "1");         delObject1.put("username", "xuguokun");         WriteResult  delWriteResult = myCollection.remove(delObject1);                         } catch (UnknownHostException e) {e.printStackTrace();}       }}