package mongoDB;

  import java.net.UnknownHostException;

  import java.util.ArrayList;   

  import java.util.List;

  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.MongoException;  

    

 /**

  * java

  * mongodb的數(shù)據(jù)插入、讀取、更新、刪除

  */  

  public class test{

     private static Mongo m = null;  

     private static DB db = null;  

       

     //數(shù)據(jù)集合名稱  

     private static final String COLLECTION_NAME = "mcpang";  

   

     /*

      * 測試java處理mongodb的增、刪、改、查操作

      */  

     public static void main(String[] args) {  

         //獲取數(shù)據(jù)庫連接  

         startMongoDBConn();  

         //保存數(shù)據(jù)  

         createColData();  

         //讀取數(shù)據(jù)  

         readColData();  

         //更新數(shù)據(jù)  

         updateColData();  

         //讀取數(shù)據(jù)  

         readColData();  

         //刪除數(shù)據(jù)  

         deleteColData();  

         //讀取數(shù)據(jù)  

         readColData();  

         //刪除數(shù)據(jù)集  

         db.getCollection(COLLECTION_NAME).drop();  

        //關(guān)閉數(shù)據(jù)庫連接  

         stopMondoDBConn();  

           

           

     }  

       

     /**

      * 數(shù)據(jù)插入

      * 測試數(shù)據(jù)：

      * 【name:小李、age:30、address:北京】

      * 【name:小張、age:25、address:天津】

      * @return  

      */  

     private static void createColData(){  

         DBCollection dbCol = db.getCollection(COLLECTION_NAME);  

         System.out.println("向數(shù)據(jù)集中插入數(shù)據(jù)開始：");  

         List<DBObject> dbList = new ArrayList<DBObject>();  

         BasicDBObject doc1 = new BasicDBObject();  

         doc1.put("name", "小李");  

         doc1.put("age", 30);  

         doc1.put("address", "北京");  

         dbList.add(doc1);  

           

        BasicDBObject doc2 = new BasicDBObject();  

        doc2.put("name", "小張");  

        doc2.put("age", 25);  

        doc2.put("address", "天津");  

        dbList.add(doc2);  

          

        dbCol.insert(dbList);  

        System.out.println("向數(shù)據(jù)集中插入數(shù)據(jù)完成！");  

        System.out.println("------------------------------");  

    }  

      

    /**

     * 數(shù)據(jù)讀取

     */  

    private static void readColData(){  

        DBCollection dbCol = db.getCollection(COLLECTION_NAME);  

        DBCursor ret = dbCol.find();  

        System.out.println("從數(shù)據(jù)集中讀取數(shù)據(jù)：");  

        while(ret.hasNext()){  

            BasicDBObject bdbObj = (BasicDBObject) ret.next();  

            if(bdbObj != null){  

                System.out.println("name:"+bdbObj.getString("name"));  

                System.out.println("age:"+bdbObj.getInt("age"));  

                System.out.println("address:"+bdbObj.getString("address"));  

            }  

        }  

    }  

      

    /**

     * 數(shù)據(jù)更新

     * update(q, o, upsert, multi)

     * update(q, o, upsert, multi, concern)

     * update(arg0, arg1, arg2, arg3, arg4, arg5)

     * updateMulti(q, o)

     */  

    private static void updateColData(){  

        System.out.println("------------------------------");  

        DBCollection dbCol = db.getCollection(COLLECTION_NAME);  

        DBCursor ret = dbCol.find();  

        BasicDBObject doc = new BasicDBObject();  

        BasicDBObject res = new BasicDBObject();  

        res.put("age", 40);  

        System.out.println("將數(shù)據(jù)集中的所有文檔的age修改成40！");  

        doc.put("$set", res);  

       dbCol.update(new BasicDBObject(),doc,false,true);  

        System.out.println("更新數(shù)據(jù)完成！");  

        System.out.println("------------------------------");  

    }  

      

    /**

     * 數(shù)據(jù)刪除

     */  

    private static void deleteColData(){  

        System.out.println("------------------------------");  

       DBCollection dbCol = db.getCollection(COLLECTION_NAME);  

        System.out.println("刪除【小李】！");  

        BasicDBObject doc = new BasicDBObject();  

        doc.put("name", "小李");  

        dbCol.remove(doc);  

        System.out.println("------------------------------");  

    }  

      

    /**

     * 關(guān)閉mongodb數(shù)據(jù)庫連接

     */  

    private static void stopMondoDBConn(){  

        if (null != m) {  

            if (null != db) {  

                // 結(jié)束Mongo數(shù)據(jù)庫的事務(wù)請求  

                try {  

                    db.requestDone();  

                } catch(Exception e) {  

                    e.printStackTrace();  

                }  

           }  

            try  

            {  

                m.close();  

            } catch(Exception e) {  

                e.printStackTrace();  

            }  

            m = null;  

            db = null;  

        }  

    }  

      

    /**

     * 獲取mongodb數(shù)據(jù)庫連接

     */  

    private static void startMongoDBConn(){  

        try {  

            //Mongo(p1, p2):p1=>IP地址     p2=>端口  

            m = new Mongo("127.0.0.1", 27017);  

            //根據(jù)mongodb數(shù)據(jù)庫的名稱獲取mongodb對象  

            db = m.getDB("yyl");  

            //校驗用戶密碼是否正確  

            if (!db.authenticate("yyl", "yyl123".toCharArray())){  

                System.out.println("連接MongoDB數(shù)據(jù)庫,校驗失敗！");  

            }else{  

                System.out.println("連接MongoDB數(shù)據(jù)庫,校驗成功！");  

            }  

        } catch (UnknownHostException e) {  

            e.printStackTrace();  

        } catch (MongoException e) {  

            e.printStackTrace();  

        }  

    }  

}








  

mongodb實現(xiàn)簡單的增刪改查