MongoDB Small Note

A simple use of mongodb.

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package com.chuntent.mongo;import java.util.Map; import java.util.Map.Entry;import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.Mongo;public class MongoTool {     private Mongo mg = null;     public MongoTool(){         try{             mg = new Mongo("192.168.93.99", 10001);                 }catch(Exception e){             e.printStackTrace();         }     }     public boolean initConnection(String url , int port){         try{             mg = new Mongo(url, port);             return true;         }catch(Exception e){             e.printStackTrace();             return false;         }     }     /**      * @Description 向mongodb中插入数据      * @param dbname db名称      * @param collectonname 表名      * @param map 要插入的数据      * @return      */     public boolean insert(String dbname , String collectonname , Map<String , String> map){         try{             DB db = mg.getDB(dbname);             DBCollection conn = db.getCollection(collectonname);             for(Entry<String , String> en : map.entrySet()){                 BasicDBObject objDB = new BasicDBObject();                 objDB.put(en.getKey() , en.getValue());                 conn.save(objDB);             }             return true;         }catch(Exception e){             e.printStackTrace();             return false;         }     }     /**      * @Description 关闭链接      */     public void closeConnection(){         mg.close();     }     public static void main(String[] args) {         try{                     }catch(Exception e){             e.printStackTrace();         }     } }