Java Operations MongoDB Database sample sharing _mongodb

MongoDB is a document-type database, one of the most important members of the NoSQL family, and the following code encapsulates the basic operations of MongoDB.

Mongodbconfig.java

Package Com.posoftframework.mongodb;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.IOException;
Import java.util.Enumeration;
Import Java.util.HashMap;
Import java.util.Hashtable;
Import java.util.List;
Import Java.util.Map;
Import java.util.Properties;
Import Com.mongodb.DB;
Import Com.mongodb.Mongo;
  /** * MONGODB Configuration class * * @author yongtree * @date 2010-7-7 PM 07:45:08 * @version 1.0/public class Mongodbconfig {
  private static Mongo Mongo;
  private static DB db;
  private static final String mongo_db_address = "localhost";
  private static final int mongo_db_port = 27017;
  private static final String Mongo_db_username = "root";
  private static final String Mongo_db_password = "root";
  private static final String Mongo_db_dbname = "MongoDB";
  private static final String Mongo_db_resource_file = "Mongodb.cfg.properties";
  /** * MONGO Database parameters * * Private static map<string, string> Cfgmap = new hashmap<string, string> (); Private StatiC hashtable<string, db> Mongodbs = new hashtable<string, db> ();
  /** * Initialize the MONGO database */static {init ();
    public static File Getconfigfile () {String path = MongoDBConfig.class.getResource ("/"). GetPath ();
    String fileName = path + mongo_db_resource_file;
    File File = new file (fileName);
    if (file.exists ()) {return file;
  return null;
    @SuppressWarnings ("unchecked") private static void Initcfgmap () {File file = Getconfigfile ();
      if (file!= null) {Properties P = new properties ();
        try {p.load (new FileInputStream (file)); For (Enumeration ENU = P.propertynames (); enu.hasmoreelements ();)
          {String key = (string) enu.nextelement ();
          String value = (string) p.getproperty (key);
        Cfgmap.put (key, value);
        catch (IOException e) {System.out.println ("Chronicle MONGO config file failed!");
      E.printstacktrace (); } else {cfgmap.put ("MONGO.DB.ADdress ", mongo_db_address);
      Cfgmap.put ("Mongo.db.port", String.valueof (Mongo_db_port));
      Cfgmap.put ("Mongo.db.username", mongo_db_username);
      Cfgmap.put ("Mongo.db.password", Mongo_db_password);
    Cfgmap.put ("Mongo.db.dbname", mongo_db_dbname);
    }/** * Initializes the MONGO database */private static void Init () {initcfgmap ();
      try {String address = Cfgmap.get ("mongo.db.address");
      int port = integer.parseint (Cfgmap.get ("Mongo.db.port"). toString ());
      String dbname = Cfgmap.get ("Mongo.db.dbname");
      String username = cfgmap.get ("Mongo.db.username");
      String Password = cfgmap.get ("Mongo.db.password");
      MONGO = new MONGO (address, Port); if (dbname!= null &&! "".
        Equals (dbname)) {db = Mongo.getdb (dbname); if (username!= null &&! "".
        Equals (username)) {db.adduser (username, Password.tochararray ());
      } mongodbs.put (dbname, DB); The catch (IOException e) {e). Printstacktrace ();
  }/** * Get Mongo Instance * * @return/public static Mongo Getmongo () {return Mongo;
  /** * Get MONGO Image Database * * @return/public static DB Getdb () {return db;
  public static list<string> Getdbnames () {return mongo.getdatabasenames ();  /** * According to database name, get database <br/> * If not present, create a database of that name and set the username and password as parameter values in the configuration file </br> * * @param dbname *
    @return */public static DB Getdbbyname (String dbname) {db db = Mongo.getdb (dbname); if (!mongodbs.contains (db)) {Db.adduser (Cfgmap.get ("Mongo.db.username"), Cfgmap.get ("Mongo.db.password")
      . ToCharArray ());
    Mongodbs.put (dbname, DB);
  } return DB;

 }
}

Mongoservice.java

/************************* Copyright Notice ********************************* * * All rights reserved: Hundred Ocean Software * * Copyright (c) by WWW.P o-soft.com * * * ****************** 
 Change Record ********************************* * Creator: yongtree Date Created: 2010-7-7 * NOTE: * * Modified By: * Note: *
* * Package com.posoftframework.mongodb;
Import java.util.List;
Import Java.util.Map;
Import Com.mongodb.DB;
Import com.mongodb.DBCollection;
Import Com.mongodb.DBObject; /** * Operation MongoDB DAO interface * * @author yongtree * @date 2010-7-7 PM 04:44:43 * @version 1.0 * * Public interface Mongoserv
  Ice {public abstract dbcollection getcollection (); /** * According to the map of the data set, insert the key value of the dbcollection in the key corresponding database of the data map * * @param obj/public abstract dbobject Insert (DBO
  Bject obj); /** * According to List<map<stRing,object>> structure data collection, inserting data * * @param list/public abstract void Insertbatch (list<dbobject> list)
  ;
  /** * Set map with conditional parameters, delete data * * @param map */public abstract void Delete (DBObject obj);
  /** * According to the combination of various conditions, bulk delete data * * @param list/public abstract void Deletebatch (list<dbobject> list);
  /** * Get Collection () total number of records * * @return/public abstract long getcollectioncount ();
  Public abstract long GetCount (dbobject query);
  Public abstract list<dbobject> Find (dbobject query);
  Public abstract list<dbobject> Find (dbobject query,dbobject sort);
  Public abstract list<dbobject> Find (dbobject query,dbobject sort,int start,int limit); /** * Update setfields value * @param setfields * @param wherefields/public abstract void upd based on wherefields parameters
  Ate (DBObject setfields, DBObject wherefields);
  Public abstract list<dbobject> findall (); /** * Find unique data based on ID 1 ID field tags * * @parAM ID * @return/public abstract dbobject GetByID (String ID);
  /** * Get ALL database name * * @return/public list<string> getalldbnames ();
  Public abstract String getdbname ();
  public abstract void Setdbname (String dbname);
  Public abstract DB getdb ();
  Public abstract String getcollname ();
public abstract void Setcollname (String collname);

 }

Mongoserviceimpl.java

/************************* Copyright Notice ********************************* * * All rights reserved: Hundred Ocean Software * * Copyright (c) by WWW.P o-soft.com * * * ****************** 
 Change Record ********************************* * Creator: yongtree Date Created: 2010-7-7 * NOTE: * * Modified By: * Note: *
* * Package com.posoftframework.mongodb;
Import java.util.ArrayList;
Import java.util.List;
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; /** * * @author yongtree * @date 2010-7-7 Afternoon 07:22:15 * @version 1.0/public class Mongoserviceimpl implements Mong
  Oservice {private String dbname;
  Private String Collname;
  private DB DB; Public MongoserViceimpl (String dbname, String collname) {this.dbname = dbname;
    This.collname = Collname;
    try {db = Mongodbconfig.getdbbyname (this.dbname);
    catch (Throwable e) {e.printstacktrace ();
  } public Mongoserviceimpl () {getdb ();
  Public Dbcollection GetCollection () {return db.getcollection (this.collname);
    Public DBObject map2obj (map<string, object> Map) {dbobject obj = new Basicdbobject ();
    if (Map.containskey ("class") && Map.get ("Class") Instanceof Class) Map.Remove ("class");
    Obj.putall (map);
  return obj;
    Public dbobject Insert (DBObject obj) {getcollection (). Insert (obj);
  return obj;
    public void Insertbatch (list<dbobject> list) {if (list = = NULL | | list.isempty ()) {return;
    } list<dbobject> Listdb = new arraylist<dbobject> ();
    for (int i = 0; i < list.size (); i++) {Listdb.add (List.get (i)); } getcollection (). Insert (LISTDB);
  public void Delete (DBObject obj) {getcollection (). Remove (obj);
    public void Deletebatch (list<dbobject> list) {if (list = = NULL | | list.isempty ()) {return;
    for (int i = 0; i < list.size (); i++) {getcollection (). Remove (List.get (i));
  } public Long Getcollectioncount () {return getcollection (). GetCount ();
    Public long GetCount (DBObject obj) {if (obj!= null) return GetCollection (). GetCount (obj);
  return Getcollectioncount ();
    list<dbobject> find (DBObject obj) {dbcursor cur = getcollection (). find (obj);
  return dbcursor2list (cur);
    @Override public list<dbobject> Find (dbobject query, dbobject sort) {dbcursor cur;
    if (query!= null) {cur = getcollection (). Find (query);
    else {cur = getcollection (). find ();
    } if (sort!= null) {cur.sort (sort);
  return dbcursor2list (cur); } @Override Public list<dbobject>Find (dbobject query, dbobject sort, int start, int limit) {dbcursor cur;
    if (query!= null) {cur = getcollection (). Find (query);
    else {cur = getcollection (). find ();
    } if (sort!= null) {cur.sort (sort);
    } if (start = = 0) {cur.batchsize (limit);
    else {cur.skip (start). limit (limit);
  return dbcursor2list (cur); Private list<dbobject> dbcursor2list (dbcursor cur) {list<dbobject> List = new ARRAYLIST&LT;DBOBJECT&G
    t; ();
    if (cur!= null) {list = Cur.toarray ();
  } return list; } public void Update (DBObject setfields, DBObject wherefields) {getcollection (). Updatemulti (Setfields, Wherefields)
  ;
    Public list<dbobject> FindAll () {dbcursor cur = getcollection (). find ();
    list<dbobject> list = new arraylist<dbobject> ();
    if (cur!= null) {list = Cur.toarray ();
  } return list; Public DBObject GetByID (String id) {DBObject obj = new Basicdbobject ();
    Obj.put ("_id", new ObjectId (ID));
    DBObject result = GetCollection (). FindOne (obj);
  return result;
  Public String Getdbname () {return dbname;
    } public void Setdbname (String dbname) {this.dbname = dbname;
  This.db = Mongodbconfig.getdbbyname (this.dbname);
  Public String Getcollname () {return collname;
  } public void Setcollname (String collname) {this.collname = Collname; The public DB Getdb () {if (this.db = = null) {if (This.dbname = null) {this.db = Mongodbconfig.getdb (
      );
      else {this.db = Mongodbconfig.getdbbyname (this.dbname);
  } return this.db;
  Public list<string> Getalldbnames () {return mongodbconfig.getdbnames ();
 }
}