MongoDB for Java and CRUD operations

MongoDB: Database, collection, document, where "set" is the corresponding relational database "table", "document" corresponding to the "line".
1, first of all, download the MongoDB Java-supported driver package

<dependency>
                      <groupId> org.mongodb</groupid >
                      <artifactId> mongo-java-driver </ artifactid>
                      <version> 2.9.3</version>
               </dependency>

2. Java Connection MongoDB Database
/**
URL Database IP Address
Port ports
Dbnname database name
Tmcinfo Collection Name
**/

Mongo Mongo = new Mongo (Url,integer.parseint (port));
                 	 db = Mongo.getdb (dbname);
                                 if (db.authenticate (user, Pwd.tochararray ()) {return
                                      true;
                         	 }
                 	  Dbcollection users = db.getcollection ("Tmcinfo");

3. CRUD operation
Query：

Dbcursor cur = users.find ();
            while (Cur.hasnext ()) {
                  System.out.println (Cur.next ());
            }

Query deletion: Query for age=25 data and delete
Dbcollection.findandremove (New Basicdbobject ("Age", 25))

Insert：

  Basicdbobject document = new Basicdbobject ();
  Document.put ("id", 1001);
  Document.put ("msg", "Hello World MongoDB in Java");
  Dbcollection dbcollection = db.getcollection (table_name);
  Dbcollection. Insert (document);

BULK INSERT: A BULK insert of a single TCP request, which avoids the overhead of a fragmented request.
list<dbobject> list = new arraylist<dbobject> ();
Dbcollection. Insert (list). GETN ());//getn () Affect number of rows

Delete:
Dbcollection. Remove (New Basicdbobject ("Age", New Basicdbobject ("$gte")). GETN ())
Deletes the entire collection dbcollection.remove (); Slower than db.drop_collection (table_name), which deletes the collection directly, but all indexes are also deleted
Modify:
Dbcollection. Update (New Basicdbobject ("_id", New ObjectId ("4dde2b06feb038463ff09042")), New Basicdbobject ("Age", 121 )

Returns the updated document query age=26 data, and modifies the value of name to ABC
Dbcollection.findandmodify (New Basicdbobject ("Age,"), New Basicdbobject ("name", "ABC"));

Java-mongodb

Address of API documentation

http://api.mongodb.org/java/

Official Entry Address Http://www.mongodb.org/display/DOCS/Java+Tutorial