Java uses the latest API to manipulate MongoDB

//

Package Com.auto.test.dbmodel;

Import java.util.ArrayList;

Import org.bson.Document;
Import Org.bson.conversions.Bson;

Import com.mongodb.MongoClient;
Import com.mongodb.client.FindIterable;
Import com.mongodb.client.MongoCollection;
Import Com.mongodb.client.MongoDatabase;

/**
* Class Description
*
* @author LUOZT
* @date New September 19, 2016
*/
public class Dbconnutil {

Public String IP;
public int port;
Public String dbname;
Mongoclient mongoclient;
Mongodatabase DB;
Finditerable<document> Cursor=null;
Long update_count=0;
Long delete_count=0;


Public Dbconnutil (String ip,int port,string dbname) {

This.ip=ip;
This.port=port;
This.dbname=dbname;

}


Public Mongodatabase Conn ()
{
Mongoclient = new Mongoclient (IP, port);
db = Mongoclient.getdatabase (dbname);

return DB;

}

/**query Data from Database
*
* @param collection_name
* @param document for query criteria
* @param document_projection to return only the fields you need
* @return
* Crud Method Please see http://mongodb.github.io/mongo-java-driver/3.0/driver/getting-started/quick-tour/
*/

@SuppressWarnings ("Unchecked")
Public finditerable<document> querydata (String collection_name,bson document,int flag) {
Collection_name is the collection name to query
mongocollection<document> coll = db.getcollection (collection_name);

if (flag==0) {
0 means query All
Cursor=coll.find (document);
}
else if (flag==1) {
1 means querying only one piece of data
Cursor= (finditerable<document>) coll.find (Document). First ();

}

else if (flag==2) {
2 means no query criteria
Cursor=coll.find ();

}
return cursor;
}

@SuppressWarnings ("Unchecked")
Public finditerable<document> querydata (String collection_name,bson document,bson document_projection,int Flag ){

mongocollection<document> coll = db.getcollection (collection_name);
if (flag==0) {
0 means query All
Cursor=coll.find (document). projection (document_projection);
}

else if (flag==1) {
1 means querying only one piece of data
Cursor= (finditerable<document>) coll.find (Document). Projection (document_projection). First ();
}

else if (flag==2) {
2 means no query criteria
Cursor=coll.find (). projection (document_projection);
}
return cursor;
}



/**insert data to database;
*
* Crud Method Please see http://mongodb.github.io/mongo-java-driver/3.0/driver/getting-started/quick-tour/
*/
public void InsertData (String collection_name,arraylist<document> documents) {


mongocollection<document> coll = db.getcollection (collection_name);

Coll.insertmany (documents);


}


/**
*
* Update data to Database
*
* Filter filters the data that needs to be updated with this filter
* Update what needs to be updated
*
*
*
* Crud Method Please see http://mongodb.github.io/mongo-java-driver/3.0/driver/getting-started/quick-tour/
*/


Public long UpdateData (String Collection_name,bson filter,bson update,int flag) {


mongocollection<document> coll = db.getcollection (collection_name);
if (flag==0) {
Update_count=coll.updatemany (filter, update). Getmodifiedcount ();
return update_count;
}

else if (flag==1) {

Update_count=coll.updateone (filter, update). Getmodifiedcount ();
return update_count;
}
return update_count;
}




/**
*
* Remove data from database
*
* Filter filters the data to be deleted via this filter
* Crud Method Please see http://mongodb.github.io/mongo-java-driver/3.0/driver/getting-started/quick-tour/
*/

Public long DeleteData (String collection_name,bson filter,int flag) {

mongocollection<document> coll = db.getcollection (collection_name);
if (flag==0) {

Delete_count=coll.deletemany (filter). Getdeletedcount ();
return delete_count;
}
else if (flag==1) {

Delete_count=coll.deleteone (filter). Getdeletedcount ();
return delete_count;

}

return delete_count;
}

}

Dbunit

Package com.auto.test.testcase;

Import java.util.ArrayList;

Import org.bson.Document;
Import Com.auto.test.basedata.DBConfig;
Import Com.auto.test.dbmodel.DBConnUtil;
Import Com.mongodb.Block;
Import com.mongodb.client.FindIterable;

/**
* Class Description
*
* @author LUOZT
* @date New September 19, 2016
*/
public class Dbunit_test implements dbconfig{

String collection_name= "Test_api";

public static void Main (string[] args) {
TODO auto-generated Method Stub
Dbunit_test test=new dbunit_test ();
}

Public Dbunit_test () {

Dbconnutil dbhelp=new Dbconnutil (mongo_ip,mongo_port,mongo_dbname);
Dbhelp.conn ();


/**
* Insert
* If database or collection not exist, it is created by Automatic
*/

Arraylist<document> documents=new arraylist<document> ();

Document Document=new document ("name", "MONGODB2")
. Append ("type", "Database2")
. Append ("Count", "112")
. Append ("Info", New Document ("X", 2032). Append ("Y", 1022));

Documents.Add (document);

Dbhelp.insertdata (collection_name, documents);



/**
* Query
*
*/
Document Query_document=new document ("Info.x", New Document ("$GT", 300));
Document Fiter_document=new document ("name", 1). Append ("Count", 1);

Finditerable<document> Iterable=dbhelp.querydata (collection_name, query_document, fiter_document, 0);
Iterable.foreach (New block<document> () {
@Override
public void apply (Final Document document) {
System.out.println (document);
}
});

/**
* Update
*
*/

Document Update_document=new document ("name", "MONGODB2");
Document Update_option=new document ("$set", New Document ("Info.y", 2000));
Long Update_count=dbhelp.updatedata (collection_name, update_document, update_option, 0);
System.out.println (Update_count);



/**
*
* Delete
*
*
*/
Document Delete_document=new document ("type", "database3");

Long Delete_count=dbhelp.deletedata (collection_name, delete_document, 0);
System.out.println ("Delete Count is" +delete_count+ "");

}




}

Java uses the latest API to manipulate MongoDB