Java Operations MongoDB: Connect & Add & Delete & change & check

1. Connect

① Way One

Mongoclientoptions.builder Builder = Mongoclientoptions.builder ();//various detailed configurations can be made through builderMongoclientoptions myoptions =Builder.build (); ArrayList<ServerAddress> serveraddresslist =NewArrayList (); ServerAddress Record=NewServerAddress ("localhost", 27017);//IP, PortServeraddresslist.add (record); //user name, default library name, passwordMongocredential credential = mongocredential.createcredential ("TestUser", "Test", "Testpwd". ToCharArray ()); Mongoclient mongoclient=NewMongoclient (serveraddresslist, credential, myoptions);

② Way Two

        // user name, password, IP, port, default library name        String SURI = String.Format ("Mongodb://%s:%[email protected]%s:%d/%s", "TestUser", "testpwd", "localhost", 27017, "test ");         New Mongoclient (new Mongoclienturi (SURI));

③ mode three (can be used when permission verification mode is not enabled)

        // login without user name and password (easy for beginners, avoid overly complex settings)        New Mongoclient ("localhost", 27017);

2. Intermediate steps (Create a collection to store data, equivalent to table tables)

        Mongodatabase dbTest = mongoclient.getdatabase ("test");         // If it does not exist, increase the collection        Mongocollection<document> collection = Dbtest.getcollection ("test_collection");         if NULL {            dbtest.createcollection ("test_collection");        }

3.insert

        //Insert Add DataDocument doc =NewDocument (); Doc.append ("Name", "name1"); Doc.append ("Age", 20); //Collection.insertone (DOC);//add a piece of data//add more than one piece of dataDocument doc2 =NewDocument (); Doc2.append ("Name", "name2"); Doc2.append ("Age", 30); ArrayList dataList=NewArrayList ();        Datalist.add (DOC);        Datalist.add (DOC2); Collection.insertmany (dataList);

4.delete

        // Delete Deletes data        New Basicdbobject ("Name", "name1");         // Delete a bar         //  // Delete multiple strips

5.update

        //Update modifies dataBasicdbobject Updateoldsql =NewBasicdbobject ("Name", "name2"); //update One piece of dataBasicdbobject Updatenewonesql =NewBasicdbobject ("$set",NewBasicdbobject ("Name", "name1")); //Collection.updateone (Updateoldsql,updatenewonesql); //update more than one dataBasicdbobject Updatenewmanysql =NewBasicdbobject ("$set",NewBasicdbobject ("Name", "name1"). Append ("Age", 66));//Modify multiple fieldsCollection.updatemany (Updateoldsql, updatenewmanysql);

6.query

        // Querying Data        New Basicdbobject ("Name", "name1");        Finditerable// Here you can do sort and filter operations        mongocursor<document> cursor =  Queryrst.iterator ();          while (Cursor.hasnext ()) {            System.out.println (Cursor.next ()); // output each row of data        }

Above.

Java Operations MongoDB: Connect & Add & Delete & change & check