Hibernate's Gettransaction () and BeginTransaction ()

Session.gettransaction () only gets a transaction instance based on the session, but does not start it

Session.begintransaction () calls its begin () method after acquiring a transaction

(1)

Session = Hibernateutil.getsession ();//This is the operation to open the session
Session.begintransaction ();//This is the operation to turn on transaction
Session.save (user);//This is the operation of putting data into a first-level cache session
Session.gettransaction (). commit ();//Here is the statement that really interacts with the database

(2)

Session session=hibernatetools.getsession ();
Transaction tx=session.begintransaction ();

Session.save (user);

Tx.commit ();
Session.close ();

Such as:

public static void Main (string[] args) throws ParseException {
Get configuration file
Configuration configuration = new configuration (). Configure ();
Registering a Service object
Standardserviceregistrybuilder Serviceregistrybuilder = new Standardserviceregistrybuilder ();
Standardserviceregistry serviceregistry = serviceregistrybuilder.applysettings (Configuration.getproperties ()). Build ();
Get Sessionfactory
Sessionfactory sessionfactory = configuration.buildsessionfactory (serviceregistry);
Get session
Session session = Sessionfactory.opensession ();
Open transaction
Session.begintransaction ();
Start Operation *************//
1. Get the user data with ID 1 using the Get method
Commodity getcommodity = (commodity) session.get (Commodity.class, 1);
System.out.println ("Date Created:" + getcommodity.getcreatedate () + "description:" + getcommodity.getdescribe () + "Date Modified:" + Getcommodity.getmodifydate () + "name:" + getcommodity.getname ());

Date date = new Date (0);
String stringdate = "2019-05-07";
Date date = new SimpleDateFormat ("Yyyy-mm-dd"). Parse (stringdate);

2. Adding goods
Commodity newcommodity = new Commodity (date, "Electrical 1", date, "Rice cooker 2");
Session.save (newcommodity);

3. By deleting
Commodity getCommodity1 = (commodity) session.load (Commodity.class, 2);
Session.delete (getCommodity1);
Session.gettransaction (). commit ();

4. Change
Commodity getCommodity2 = (commodity) session.get (Commodity.class, 1);
Getcommodity2.setname ("wash basin");
Session.update (GetCommodity2);
Session.gettransaction (). commit ();
End Operation *************//


Commit a transaction
Session.gettransaction ();
Close session
Session.close ();
Close Sessionfactory
Sessionfactory.close ();
}

Again such as:

Import org.hibernate.Session;
Import Org.hibernate.SessionFactory;
Import Org.hibernate.boot.registry.StandardServiceRegistry;
Import Org.hibernate.boot.registry.StandardServiceRegistryBuilder;
Import org.hibernate.cfg.Configuration;

Import Online.shixun.shop.model.User;

public class Hibernatedemo {

public static void Main (string[] args) {
Get configuration file
Configuration configuration = new configuration (). Configure ();
Registering a Service object
Standardserviceregistrybuilder Serviceregistrybuilder = new Standardserviceregistrybuilder ();
Standardserviceregistry serviceregistry = serviceregistrybuilder.applysettings (Configuration.getproperties ()). Build ();
Get Sessionfactory
Sessionfactory sessionfactory = configuration.buildsessionfactory (serviceregistry);
Get Session
Session session = Sessionfactory.opensession ();
Open transaction
Session.begintransaction ();

Start Data Manipulation ***************//

1. Get the user data with ID 1 using the Get method
User GetUser = (user) Session.get (user.class, 1);
System.out.println ("Get username/password/age:" + getuser.getname () + "/" + Getuser.getpassword () + "/" + getuser.getage ());

2. Use the Load method to get user data with ID 1
User Loaduser = (user) session.load (user.class, 1);
System.out.println ("Load username/password/age:" + loaduser.getname () + "/" + Loaduser.getpassword () + "/" + loaduser.getage ());

3. Use the Save method to add user data (execute the following statement and use the Database client tool to query the table for new data additions)
User NewUser = New User ("Wuhan", "Innovaee", 16);
Session.save (NewUser);

4. Modify GetUser data using the Saveorupdate method
Getuser.setname ("Light practical training! ");
Session.saveorupdate (GetUser);

5. Delete getUser data using the Delete method
Session.delete (GetUser);

End data Operation ***************//

Commit a transaction
Session.gettransaction (). commit ();
Close Sessin
Session.close ();
Close Sessionfactory
Sessionfactory.close ();
}
}

Hibernate's Gettransaction () and BeginTransaction ()