hibernate--Simple increase, delete, change, check operation

Ideas:

1. Import Hibernate jar Package

2. Import the MySQL jar package

3. Create a Database

4. Creating Java Entity classes

5. Writing the Hibernate.cfg.xml configuration file

6. Writing DAO classes

Directory:

Data sheet:

Entity class:

 PackageOnline.shixun.model;Importjava.util.Date;ImportJavax.persistence.Column;Importjavax.persistence.Entity;ImportJavax.persistence.GeneratedValue;ImportJavax.persistence.GenerationType;Importjavax.persistence.Id;Importjavax.persistence.Table;/*** Entity class *@authorTom **/@Entity @table (name= "Commodity") Public classCommodity {@Id @GeneratedValue (strategy= generationtype.identity)//primary key self-increment    PrivateInteger ID; @Column (Name= "CreateDate")    PrivateDate CreateDate;//Date Created@Column (Name= "described")    PrivateString describe;//Product Description@Column (Name= "Modifydate")    PrivateDate modifydate;//Date Modified@Column (Name= "Name")    PrivateString name;//Product Name//constructor Function     Publiccommodity () {}//with parameter constructors     PublicCommodity (Date createdate,string describe,date modifydate,string name) { This. CreateDate =CreateDate;  This. describe =describe;  This. modifydate =modifydate;  This. Name =name; }     PublicInteger getId () {returnID; }     Public voidsetId (Integer id) { This. ID =ID; }     PublicDate getcreatedate () {returnCreateDate; }     Public voidsetcreatedate (Date createdate) { This. CreateDate =CreateDate; }     PublicString Getdescribe () {returndescribe; }     Public voidSetdescribe (String describe) { This. describe =describe; }     PublicDate getmodifydate () {returnmodifydate; }     Public voidsetmodifydate (Date modifydate) { This. modifydate =modifydate; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; } @Override PublicString toString () {return"Commodity [id=" + ID + ", createdate=" + CreateDate + ", describe=" + describe + ", modifydate=" + modifyd Ate + ", name=" + name + "]"; }        }

Hibernate.cfg.xml:

<?XML version= "1.0" encoding= "UTF-8"?><!DOCTYPE hibernate-configuration Public "-//hibernate/hibernate configuration DTD 3.0//en" "Http://www.hi Bernate.org/dtd/hibernate-configuration-3.0.dtd "><hibernate-configuration>    <session-factory>        <!--database connection four items Driverclass,url,username,password -        < Propertyname= "Hibernate.connection.driver_class">Com.mysql.jdbc.Driver</ Property>        < Propertyname= "Hibernate.connection.url">Jdbc:mysql://localhost:3306/qsx_shop?characterencoding=utf-8</ Property>        < Propertyname= "Hibernate.connection.username">Root</ Property>        < Propertyname= "Hibernate.connection.password">Root</ Property>                <!--Hibernate dialect, Hibernateh generates corresponding SQL statements based on the configured dialect -        < Propertyname= "Hibernate.dialect">Org.hibernate.dialect.MySQLDialect</ Property>                <!--whether to display SQL -        < Propertyname= "Hibernate.show_sql">True</ Property>                <!--whether to format SQL -        < Propertyname= "Hibernate.format_sql">True</ Property>                <!--Configure Data entity classes -        <Mappingclass= "Online.shixun.model.Commodity" />    </session-factory></hibernate-configuration>

DAO:

 Packageonline.shixun.test;//import java.sql.Date;Importjava.util.Date;Importjava.text.ParseException;ImportJava.text.SimpleDateFormat;Importorg.hibernate.Session;Importorg.hibernate.SessionFactory;ImportOrg.hibernate.boot.registry.StandardServiceRegistry;ImportOrg.hibernate.boot.registry.StandardServiceRegistryBuilder;Importorg.hibernate.cfg.Configuration;Importonline.shixun.model.Commodity; Public classHibernatedemo { Public Static voidMain (string[] args)throwsParseException {//Get configuration fileConfiguration Configuration =NewConfiguration (). Configure (); //registering a service objectStandardserviceregistrybuilder Serviceregistrybuilder =NewStandardserviceregistrybuilder (); Standardserviceregistry Serviceregistry=serviceregistrybuilder.applysettings (Configuration.getproperties ()). build (); //Get SessionfactorySessionfactory sessionfactory =configuration.buildsessionfactory (serviceregistry); //Get SessionSession session =sessionfactory.opensession (); //Open Transactionsession.begintransaction (); //************ start Operation *************//        //1. Get the user data with ID 1 using the Get methodCommodity 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=NewSimpleDateFormat ("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 transactionsession.gettransaction (); //Close SessionSession.close (); //Close SessionfactorySessionfactory.close (); }}

Hibernate profiles are loaded in the following two ways, as follows:

Use the following statement to load the default Hibernate profile (name: Hibernate.cfg.xml)

Configuration configuration = new configuration (). Configure ();
If you want to customize the Hibernate profile name, you need to use the following statement to load the configuration file

Configuration configuration = new configuration (). Configure ("My-hibernate.cfg.xml");

hibernate--Simple increase, delete, change, check operation