A simple example of rookie learning hibernate--

One,Hibernatedevelopment.

The previous blog has introduced the persistence layer framework of the development process, the type of persistence layer framework.

in order to be able to use Hibernate high-speed, we first explain a simple Hibernate Application Examples Hibernate_first .

Second, the development process.

1. First Create a new Hibernate_first project in Myeclipce, and then create the new project folder as:

2. Configure the Hibernate environment.

3. Writing Persistent classes User.java

Package Com.bjpowernode.hibernate;import Java.util.date;public class User {private string id;private string name; private string password;private date createtime;private date expiretime;public String getId () {return ID;} public void SetId (String id) {this.id = ID;} Public String GetName () {return name;} public void SetName (String name) {this.name = name;} Public String GetPassword () {return password;} public void SetPassword (String password) {this.password = password;} Public Date Getcreatetime () {return createtime;} public void Setcreatetime (Date createtime) {this.createtime = Createtime;} Public Date Getexpiretime () {return expiretime;} public void Setexpiretime (Date expiretime) {this.expiretime = Expiretime;}}

4. Write the build map file User.hbm.xml.

<?xml version= "1.0"? ><! DOCTYPE hibernate-mapping Public "-//hibernate/hibernate mapping DTD 3.0//en" "http://hibernate.sourceforge.net/ Hibernate-mapping-3.0.dtd ">


5. Write the hibernate.cfg.xml file. 
<! DOCTYPE hibernate-configuration Public "-//hibernate/hibernate configuration DTD 3.0//en" "http// Hibernate.sourceforge.net/hibernate-configuration-3.0.dtd ">
6. Generate the table's class Exportdb.java.
Package Com.bjpowernode.hibernate;import Org.hibernate.cfg.configuration;import org.hibernate.tool.hbm2ddl.schemaexport;/** * Generate DDL for HBM * @author Administrator * */public class Exportdb {public static V OID Main (string[] args) {//default read hibernate.cfg.xml file configuration cfg = new configuration (). Configure (); Schemaexport export = new Schemaexport (CFG); Export.create (true, True);}}


7. The above six steps have built up the table below and we'll save the data. Create a new Client.java class to deposit one data. 
The code is as follows:
Package Com.bjpowernode.hibernate;import Java.util.date;import Org.hibernate.session;import Org.hibernate.sessionfactory;import Org.hibernate.cfg.configuration;public class Client {public static void main ( String[] (args) {//Read Hibernate.cfg.xml file configuration cfg = new configuration (). Configure ();// Establish Sessionfactorysessionfactory factory = Cfg.buildsessionfactory ();//Get sessionsession session = Null;try {session = Factory.opensession ();//Open transaction session.begintransaction (); User user = new user (), User.setname ("Zhang San"), User.setpassword ("123"); User.setcreatetime (new Date ()); user.setexpiretime (New Date ());//Save User Object Session.save (user);//COMMIT Transaction session.gettransaction (). commit ();} catch (Exception e) {e.printstacktrace ();//ROLLBACK TRANSACTION session.gettransaction (). rollback ();} finally {if (session! = NULL) {if (Session.isopen ()) {//close sessionsession.close ();}}}}



Third, summary.
a simple Hibernate The sample is coming out of the Hibernate This is a good example of how we can get started with this sample. 


 
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A simple example of rookie learning hibernate--