Hibernate entity Type mapping file

1. Write the hibernate mapping file. Entity types are converted to tables in the database

Written according to the entity type.

Entity type User.java

Package Cn.wwh.www.hibernate.dd.property;import java.util.arrays;import java.util.date;/** * Class Function: * * * @author Skiff *@ Version 1.0 *@ created: 2014-8-17 pm 08:05:30 */public class User {private Integer id;private String name;//Name Private Boole an gender; True indicates a male. False indicates the female private Date birthday; Birthday Private String desc; A large paragraph description, up to 5000 words private byte[] photo; Photo/** * @return The ID */public Integer getId () {return ID;} /** * @param id The ID to set */public void SetId (Integer id) {this.id = ID;} /** * @return The name */public String getName () {return name;} /** * @param name the name to set */public void SetName (String name) {this.name = name;} /** * @return The Gender */public Boolean Isgender () {return gender;} /** * @param gender the gender to set */public void Setgender (Boolean gender) {This.gender = gender;} /** * @return The birthday */public Date getbirthday () {return birthday;} /** * @param birthday The birthday to set */public void Setbirthday (Date birthday) {this.birthday = Birthday;} /** * @return The desc */public String GetDesc () {return desc;} /** * @param desc the desc to set */public void Setdesc (String desc) {this.desc = desc;} /** * @return The photo */public byte[] Getphoto () {return photo;} /** * @param photo The photo to set */public void Setphoto (byte[] photo) {This.photo = photo;} @Overridepublic String toString () {return "User [birthday=" + birthday + "\ n desc=" + desc + "\ n gender=" + gender + "\ n ID = "+ id +" \ n name= "+ name +" \ n photo= "+ arrays.tostring (photo) +"] ";}}

2. mapping file User.hbm.xml:

<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE hibernate-mapping Public "-//hibernate/hibernate mapping DTD 3.0//en" "Http://hibernate.sourceforge. Net/hibernate-mapping-3.0.dtd ">
3. master configuration file:
Hibernate.cfg.xml
<? 
 
 
 XML version= "1.0" encoding= "UTF-8"? 
 
 ><! DOCTYPE hibernate-configuration Public "-//hibernate/hibernate configuration DTD 3.0//en" "http// Hibernate.sourceforge.net/hibernate-configuration-3.0.dtd "> 
 
                        Create-drop: Create a table at startup and delete the table before exiting.
<span style= "White-space:pre" ></span> update: If the table structure is inconsistent, create or update it. Validate: Validates the table structure at startup, assuming that the exception is not thrown.       --><!--own initiative to create a data table--><property name= "Hbm2ddl.auto" >update</property><!--SQL statement showing data manipulation --><property name= "Show_sql" >true</property><!--formatted display SQL statement--><property name= "Format_sql ">true</property><!--3. Import the mapping profile--><mapping resource=" cn/wwh/www/hibernate/dd/property/ User.hbm.xml "/></session-factory>

4. Data in the test database:

Package Cn.wwh.www.hibernate.dd.property;import Java.io.fileinputstream;import Java.util.date;import Org.hibernate.session;import Org.hibernate.sessionfactory;import Org.hibernate.cfg.configuration;import org.junit.test;/** * Function of class: * * * @author Skiff * @version 1.0 *@ created: 2014-8-17 pm 08:10:38 */public class Testsqlbyxml {Priv Ate static sessionfactory sessionfactory = new Configuration (). Configure (). Buildsessionfactory ();//Save @testpublic Void Testsave () throws Exception {Session session = Sessionfactory.opensession (); session.begintransaction ();//----------- ----------------------------//Read the picture from the hard drive. Then store the database fileinputstream in = new FileInputStream ("f:/psb.jpg"); byte[] photo = new Byte[in.available ()];in.read (photo); In.close ();//Prepare the object User user = new user (); User.setname ("skiff"); User.setgender (true); User.setbirthday (new Date ()); User.setdesc ("Skiff is a positive child, striving for the dream ..."); User.setphoto (photo);//save Session.save (user);//------------------- --------------------session.gettransaction (). commit (); sEssion.close ();} Get @testpublic void Testget () throws Exception {Session session = Sessionfactory.opensession (); Session.begintransaction ();//---------------------------------------User user = (user) Session.get (user.class, 1); System.out.println (User.getname ()); System.out.println (User.isgender ()); System.out.println (User.getbirthday ()); System.out.println (User.getdesc ()); System.out.println (User.getphoto ());//system.out.println (user);//--------------------------------------- Session.gettransaction (). commit (); Session.close ();}}



 
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Hibernate entity Type mapping file