A sample Hibernate Program

Source Code of FirstHibernateProgram.java

package com.t4b.demo.bookshop; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class FirstHibernateProgram { public static void main(String[] args) { Configuration configuration = new Configuration().configure(); SessionFactory factory = configuration.buildSessionFactory(); Session session = factory.openSession(); try { Publisher publisher = new Publisher(); publisher.setId(10l); publisher.setCode("X001"); publisher.setName("XXX University Press"); publisher.setAddress("Address 1"); session.save(publisher); publisher.setAddress("Address 2"); session.update(publisher); session.flush(); } catch (Exception e) { e.printStackTrace(); } finally { session.close(); } } }

Source Code of Publisher.java

package com.t4b.demo.bookshop; public class Publisher { private Long id; private String code; private String name; private String address; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } }

Source Code of Publisher.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"> <hibernate-mapping package="com.t4b.demo.bookshop"> <class name="Publisher" table="PUB"> <id name="id" type="long" column="ID"> <generator class="native" /> </id> <property name="code" type="string"> <column name="CODE" length="4" not-null="true" unique="true" /> </property> <property name="name" type="string"> <column name="PUBLISHER_NAME" length="100" not-null="true" /> </property> <property name="address" type="string"> <column name="ADDRESS" length="200" /> </property> </class> </hibernate-mapping>

Source Code of hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class"> com.mysql.jdbc.Driver </property> <property name="hibernate.connection.url"> jdbc:mysql://localhost:3306/hb_db </property> <property name="connection.username">root</property> <property name="connection.password">YOUR PASSWORD</property> <property name="show_sql">true</property> <property name="dialect"> org.hibernate.dialect.MySQLDialect </property> <property name="hibernate.hbm2ddl.auto">update</property> <property name="connection.autocommit">true</property> <!-- Mapping files --> <mapping resource="com/t4b/demo/bookshop/Publisher.hbm.xml" /> </session-factory> </hibernate-configuration>

Source Code of log4j.properties

### direct log messages to stdout ### log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target=System.out log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L - %m%n ### direct messages to file hibernate.log ### #log4j.appender.file=org.apache.log4j.FileAppender #log4j.appender.file.File=hibernate.log #log4j.appender.file.layout=org.apache.log4j.PatternLayout #log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L - %m%n log4j.rootLogger=error, stdout log4j.logger.org.hibernate.SQL=debug log4j.logger.org.hibernate.type=debug

Happy Exploring!