本文实例讲述了Hibernate的Annotation版Hello world实现方法。分享给大家供大家参考,具体如下:
需要引入的包:hibernate-commons-annotations-4.0.4.Final.jar
由于我使用的是:hibernate-release-4.3.5.Final,在required目录下已经有了。
bean:
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import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table (name= "teacher" )
public class Teacher {
private int id;
private String name;
private String title;
@Id
public int getId() {
return id;
}
public void setId( int id) {
this .id = id;
}
@Column (name= "name" )
public String getName() {
return name;
}
public void setName(String name) {
this .name = name;
}
@Column (name= "title" )
public String getTitle() {
return title;
}
public void setTitle(String title) {
this .title = title;
}
}
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对应的hibernate.cfg.xml文件:
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<? xml version = '1.0' encoding = 'utf-8' ?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
< hibernate-configuration >
< session-factory >
<!-- Database connection settings -->
< property name = "connection.driver_class" >com.mysql.jdbc.Driver</ property >
< property name = "connection.url" >jdbc:mysql://localhost/hibernate</ property >
< property name = "connection.username" ></ property >
< property name = "connection.password" ></ property >
<!-- JDBC connection pool (use the built-in) -->
<!--
<property name="connection.pool_size">1</property>
-->
<!-- SQL dialect -->
< property name = "dialect" >org.hibernate.dialect.MySQLDialect</ property >
<!-- Enable Hibernate's automatic session context management -->
< property name = "current_session_context_class" >thread</ property >
<!-- Disable the second-level cache -->
< property name = "cache.provider_class" >org.hibernate.cache.internal.NoCacheProvider</ property >
<!-- Echo all executed SQL to stdout -->
< property name = "show_sql" >true</ property >
<!-- Drop and re-create the database schema on startup -->
<!--
<property name="hbm2ddl.auto">update</property>
-->
< mapping resource = "com/hibernate/model/Student.hbm.xml" />
< mapping class = "com.hibernate.model.Teacher" />
</ session-factory >
</ hibernate-configuration >
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测试类:
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import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import com.huxing.hibernate.model.Student;
import com.huxing.hibernate.model.Teacher;
public class StudentTest {
public static void main(String[] args) {
Student a = new Student();
a.setId( 123 );
a.setAge( 32 );
a.setName( "hello hibernate!" );
Teacher tea = new Teacher();
tea.setId( 4 );
tea.setName( "mysql" );
tea.setTitle( "high" );
Configuration cfg = new AnnotationConfiguration();
SessionFactory cf = cfg.configure().buildSessionFactory();
Session session = cf.openSession();
session.beginTransaction();
session.save(tea);
session.getTransaction().commit();
session.close();
cf.close();
}
}
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注意:代码省略了包路径。
其他方面:
1.注解可以加在属性上,也可以加在get方法上。
2.注解的mapping和xml配置的xml的不同!一个是resource,一个是class。
希望本文所述对大家Hibernate框架程序设计有所帮助。