Hibernate 使用 Annotation 2（主键生成方式）

hibernate.cfg.xml配置文件：

<?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">

<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">root</property>
        <property name="connection.password">root</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">100</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.NoCacheProvider</property>
		
        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

		<property name="format_sql">true</property>
		
        <!-- Drop and re-create the database schema on startup -->
        <!--<property name="hbm2ddl.auto">create</property>-->
	<mapping class="com.jlee02.createId.Jlee"/>

    </session-factory>

</hibernate-configuration>

 

Jlee.java代码：

 

package com.jlee02.createId;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.TableGenerator;
@Entity
@Table(name="T_JLEE")
@TableGenerator(
		name = "myKey" ,
		table = "KEY_TABLE" ,
		pkColumnName = "pk_key" ,
		valueColumnName = "pk_value" ,
		pkColumnValue = "T_JLEE" ,
		allocationSize = 1 ,//取完数值后数值步进的数值
		initialValue = 1
		)
//@SequenceGenerator(name="mySeq" , sequenceName="mySeq_DB")适用于Oracle 自定义sequence在数据库中的名字
public class Jlee {

	private long id ;
	private String name ;
	private String phone ;
	private int age ;
	/**
	 * @return the id
	 */
	@Id
	@GeneratedValue(strategy=GenerationType.TABLE , generator="myKey")
//	@GeneratedValue(strategy=GenerationType.SEQUENCE , generator="mySeq")主键生成方式为自定义 Sequence
	public long getId() {
		return id;
	}
	/**
	 * @param id the id to set
	 */
	public void setId(long id) {
		this.id = id;
	}
	/**
	 * @return the name
	 */
	@Column(name="name" , length=32)
	public String getName() {
		return name;
	}
	/**
	 * @param name the name to set
	 */
	public void setName(String name) {
		this.name = name;
	}
	/**
	 * @return the phone
	 */
	@Column(name="phone" , length=18)
	public String getPhone() {
		return phone;
	}
	/**
	 * @param phone the phone to set
	 */
	public void setPhone(String phone) {
		this.phone = phone;
	}
	/**
	 * @return the age
	 */
	@Column(name="age")
	public int getAge() {
		return age;
	}
	/**
	 * @param age the age to set
	 */
	public void setAge(int age) {
		this.age = age;
	}
	
}

 

JleeTest.java代码：

package com.jlee02.createId;

import junit.framework.TestCase;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class JleeTest extends TestCase {

	public void testJlee(){
		SessionFactory sf = new AnnotationConfiguration().configure().buildSessionFactory() ;
		Session session = sf.getCurrentSession() ;
		session.beginTransaction() ;
		
		Jlee jlee = new Jlee() ;
		jlee.setName("JLee") ;
		jlee.setAge(23) ;
		jlee.setPhone("12123123123") ;
		
		session.save(jlee) ;
		
		session.getTransaction().commit() ;
		
	}
	
	//相当于hbm2ddl 设为 create
	public void testExport(){
		new SchemaExport(new AnnotationConfiguration().configure()).create(false, true) ;
	}
	
}