Eclipse+hibernate5+jdk8（第一课）

1.导入hibernate中的required包

2.核心配置文件

<?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>
    <property name="hbm2ddl.auto">update</property>
  <property name="dialect">
    org.hibernate.dialect.Oracle9Dialect
  </property>
  <property name="connection.url">
    jdbc:oracle:thin:@127.0.0.1:1521:orcl
  </property>
  <property name="connection.username">scott</property>
  <property name="connection.password">tiger</property>
  <property name="connection.driver_class">
    oracle.jdbc.driver.OracleDriver
  </property>
  <property name="myeclipse.connection.profile">oracle</property>
  <property name="show_sql">true</property>
  <property name="format_sql">true</property>
  
  <!-- 本地事务 -->
<!--   <property name="current_session_context_class">thread</property>     -->
  <mapping class="com.wxh.dto.People"/>   
    
  </session-factory>
</hibernate-configuration>

3.dto(使用注解的方式)

package com.wxh.dto;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;

@Entity
public class People {
  
  
  private Integer pid;
  
  
  private String name;
  
  private String sex;
  private String phone;
  private String address; 
  
  public People() {
  } 
  
  public People(String name, String sex, String phone, String address) {
    super();
    this.name = name;
    this.sex = sex;
    this.phone = phone;
    this.address = address;
  }

  @Id
  @GeneratedValue(strategy=GenerationType.AUTO,generator="mygen")
  @SequenceGenerator(name="mygen",sequenceName="auto_pid")
  public Integer getPid() {
    return pid;
  }
  public void setPid(Integer pid) {
    this.pid = pid;
  }
  
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getSex() {
    return sex;
  }
  public void setSex(String sex) {
    this.sex = sex;
  }
  public String getPhone() {
    return phone;
  }
  public void setPhone(String phone) {
    this.phone = phone;
  }
  public String getAddress() {
    return address;
  }
  public void setAddress(String address) {
    this.address = address;
  }
  
}

4.hibernatesessionfactory（获取session的工具类）

package com.wxh.sessionfactory;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

public class HibernateSessionFactory {
  private static Session session;
  
  private static SessionFactory sessionFactory;
  
  static{
    
    StandardServiceRegistry reg=new StandardServiceRegistryBuilder().configure().build();
    
    sessionFactory=new MetadataSources(reg).buildMetadata().buildSessionFactory();  
    
  }
  
  //返回session对象
  public static Session getSession(){
    if(session==null || !session.isOpen()){
      if(sessionFactory==null){
        rebuildSessionFactory();
      }
      session=(sessionFactory!=null)?sessionFactory.openSession():null;
    }   
    return session;
  }

  //重构sessionFactory
  private static void rebuildSessionFactory() {
    StandardServiceRegistry reg=new StandardServiceRegistryBuilder().configure().build();
    sessionFactory=new MetadataSources(reg).buildMetadata().buildSessionFactory();
  }
  
  //返回sessionFactory
  public static SessionFactory getSessionFactory(){
    if(sessionFactory==null){
      rebuildSessionFactory();
    }
    return sessionFactory;
  }
}

5.测试类

package test;

import org.hibernate.Session;

import com.wxh.dto.People;
import com.wxh.sessionfactory.HibernateSessionFactory;

public class Test {

  public static void main(String[] args) {
    People p=new People("张三", "男", "123456","武汉");
    
    Session session=HibernateSessionFactory.getSession();
    
    session.beginTransaction();
    session.save(p);
    session.getTransaction().commit();
    session.close();    
  }

}