test.java

Hibernate中的映射例子

package test.self.demo;

import org.hibernate.Session;
import org.hibernate.Transaction;

import test.self.pojo.Categories;
import test.self.sf.HibernateSessionFactory;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Test test=new Test();
		//test.save();
		test.delete();
	}
	public void save(){
		//初始化
		Categories foodCategories=new Categories();
		Categories fruitCategories=new Categories();
		Categories vegetableCategories=new Categories();
		Categories appleCategories=new Categories();
		Categories orangeCategories=new Categories();
		Categories tomatoCategories=new Categories();
		foodCategories.setName("food");
		foodCategories.setId(1);
		fruitCategories.setName("fruit");
		fruitCategories.setId(2);
		appleCategories.setName("apple");
		appleCategories.setId(3);
		orangeCategories.setName("orange");
		orangeCategories.setId(4);
		vegetableCategories.setName("vegetable");
		vegetableCategories.setId(5);
		tomatoCategories.setName("tomato");
		tomatoCategories.setId(6);
		//食物与蔬菜水果关联
		foodCategories.getChildcategorieses().add(fruitCategories);
		foodCategories.getChildcategorieses().add(vegetableCategories);
		fruitCategories.setParentcategories(foodCategories);
		vegetableCategories.setParentcategories(foodCategories);
		//水果与苹果橘子关联
		fruitCategories.getChildcategorieses().add(appleCategories);
		fruitCategories.getChildcategorieses().add(orangeCategories);
		appleCategories.setParentcategories(fruitCategories);
		orangeCategories.setParentcategories(fruitCategories);
		//蔬菜与土豆关联
		vegetableCategories.getChildcategorieses().add(tomatoCategories);
		tomatoCategories.setParentcategories(vegetableCategories);
		Session session=HibernateSessionFactory.getSession();
		Transaction tx=session.beginTransaction();
		try{
			session.save(foodCategories);
			tx.commit();
		}catch(Exception e){
			tx.rollback();
			e.printStackTrace();
		}finally{
			HibernateSessionFactory.closeSession();
		}
		System.out.println("All saved!");
	}
	public void delete(){
		Session session=HibernateSessionFactory.getSession();
		Transaction tx=session.beginTransaction();
		try{
			Categories foodCategories=(Categories)session.get(Categories.class, 1);
			session.delete(foodCategories);
			tx.commit();
		}catch(Exception e){
			tx.rollback();
			e.printStackTrace();
		}finally{
			HibernateSessionFactory.closeSession();
		}
		System.out.println("All deleted!");
	}

}