testdemo1.java

Hibernate中的映射例子

package test.m2m.demo;
import java.util.Iterator;

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

import test.m2m.pojo.Employee;
import test.m2m.pojo.Project;
import test.m2m.sf.HibernateSessionFactory;
public class TestDemo1 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//查询Project
		Session session=HibernateSessionFactory.getSession();
		Transaction tx=session.beginTransaction();
		Project pro=(Project)session.get(Project.class, 1);
		Iterator it=pro.getEmployees().iterator();
		System.out.print("项目："+pro.getPname()+"\n成员：");
		while(it.hasNext()){
			Employee emp=(Employee)it.next();
			System.out.print(emp.getEname()+"  ");
		}
		tx.commit();
		session.close();
		System.out.println();
		//查询Employee
		session=HibernateSessionFactory.getSession();
		tx=session.beginTransaction();
		Employee emp=(Employee)session.get(Employee.class, 3);
		it=emp.getProjects().iterator();
		System.out.print("雇员："+emp.getEname()+"\n参与项目：");
		while(it.hasNext()){
			Project proj=(Project)it.next();
			System.out.print(proj.getPname()+"  ");
		}
		tx.commit();
		session.close();
	}

}