driver.java

用JSP+hibernate做的一个MVC的论坛,结构清晰,可扩展性强,适合二次开发!

package org.hibernate.forum;

import java.util.ArrayList;
import java.util.Date;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;

import net.sf.hibernate.FetchMode;
import net.sf.hibernate.FlushMode;
import net.sf.hibernate.LockMode;
import net.sf.hibernate.Session;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.Transaction;
import net.sf.hibernate.cfg.Configuration;
import net.sf.hibernate.cfg.Environment;
import net.sf.hibernate.expression.Example;
import net.sf.hibernate.expression.Expression;
import net.sf.hibernate.expression.MatchMode;


public class Driver {

	private SessionFactory factory;

	/**
	 * viewPosts
	 */
	public void viewPosts(Long sellerId) throws Exception {
		System.out.println("Viewing posts with the id: " + sellerId);

		Session s = factory.openSession();
		Transaction tx=null;

		try {
			tx = s.beginTransaction();

			List list = s.createCriteria(Post.class)
				.add( Expression.eq("id", sellerId) )
				.list();

			if (list.size()==0) throw new IllegalArgumentException("No posts for the given id: " + sellerId);

			Post post = (Post) list.get(0);
			System.out.println(
				"ID: " + post.getId() + " - " + post.getPostAuthor() +
				", MSG: " + post.getPostMsg()
			);

			tx.commit();
		}
		catch (Exception e) {
			if (tx!=null) tx.rollback();
			throw e;
		}
		finally {
			s.close();
		}
	}


	/**
	 * createTestPosts
	 */
	public void createTestPosts() throws Exception {
		System.out.println("Setting up a test post");

		Session s = factory.openSession();
		Transaction tx = s.beginTransaction();

		Category cat = new Category();

		cat.setCategoryMsg("Rock Bands");
		cat.setDescription("Talk about your favorite rock bands here!");

    	s.save(cat);

    	Topic top = new Topic();

        Long lg = cat.getId();
        top.setTopicMsg("Van Halen is back!");
        top.setTopicAuthor("Joe User");
        top.setCategoryID(lg);

        s.save(top);


        Post post = new Post(top.getId());

        post.setPostDate(new java.sql.Date(System.currentTimeMillis()));
        post.setPostMsg("They will be in my town today!!!");
        post.setPostAuthor("Joe User");

        s.save(post);


		tx.commit();
		s.close();


        viewPosts(post.getId());
		System.out.println("Done");
	}



	public static void main(String[] args) throws Exception {

		final Driver test = new Driver();


		Configuration cfg = new Configuration()
			.addClass(Category.class)
			.addClass(Post.class)
			.addClass(Topic.class);

		test.factory = cfg.buildSessionFactory();

		test.createTestPosts();

		test.factory.close();

	}
}