newstservice.java

在线信息发布系统。在Eclipse下进行开发结合了struts等主流技术

package service;

import java.util.*;
import po.news.*;
import hibernate.*;
import org.hibernate.*;

public class NewstService {
	
	/*
	 * 新闻发布:添加一条新闻
	 */
	public static boolean addNews(Newst news)
	{
		NewstDAO dao = new NewstDAO();
		
		try{
			Session session=dao.getSession();
			Transaction tx=session.beginTransaction();

			dao.save(news);
			session.flush();
			
			tx.commit();
			
			return true;
			
		}catch(HibernateException e){
			return false;
		}finally{
			try  { 
		        dao.getSession().close();
		      } catch  (Exception e) { 
		      }
		}
	}

	/*
	 * 新闻列表显示
	 */
	public static List newsList(Newst news)
	{		
		NewstDAO dao = new NewstDAO();
		
		try{
			List list=dao.findByExample(news);
			
			return list;
			
		}catch(HibernateException e){
			return null;
		}finally{
			try  { 
		        dao.getSession().close();
		      } catch  (Exception e) { 
		      }
		}
	}
	
	/*
	 * 新闻内容显示
	 */
	public static Newst getNewsContent(Integer newstId)
	{
		NewstDAO dao = new NewstDAO();
		
		try{
			Newst news=dao.findById(newstId);
			
			return news;
			
		}catch(HibernateException e){
			return null;
		}finally{
			try  { 
		        dao.getSession().close();
		      } catch  (Exception e) { 
		      }
		}
	}
	
	
	/*
	 * 新闻查询功能,返回新闻列表
	 */
	public static List newsSearch(String author, String title)
	{
		NewstDAO dao = new NewstDAO();
		
		try{			
			List newsList=dao.findByHQL(author,title);
			
			return newsList;
			
		}catch(HibernateException e){
			return null;
		}finally{
			try  { 
		        dao.getSession().close();
		      } catch  (Exception e) { 
		      }
		}
	}

}