Struts2上传下载正确的源代码

package com.StuOnline.service; import com.StuOnline.model.*; import com.StuOnline.util.HibernateUtils; import java.util.*; import org.hibernate.Session; public class NewsService { /* ***************************************************************** ***************************************************************** */ //list()方法——按时间读取所有新闻列表 @SuppressWarnings("unchecked") public static List<News> list(int newsClassId, int beginPage, int PageSize) { List<News> newsMessages = null; Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); newsMessages = (List<News>)session.createQuery("from News as n where n.newsSubmodule.newsClass.id = " + newsClassId + " and n.pubTag = true order by n.subDate desc") .setFirstResult(beginPage - 1).setMaxResults(PageSize).list(); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } // System.out.println("NewsService! list() id : " + newsClassId ); return newsMessages; } //newset()读取最新一条新闻的详细信息 public static News newest(int newsClassId) { News newsMessage = null; Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); newsMessage = (News)session.createQuery("from News as n where n.newsSubmodule.newsClass.id = " + newsClassId + " and n.pubTag=true order by n.subDate desc").list().get(0); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } System.out.println("NewsAction Newset() "); return newsMessage; } //click_all()方法——读取点击率高的新闻（不分子模块） @SuppressWarnings("unchecked") public static List<News> click_all(int newsClassId, int num) { List<News> newsMessages = null; Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); newsMessages = (List<News>)session.createQuery("from News as n where n.newsSubmodule.newsClass.id = " + newsClassId + " and pubTag=true order by n.clickRate desc").setMaxResults(num).list(); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } // System.out.println("NewsService click_all() id" + newsClassId); return newsMessages; } //click_part()方法——读取点击率高的新闻（子模块中的） @SuppressWarnings("unchecked") public static List<News> click_part(int newsSubmoduleId, int num) { List<News> newsMessages = null; Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); newsMessages = (List<News>)session.createQuery("from News as n where n.newsSubmodule.id = " + newsSubmoduleId + " and pubTag=true order by n.clickRate desc").setMaxResults(num).list(); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } // System.out.println("NewsService click_part() id" + newsSubmoduleId); return newsMessages; } //detail()方法——读取一条新闻的详细信息 public static News detail(int newsId) { News newsMessage = null; Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); newsMessage = (News)session.get(News.class, newsId); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } System.out.println("NewsService! detail()" + newsId); return newsMessage; } //kinds()方法 ——读取与本条信息同类别的信息 @SuppressWarnings("unchecked") public static List<News> kinds(int newsSubmoduleId, int num) { List<News> newsMessages = null; Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); newsMessages = (List<News>)session.createQuery("from News as n where n.newsSubmodule.id = " + newsSubmoduleId + " and pubTag=true order by n.subDate desc") .setMaxResults(num).list(); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } System.out.println("NewsService kinds() id" + newsSubmoduleId); return newsMessages; } /* ***************************************************************** ***************************************************************** */ //add()方法向数据库写入 一条新闻 public static void add(News news) { Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); session.save(news); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } System.out.println("NewsService add"); } //delete()方法删除一条新闻 public static void delete(int newsId) { Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); session.createQuery("delete from News where id=" + newsId).executeUpdate(); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } System.out.println("NewsService delete newsId :" + newsId ); } //public()发布一条新闻——修改发布标记，新闻已经存在 public static void release(int newsId) { Session session = null; try { session = HibernateUtils.getSession(); session.beginTransaction(); session.createQuery("update News n set n.pubTag=true where n.id=" + newsId).executeUpdate(); session.getTransaction().commit(); }catch (Exception e) { session.getTransaction().rollback(); e.printStackTrace(); } finally { HibernateUtils.closeSession(session); } System.out.println("NewsService release newsId :" + newsId); } }