newstypeutil.java

J2EE电子商务系统开发从入门到精通---基于Struts和Hibernate技术实现

/*
 * NewstypeUtil.java
 *
 * Created on 2006年6月1日, 上午7:05
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package model.newspress.hibernate;
import dbservice.hibernate.HibernateService;
import java.util.HashSet;
import net.sf.hibernate.HibernateException;
import net.sf.hibernate.Session;
import net.sf.hibernate.Transaction;
/**
 *
 * @author Administrator
 */
public class NewstypeUtil {
    public static boolean insert(Newstype type) {
        Transaction transaction = null;
        Session session = null;
        boolean b = false;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            type.setNewspresses(new HashSet());
            session.save(type);
            transaction.commit();
            b = true;
        }
        catch (HibernateException he) {
            he.printStackTrace();
            HibernateService.rollbackTransaction(transaction);
            b = false;
        }
        catch (Exception e) {
            e.printStackTrace();
            b = false;
        }
        finally {
            HibernateService.closeSession(session);
            return b;
        }
    }
    
    public static boolean update(String id, Newstype type) {
        Transaction transaction = null;
        Session session = null;
        boolean b = false;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            Newstype nt = new Newstype();
            session.load(nt, Byte.valueOf(id));
            nt.setRemarks(type.getRemarks());
            nt.setName(type.getName());
            session.update(nt);
            transaction.commit();
            b = true;
        }
        catch (HibernateException he) {
            he.printStackTrace();
            HibernateService.rollbackTransaction(transaction);
            b = false;
        }
        catch (Exception e) {
            e.printStackTrace();
            b = false;
        }
        finally {
            HibernateService.closeSession(session);
            return b;
        }
    }
    
    public static Newstype find(String id) {
        Newstype type = null;
        Transaction transaction = null;
        Session session = null;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            type = new Newstype();
            session.load(type, Byte.valueOf(id));
            transaction.commit();
        }
        catch (HibernateException he) {
            he.printStackTrace();
            HibernateService.rollbackTransaction(transaction);
            type = null;
        }
        catch (Exception e) {
            e.printStackTrace();
            type = null;
        }
        finally {
            HibernateService.closeSession(session);
            return type;
        }
    }
    
    public static boolean delete(String id) {
        Transaction transaction = null;
        Session session = null;
        boolean b = false;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            Newstype type = new Newstype();
            session.load(type, Byte.valueOf(id));
            type.getNewspresses().clear();
            session.delete(type);
            transaction.commit();
            b = true;
        }
        catch (HibernateException he) {
            he.printStackTrace();
            b = false;
        }
        catch (Exception e) {
            e.printStackTrace();
            b = false;
        }
        finally {
            HibernateService.closeSession(session);
            return b;
        }
    }
    
    public static boolean addNewspresses(String id, Newspress press) {
        Transaction transaction = null;
        Session session = null;
        boolean b = false;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            Newstype type = new Newstype();
            session.load(type, Byte.valueOf(id));
            press.setNewstype(type);
            session.update(type);
            transaction.commit();
            b = true;
        }
        catch (HibernateException he) {
            he.printStackTrace();
            HibernateService.rollbackTransaction(transaction);
            b = false;
        }
        catch (Exception e) {
            e.printStackTrace();
            b = false;
        }
        finally {
            HibernateService.closeSession(session);
            return b;
        }
    }
}