documentutil.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

/*
 * DocumentUtil.java
 *
 * Created on 2006年9月6日, 上午4:04
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package model.library.hibernate;
import dbservice.hibernate.HibernateService;
import java.util.List;
import net.sf.hibernate.HibernateException;
import net.sf.hibernate.Session;
import net.sf.hibernate.Transaction;
/**
 *
 * @author Administrator
 */
public class DocumentUtil {
    public static boolean insert(Document doc) {
        Transaction transaction = null;
        Session session = null;
        boolean b = false;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            session.save(doc);
            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, Document document) {
        Transaction transaction = null;
        Session session = null;
        boolean b = false;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            Document doc = new Document();
            session.load(doc, Integer.valueOf(id));
            
            doc.setName(document.getName());
            doc.setSummary(document.getSummary());
            doc.setContent(document.getContent());
            doc.setRemarks(document.getRemarks());
            
            session.update(doc);
            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 List find(String hql, int firstPage, int maxSize) {
        List list = null;
        Transaction transaction = null;
        Session session = null;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            list = HibernateService.execQuery(hql, firstPage, maxSize);
            transaction.commit();
        }
        catch (HibernateException he) {
            he.printStackTrace();
            HibernateService.rollbackTransaction(transaction);
            list = null;
        }
        catch (Exception e) {
            e.printStackTrace();
            list = null;
        }
        finally {
            HibernateService.closeSession(session);
            return list;
        }
    }
    
    public static List findAll() {
        List list = null;
        list = HibernateService.execQuery("from Document");
        return list;        
    }
    
    public static Document find(String id) {
        Document doc = null;
        Transaction transaction = null;
        Session session = null;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            doc = new Document();
            session.load(doc, Integer.valueOf(id));
            transaction.commit();
        }
        catch (HibernateException he) {
            he.printStackTrace();
            HibernateService.rollbackTransaction(transaction);
            doc = null;
        }
        catch (Exception e) {
            e.printStackTrace();
            doc = null;
        }
        finally {
            HibernateService.closeSession(session);
            return doc;
        }
    }
    
    public static boolean delete(String id) {
        Transaction transaction = null;
        Session session = null;
        boolean b = false;
        try {
            session = HibernateService.getSession();
            transaction = session.beginTransaction();
            Document doc = new Document();
            session.load(doc, Integer.valueOf(id));
            doc.getHistories().clear();
            session.delete(doc);
            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;
        }
    }
    
}