?? classesdaoimp.java
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package com.stuman.dao.imp;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import com.stuman.dao.ClassesDAO;
import com.stuman.dao.hibernate.HibernateUtil;
import com.stuman.domain.Classes;
public class ClassesDAOImp implements ClassesDAO{
private static Log log = LogFactory.getLog(ClassesDAOImp.class);
//獲得班級信息列表
public List getClasses() {
try {
//獲得Session
Session s = HibernateUtil.currentSession();
//開始事務
HibernateUtil.beginTransaction();
//執行操作
List results = s.createQuery("from Classes cla").list();
//提交事務
HibernateUtil.commitTransaction();
//關閉Session
HibernateUtil.closeSession();
//返回結果
if (results != null && results.size() > 0) {
return results;
}
} catch (HibernateException e) {
log.fatal(e);
}
return null;
}
//刪除指定班級編號的班級信息
public boolean deleteClassesByID(String id) {
try {
Session s = HibernateUtil.currentSession();
HibernateUtil.beginTransaction();
Classes cla = (Classes) s.load(Classes.class, id);
System.out.println(cla.getId());
s.delete(cla);
HibernateUtil.commitTransaction();
HibernateUtil.closeSession();
return true;
} catch (HibernateException e) {
log.fatal(e);
}
return false;
}
//通過班級編號獲得班級信息
public Classes getClassesByID(String id) {
try {
Session s = HibernateUtil.currentSession();
HibernateUtil.beginTransaction();
Classes cla = (Classes) s.load(Classes.class, id);
HibernateUtil.commitTransaction();
HibernateUtil.closeSession();
return cla;
} catch (HibernateException e) {
log.fatal(e);
}
return null;
}
//更新班級的信息
public boolean updateClasses(Classes cla) {
try {
Session s = HibernateUtil.currentSession();
HibernateUtil.beginTransaction();
s.update(cla);
System.out.println("update Classes id =" + cla.getId());
HibernateUtil.commitTransaction();
HibernateUtil.closeSession();
return true;
} catch (HibernateException e) {
log.fatal(e);
}
return false;
}
//保存某班級的信息
public boolean saveClasses(Classes cla) {
try {
Session s = HibernateUtil.currentSession();
HibernateUtil.beginTransaction();
s.saveOrUpdate(cla);
System.out.println("save Classes id =" + cla.getId());
HibernateUtil.commitTransaction();
HibernateUtil.closeSession();
return true;
} catch (HibernateException e) {
log.fatal(e);
}
return false;
}
}
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