studentdaohibernate.java

《JSP网站开发典型模块与实例精讲》一书光盘源码

package org.appfuse.dao.hibernate;

import java.util.List;

import org.springframework.orm.ObjectRetrievalFailureException;

import org.appfuse.dao.*;
import org.appfuse.model.Student;
import org.appfuse.util.exception.AppDAOException;
import org.appfuse.model.RoleAuth;

/**
 * @author user
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class StudentDAOHibernate
    extends BaseDAOHibernate
    implements StudentDAO {
    public Student getStudent(int studentid) throws AppDAOException {
        Student student = (Student) getHibernateTemplate().get(Student.class,
            new Integer(studentid));

        if (student == null) {
            throw new ObjectRetrievalFailureException(Student.class,
                new Integer(studentid));
        }
        log.debug("int StudentDAOHibernate: getStudent");
        return student;
    }

    public List getStudents(Student student) throws AppDAOException {
        log.debug("int StudentDAOHibernate: getStudents");
        return getHibernateTemplate().find(
            "from Student");
    }

    public void saveStudent(final Student student) throws AppDAOException {
        log.debug("int StudentDAOHibernate: saveStudent");
        getHibernateTemplate().saveOrUpdate(student);
        getHibernateTemplate().flush();
    }

    public void removeStudent(int studentid) throws AppDAOException {
        log.debug("int StudentDAOHibernate: removeStudent");
        Student student = getStudent(studentid);
        getHibernateTemplate().delete(student);
    }

}