userlogic.java

这是用JSP 实现的一个学生选课系统,功能相对来说还是相当完备.

package com.student.logic;

import com.student.dao.HbmDAO;
import com.student.actionform.UserActionForm;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import com.student.vo.BaseInfo;
import com.student.assistvo.AssistVo;
import com.student.vo.User;
import com.student.dao.DAOException;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class UserLogic {
  private HbmDAO dao;
  private UserActionForm form;
  public UserLogic(UserActionForm form) {
    dao = new HbmDAO();
    dao.setAutoClose(false);
    this.form = form;
  }
  public void getUsers()
  {
      String str = "from User";
      List users = dao.list(str);
      form.setUsers(users);
  }
  public void initStudents()
  {
      ArrayList  avs =  new ArrayList();
      String str = "from BaseInfo";
       List students = dao.list(str);
       for (Iterator iter = students.iterator(); iter.hasNext(); )
       {
         BaseInfo item = (BaseInfo)iter.next();
         AssistVo av = new AssistVo();
         av.setTypeName(item.getStudentName());
         av.setTypeUID(item.getStudentUID());
         avs.add(av);
       }
       form.setStudents(avs);
  }
  public void addUser()
  {
   User user = new User();
   List students = dao.list("from BaseInfo");
   if(students.size()>0)
   {
      BaseInfo student = (BaseInfo)students.get(0);
      user.setStudentUID(student.getStudentUID());
      user.setUserName("");
      user.setPassWord("****");
      user.setUserUID(null);
      form.getUsers().add(user);
    }
  }
  public void saveUser()
  {
        List users = form.getUsers();
        for (Iterator iter = users.iterator(); iter.hasNext(); ) {
          User item = (User)iter.next();
          if(item.getUserUID().equals(new Long(0)))
          {
            item.setUserUID(null);
          }
          try {
            dao.store(item);
          }
          catch (DAOException ex) {
            ex.printStackTrace();
          }
        }
  }
  public void deleteUser()
  {
        Long uid = form.getDeleteUID();
        try {
          dao.remove(User.class, uid);
        }
        catch (DAOException ex) {
          ex.printStackTrace();
        }
  }
   public void closeDAO()
   {
         dao.closeSession();
         dao = null;
  }


}