thensurestudentaction.java

这是一个可以让学生选择自己喜欢的课题

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.yourcompany.struts.action;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.yourcompany.struts.form.ThensurestudentForm;

import allBeans.LastStudentTittle;
import allBeans.Selectst;
import allDAOFactory.IStudentDAO;
import allDAOFactory.ITittleDAO;
import allDAOFactory.IFirstStudentTittleDAO;
import allDAOFactory.ILastStudentTittleDAO;
/** 
 * MyEclipse Struts
 * Creation date: 08-04-2008
 * 
 * XDoclet definition:
 * @struts.action path="/thensurestudent" name="thensurestudentForm" input="/Teachers/thensurestudent.jsp" scope="request" validate="true"
 */
public class ThensurestudentAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		ThensurestudentForm thensurestudentForm = (ThensurestudentForm) form;// TODO Auto-generated method stub

		String thid=(String)request.getSession().getAttribute("userID"); //得到教师的id
		if(thid==null)
			return mapping.findForward("tologinth");
		
		String stiid=thensurestudentForm.getTiid();  //得到题目的id
		Integer tiid=0;
		if(stiid!=null)
		   tiid=Integer.parseInt(stiid);  //将题目的id转换成整型
		String stid1=thensurestudentForm.getStid1();  //得到学生1的id
		String stid2=thensurestudentForm.getStid2(); //得到学生2的id
		String stid3=thensurestudentForm.getStid3(); //得到学生3的id
		ITittleDAO tidao=new ITittleDAO();
		if(tidao.tiget(tiid)!=null)
		{
			//重新一次确定选题的学生，所以要将lst表中的关于这个tiid的关系先删除
			ILastStudentTittleDAO lstdao=new ILastStudentTittleDAO();
			IStudentDAO stdao=new IStudentDAO();
			List listdelete=lstdao.lstgetbytiid(tiid);
			for(int i=0;i<listdelete.size();i++)
			{
				String stiddelete=((LastStudentTittle)listdelete.get(i)).getLaStid();
				lstdao.lstdelete(stiddelete);
			}
			if(stid1!=null)
			{
				lstdao=new ILastStudentTittleDAO();
				IFirstStudentTittleDAO fstdao=new IFirstStudentTittleDAO();
				LastStudentTittle lst=lstdao.lstget(stid1);
				if(lst!=null)
				{
					lstdao.lstdelete(stid1);
				}
				lst=new LastStudentTittle();
				lst.setLaStid(stid1);
				lst.setLaThid(tiid);
				lst.setLaPrior(fstdao.fstgetbystandti(stid1, tiid).getFiPrior());
				lst.setLaWord(fstdao.fstgetbystandti(stid1, tiid).getFiWord());
				lstdao.lstsave(lst);
			}
			if(stid2!=null)
			{
				lstdao=new ILastStudentTittleDAO();
				IFirstStudentTittleDAO fstdao=new IFirstStudentTittleDAO();
				LastStudentTittle lst=lstdao.lstget(stid2);
				if(lst!=null)
				{
					lstdao.lstdelete(stid2);
				}
				lst=new LastStudentTittle();
				lst.setLaStid(stid2);
				lst.setLaThid(tiid);
				lst.setLaPrior(fstdao.fstgetbystandti(stid2, tiid).getFiPrior());
				lst.setLaWord(fstdao.fstgetbystandti(stid2, tiid).getFiWord());
				lstdao.lstsave(lst);
			}	
			if(stid3!=null)
			{
				lstdao=new ILastStudentTittleDAO();
				IFirstStudentTittleDAO fstdao=new IFirstStudentTittleDAO();
				LastStudentTittle lst=lstdao.lstget(stid3);
				if(lst!=null)
				{
					lstdao.lstdelete(stid3);
				}
				lst=new LastStudentTittle();
				lst.setLaStid(stid3);
				lst.setLaThid(tiid);
				lst.setLaPrior(fstdao.fstgetbystandti(stid3, tiid).getFiPrior());
				lst.setLaWord(fstdao.fstgetbystandti(stid3, tiid).getFiWord());
				lstdao.lstsave(lst);
			}
		}
		tidao=new ITittleDAO();
		List list=tidao.tigetst(thid); //得到这个教师的所有题目				
		List lastlist=new ArrayList();
		Iterator it=list.iterator();
		while(it.hasNext())
		{
			Selectst st=new Selectst();
			Object[] obj=(Object[])it.next();
			st.setTiid(Integer.parseInt(obj[0].toString()));  
			st.setTiname(obj[1].toString());			
			IFirstStudentTittleDAO fstdao=new IFirstStudentTittleDAO();
			Integer num=fstdao.fstgetbytiid(Integer.parseInt(obj[0].toString())).size(); //从预选表中计算出选此题的人数
			st.setStsum(num);
			ILastStudentTittleDAO lstdao=new ILastStudentTittleDAO();
			List listtemp=lstdao.lstgetbytiid(st.getTiid());//根据tittle 的id 得到它在lst中的列表					
			if(listtemp.size()>0)
			{
				IStudentDAO stdao=new IStudentDAO();
				int stsize=listtemp.size();
				String st1=((LastStudentTittle)listtemp.get(0)).getLaStid();
				String stn=""+stdao.stget(st1).getStName();
				for(int i=1;i<stsize;i++)
				{
					String studentid=((LastStudentTittle)listtemp.get(i)).getLaStid();
					stn+="<br>";
					stn+=stdao.stget(studentid).getStName();
				}
				st.setStname(stn);
				st.setIsdone("1");				    
			}
			else
				st.setIsdone("0");
			lastlist.add(st);				
		}
		request.setAttribute("lastlist", lastlist);
		return mapping.findForward("tothselectstudent");
		//System.out.println(tiid);
		//System.out.println("stid1 :"+stid1);
		//System.out.println("stid2 :"+stid2);
		//System.out.println("stid3 :"+stid3);
		//return null;
	}
}