adlastresultaction.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.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

import allBeans.LastStudentTittle;
import allBeans.LstBean;
import allDAOFactory.ILastStudentTittleDAO;
import allBeans.Students;
import allDAOFactory.IStudentDAO;
import allBeans.Tittles;
import allDAOFactory.ITittleDAO;

import com.yourcompany.struts.form.AdlastresultForm;

/** 
 * MyEclipse Struts
 * Creation date: 07-22-2008
 * 
 * XDoclet definition:
 * @struts.action path="/adlastresult" name="adlastresultForm" input="/Administrators/adlastresult.jsp" scope="request" validate="true"
 */
public class AdlastresultAction 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) {
		AdlastresultForm adlastresultForm = (AdlastresultForm) form;// TODO Auto-generated method stub
		
		String la_stid=adlastresultForm.getLa_stid();
		Integer la_tiid=adlastresultForm.getLa_tiid();
		
		ActionErrors errors=new ActionErrors();
		
		ILastStudentTittleDAO lstdao=new ILastStudentTittleDAO();
		LastStudentTittle lst=new LastStudentTittle();
		IStudentDAO stdao=new IStudentDAO();
		Students student=new Students();
		ITittleDAO tidao=new ITittleDAO();
		Tittles tittle=new Tittles();		
		
		boolean b_error=false;
		
		if(la_stid==null || la_stid.equals("")) //输入的学生学号不能为空
		{
			errors.add("la_stid",new ActionMessage("adlst.la_stid.wrong"));
			b_error=true;
		}
		if(la_tiid==null || la_tiid.equals("")) //输入的题目编号不能为空
	    {
		   errors.add("la_tiid",new ActionMessage("adlst.la_tiid.wrong"));
		   b_error=true;
		}

		student=stdao.stget(la_stid);
		if(student==null)         //学生学号应该在学生表中已经存在，否则错误
		{
		   errors.add("adadminisadid",new ActionMessage("adadmin.isadid.wrong"));
		   b_error=true;
		}
		lst=lstdao.lstget(la_stid);
		if(lst!=null)          //学生学号不应该在最后选定表中存在，否则不能添加这个学生的关系
		{
		   errors.add("adadminisadid",new ActionMessage("adadmin.isadid.wrong"));
		   b_error=true;
		}

		tittle=tidao.tiget(la_tiid);
		if(tittle==null)           //题目编号应该已经在题目表中存在，否则错误
		{
		   errors.add("adadminisadid",new ActionMessage("adadmin.isadid.wrong"));
		   b_error=true;
		}
		
		if(!b_error)
		{
			lst=new LastStudentTittle();
			lst.setLaPrior("4");
			lst.setLaStid(la_stid);
			lst.setLaThid(la_tiid);
			lstdao.lstsave(lst);
			
			/*
			//将学生的选题数目置为1
			student=stdao.stget(la_stid);
			student.setStTisum(1);
			stdao.stupdate(student);
			
			//重新给题目的被选人数赋值
			tittle=tidao.tiget(la_tiid);
			List list=lstdao.lstgetbytiid(la_tiid);
			tittle.setTiStsum(list.size());
			tidao.tiupdate(tittle);
			*/
			
			adlastresultForm.setLa_stid("");
			adlastresultForm.setLa_tiid(null);
		}
		else
			this.saveErrors(request, errors);
		
		List list=lstdao.lstget();
		List lastlist=new ArrayList();
		LstBean temp=null;
		Iterator it=list.iterator();
		while(it.hasNext())
		{
			temp=new LstBean();
			Object[] result=(Object[])it.next();
			temp.setStid(result[0].toString());
			temp.setStname(result[1].toString());
			temp.setTiid(result[2].toString());
			temp.setTiname(result[3].toString());
			lastlist.add(temp);
			
		}
		request.setAttribute("lstlist", lastlist);
		return mapping.findForward("toadlastresult");
	}
}