package?com.wgh.action;

import?java.util.List;

import?javax.servlet.http.*;

import?org.apache.struts.action.*;
import?com.wgh.actionForm.LessonForm;
import?com.wgh.dao.LessonDAO;

public?class?Lesson?extends?Action?{
	private?LessonDAO?lessonDAO?=?null;

	public?Lesson（）?{
		this.lessonDAO?=?new?LessonDAO（）;
	}
	public?ActionForward?execute（ActionMapping?mapping?ActionForm?form
			HttpServletRequest?request?HttpServletResponse?response）?{
		String?action?=?request.getParameter（“action“）;
		System.out.println（“獲取的查詢字符串：“?+?action）;
		if?（action?==?null?||?““.equals（action））?{
			return?mapping.findForward（“error“）;
		}?else?if?（“l(fā)essonQuery“.equals（action））?{
			return?lessonQuery（mapping?form?request?response）;

		}?else?if?（“l(fā)essonAdd“.equals（action））?{
			return?lessonAdd（mapping?form?request?response）;
		}?else?if?（“l(fā)essonDel“.equals（action））?{
			return?lessonDel（mapping?form?request?response）;
		}else?if（“selectLesson“.equals（action））{
			return?selectLesson（mapping?form?request?response）;
		}else?if（“ready“.equals（action））{
			return?ready（mapping?form?request?response）;
		}
		request.setAttribute（“error“?“操作失??！“）;
		return?mapping.findForward（“error“）;
	}

	//?查詢課程信息
	private?ActionForward?lessonQuery（ActionMapping?mapping?ActionForm?form
			HttpServletRequest?request?HttpServletResponse?response）?{
		request.setAttribute（“l(fā)essonQuery“?lessonDAO.query（0））;
		return?mapping.findForward（“l(fā)essonQuery“）;
	}

	//?添加課程
	private?ActionForward?lessonAdd（ActionMapping?mapping?ActionForm?form
			HttpServletRequest?request?HttpServletResponse?response）?{
		LessonForm?lessonForm?=?（LessonForm）?form;
		int?ret?=?lessonDAO.insert（lessonForm）;
		System.out.println（“返回值ret：“?+?ret）;
		if?（ret?==?1）?{
			return?mapping.findForward（“l(fā)essonAdd“）;
		}?else?if?（ret?==?2）?{
			request.setAttribute（“error“?“該課程已經(jīng)添加！“）;
			return?mapping.findForward（“error“）;
		}?else?{
			request.setAttribute（“error“?“添加課程失??！“）;
			return?mapping.findForward（“error“）;
		}
	}
	//?刪除課程
	private?ActionForward?lessonDel（ActionMapping?mapping?ActionForm?form
			HttpServletRequest?request?HttpServletResponse?response）?{
		LessonForm?lessonForm?=?（LessonForm）?form;
		int?ret?=?lessonDAO.delete（lessonForm）;
		if?（ret?==?0）?{
			request.setAttribute（“error“?“刪除課程失??！“）;
			return?mapping.findForward（“error“）;
		}?else?{
			return?mapping.findForward（“l(fā)essonDel“）;
		}
	}
	//在線考試時(shí)選擇課程
	private?ActionForward?selectLesson（ActionMapping?mapping?ActionForm?form
			HttpServletRequest?request?HttpServletResponse?response）?{?
		HttpSession?session?=?request.getSession（）;
		String?stu=session.getAttribute（“student“）.toString（）;	//獲取準(zhǔn)考證號
		List?list=lessonDAO.query（stu）;	//查詢包括考試題目的課程列表，但不包括已經(jīng)考過的科目
		if（list.size（）<1）{
			return?mapping.findForward（“noenLesson“）;
		}else{
			request.setAttribute（“l(fā)essonList“l(fā)ist）;
			return?mapping.findForward（“selectLesson“）;
		}
	}
	//準(zhǔn)備考試