src/com/wgh/action/StartExam.java

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package com.wgh.action;

import javax.servlet.http.*;

import org.apache.struts.action.*;

import com.wgh.actionForm.LessonForm;
import com.wgh.actionForm.MoreSelect;
import com.wgh.actionForm.QuestionsForm;
import com.wgh.actionForm.TaoTiForm;
import com.wgh.core.ChStr;
import com.wgh.dao.LessonDAO;
import com.wgh.dao.StartExamDAO;
import com.wgh.dao.TaoTiDAO;
import java.util.*;

public class StartExam extends Action {
	private StartExamDAO startExamDAO = null;
	ChStr chStr=new ChStr();

	public StartExam() {
		this.startExamDAO = new StartExamDAO();
	}
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		String action = request.getParameter("action");
		//System.out.println("获取的查询字符串：" + action);
		if ("startExam".equals(action)) {
			return startExam(mapping, form, request, response);
		}else if("submitTestPaper".equals(action)){
			return submitTestPaper(mapping,form,request,response);
		}else if("showStartTime".equals(action)){//显示考试计时
			return showStartTime(mapping,form,request,response);
		}else if("showRemainTime".equals(action)){//显示考试时间
			return showRemainTime(mapping,form,request,response);
		}else{
			request.setAttribute("error", "操作失败！");
			return mapping.findForward("error");
		}
	}
	//计时
	private ActionForward showStartTime(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		HttpSession session = request.getSession();
		String startTime=session.getAttribute("startTime").toString();
		long a=Long.parseLong(startTime);
		long b=new java.util.Date().getTime();
		int h=(int)Math.abs((b-a)/3600000);
		String hour=chStr.formatNO(h,2);
		int m=(int)(b-a)%3600000/60000;
		String minute=chStr.formatNO(m,2);
		int s=(int)((b-a)%3600000)%60000/1000;
		String second=chStr.formatNO(s,2);
		String time=hour+":"+minute+":"+second;
		request.setAttribute("showStartTime",time);
		return mapping.findForward("showStartTime");
	}
	//计算剩余时间
	private ActionForward showRemainTime(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {