java在线考试系统(源码)

package com.hs.action; import java.sql.SQLException; import java.util.*; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; 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.hs.actionForm.ExamForm; import com.hs.dao.StartExamDAO; import com.hs.core.*; public class StartExam extends Action { private StartExamDAO startExamDAO=null; private ChStr chStr=new ChStr(); public StartExam() { this.startExamDAO=new StartExamDAO(); } @Override public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { String action=request.getParameter("action"); HttpSession session=request.getSession(); if("startExam".equals(action)) { try { ExamForm examForm=(ExamForm)form; int examTime=startExamDAO.getExamTime(examForm.getType()); session.setAttribute("examTime", examTime); String student=session.getAttribute("student").toString(); float ret=startExamDAO.examResult(examForm.getType(), student); if(ret>0) { request.setAttribute("dealNull","您已经考过此门科目，请重新选择科目或直接关闭窗口结束考试!" ); return mapping.findForward("dealNull"); } else return startExam(mapping,form,request,response); } catch (SQLException e) { e.printStackTrace(); } } else if("showStartTime".equals(action)) { return showStartTime(mapping,form,request,response); } else if("showRemainTime".equals(action)) { return showRemainTime(mapping,form,request,response); } else if("submitTestPaper".equals(action)) { return submitTestPaper(mapping,form,request,response); //return mapping.findForward("dealNull"); } request.setAttribute("dealNull", "系统出错或者您的操作有误!"); return mapping.findForward("dealNull"); } private ActionForward submitTestPaper(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { HttpSession session=request.getSession(); String student=session.getAttribute("student").toString(); ExamForm examForm=(ExamForm) form; String type=session.getAttribute("type").toString(); String rightAnswer; float mark=0; String[] answer=examForm.getAnswerArr(); int[] id=examForm.getIdArr(); float everyMark=100/answer.length; for(int i=0;i<answer.length;i++) { rightAnswer=startExamDAO.getRightAnswer(id[i], type); if(rightAnswer.equals(answer[i])) { mark=mark+everyMark; } } int ret=startExamDAO.saveResult(student,type,mark); if(ret>0) { request.setAttribute("submitTestPaperOK", "试卷已经提交，您本次考试的成绩为:"+Math.round(mark)+"分"); return mapping.findForward("submitTestPaperOK"); } else { request.setAttribute("dealNull", "提交试卷出错!请和管理员联系!"); return mapping.findForward("dealNull"); } } 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"); } private ActionForward startExam(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws SQLException { HttpSession session=request.getSession(); ExamForm examForm=(ExamForm)form; String student=session.getAttribute("student").toString(); if(session.getAttribute("student")==null||session.getAttribute("student").equals("")) { request.setAttribute("dealNull", "你还没有登陆，请登陆后再进行考试！"); return mapping.findForward("dealNull"); } else { String type=examForm.getType(); session.setAttribute("type", type); int num=startExamDAO.getQuestionNum(type); int count=startExamDAO.count(type); if(num>count) { request.setAttribute("dealNull", "试卷题目设置出错，请和管理员联系!"); return mapping.findForward("dealNull"); } else { examForm.setSize(num); Set set=startExamDAO.getQuestions(num,type); Iterator it=set.iterator(); it.hasNext(); ExamForm ef=(ExamForm)it.next(); request.setAttribute("set", set); request.setAttribute("type", type); // request.setAttribute("num", num); // request.setAttribute("count", count); session.setAttribute("startTime", new Date().getTime()); return mapping.findForward("testPaper"); } } } private ActionForward showRemainTime(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 i=20; int examTime=Integer.valueOf(session.getAttribute("examTime").toString()); long r=examTime*60000-(b-a-1000);//设置时间 int h=(int)Math.abs(r/3600000); String hour=chStr.formatNO(h,2); int m=(int)(r)%3600000/60000; String minute=chStr.formatNO(m,2); int s=(int)((r)%3600000)%60000/1000; String second=chStr.formatNO(s,2); String time=hour+":"+minute+":"+second; request.setAttribute("showRemainTime",time); return mapping.findForward("showRemainTime"); } }