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Lesson.java
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Lesson.java
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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("获取的查询字符串:" + action);
if (action == null || "".equals(action)) {
return mapping.findForward("error");
} else if ("lessonQuery".equals(action)) {
return lessonQuery(mapping, form, request, response);
} else if ("lessonAdd".equals(action)) {
return lessonAdd(mapping, form, request, response);
} else if ("lessonDel".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", "操作失败!");
return mapping.findForward("error");
}
// 查询课程信息
private ActionForward lessonQuery(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
request.setAttribute("lessonQuery", lessonDAO.query(0));
return mapping.findForward("lessonQuery");
}
// 添加课程
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("lessonAdd");
} else if (ret == 2) {
request.setAttribute("error", "该课程已经添加!");
return mapping.findForward("error");
} else {
request.setAttribute("error", "添加课程失败!");
return mapping.findForward("error");
}
}
// 删除课程
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", "删除课程失败!");
return mapping.findForward("error");
} else {
return mapping.findForward("lessonDel");
}
}
//在线考试时选择课程
private ActionForward selectLesson(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
HttpSession session = request.getSession();
String stu=session.getAttribute("student").toString(); //获取准考证号
List list=lessonDAO.query(stu); //查询包括考试题目的课程列表,但不包括已经考过的科目
if(list.size()<1){
return mapping.findForward("noenLesson");
}else{
request.setAttribute("lessonList",list);
return mapping.findForward("selectLesson");
}
}
//准备考试
private ActionForward ready(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
LessonForm lessonForm = (LessonForm) form;
System.out.println("课程ID:"+lessonForm.getID()+lessonForm.getName());
HttpSession session = request.getSession();
session.setAttribute("lessonID",String.valueOf(lessonForm.getID())); //查询选择的课程ID
return mapping.findForward("ready");
}
}