Java EE开发指南—基于Spring/Struts/Hibernate的实现 源码（第二部分）

package com.tes.action; import java.math.BigDecimal; import java.sql.Date; import java.text.NumberFormat; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Set; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; 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 org.apache.struts.action.ActionMessages; import org.apache.struts.action.DynaActionForm; import org.apache.struts.actions.DispatchAction; import com.tes.bean.Book; import com.tes.bean.Course; import com.tes.bean.Point; import com.tes.bean.Section; import com.tes.bean.Teacher; import com.tes.exception.NoBooksExistException; import com.tes.exception.NoPointExistException; import com.tes.exception.NoSectionExistException; import com.tes.exception.NoStudentEvaluateException; import com.tes.exception.PeopleNotExistException; import com.tes.service.iface.IStudentService; import com.tes.service.iface.ITeacherService; public class TeacherAction extends DispatchAction{ private ITeacherService teacherService; private IStudentService studentService; public ActionForward teacherLogin(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { //建立DynaDynaActionForm对象，用于从获取表单中的内容 DynaActionForm dform = (DynaActionForm)form; //获得教师输入的姓名和身份证号 String teacherName = dform.getString("teacherName"); String idcard = dform.getString("idcard"); try { Teacher teacher = new Teacher(); //对教师登陆进行验证 teacher = teacherService.teacherLogin(teacherName,idcard); //如果验证通过，将跳转到教师操作页面，验证失败将产生异常 request.getSession().setAttribute("teacherId",teacher.getId()); return mapping.findForward("TeacherView"); } catch (PeopleNotExistException e) { //建立ActionMessages对象 ActionMessages errors = new ActionMessages(); //将异常或错误信息存入ActionMessages对象errors中 errors.add(ActionMessages.GLOBAL_MESSAGE,new ActionMessage("error.peopleNotExist")); //把ActionMessages对象存入到request对象中 saveErrors(request,errors); //跳转到错误处理页面 return mapping.findForward("TeacherLogin"); } } public ActionForward goTeachedCourseView(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { //从Session对象中获得教师对象的OID Integer teacherId = (Integer)request.getSession().getAttribute("teacherId"); //建立课程列表对象 List courseList = new ArrayList(); //根据教师对象OID获得该教师所授课程列表 courseList = teacherService.teachedCourse(teacherId); //将课程列表对象和教师OID存入Request对象中 request.setAttribute("courseList",courseList); request.setAttribute("teacherId",teacherId); //跳转到显示教师所授课程的页面 return mapping.findForward("TeachedCourseView"); } public ActionForward goCreateCourse(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { //从Session对象中获得教师对象的OID Integer teacherId = (Integer)request.getSession().getAttribute("teacherId"); //建立教材列表对象 List bookList = new ArrayList(); //获得所有的教材 bookList = studentService.getAllBooks(); //将教材列表对象和教师对象分别存入到Request对象中 request.setAttribute("bookList",bookList); request.setAttribute("teacherId",teacherId); //跳转到建立课程页面 return mapping.findForward("CreateCourse"); } public ActionForward modifyCourse(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { Integer courseId ; //如果从Request对象中不能获得课程对象OID，就从Session对象中获得课程对象的OID if(request.getParameter("courseId")!=null){ courseId =Integer.valueOf(request.getParameter("courseId")); }else{ courseId =(Integer) request.getSession().getAttribute("courseId"); } //根据课程对象OID获得课程对象 Course course = new Course(); course = studentService.getCourse(courseId); //根据课程对象OID获得课程包含的所有教材列表 List bookList = studentService.getBooks(courseId); //将教材列表和课程对象存入Request对象中，用于页面显示 request.setAttribute("bookList",bookList); request.setAttribute("course",course); //将课程对象OID存入Session对象中 request.getSession().setAttribute("courseId",courseId); //跳转到修改课程页面 return mapping.findForward("ModifyCourse"); } public ActionForward saveCourse(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { //从页面表单中获得课程的相关输入信息 DynaActionForm dform = (DynaActionForm)form; String courseName = dform.getString("courseName"); Integer courseNumber = Integer.valueOf(dform.getString("courseNumber")); String courseDescription = dform.getString("courseDescription"); //建立课程对象，并把从表单中获得的课程信息存入课程对象 Course course = new Course(); course.setName(courseName); course.setCourseNumber(courseNumber); course.setDescription(courseDescription); //从页面中获得教师对象OID Integer teacherId =(Integer) request.getSession().getAttribute("teacherId"); //从页面中获得教师建立课程时所选的教材 String[] bookIds = request.getParameterValues("bookIds"); //保存课程对象 teacherService.saveCourse(teacherId,course,bookIds); //建立课程列表对象 List courseList = new ArrayList(); //获得教师所授课程列表 courseList = teacherService.teachedCourse(teacherId); //把课程列表存入Request对象中 request.setAttribute("courseList",courseList); //跳转到教师查看所授课程的页面 return mapping.findForward("TeachedCourseView"); } public ActionForward updateCourse(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { //从页面表单中获得修改后的课程信息 DynaActionForm dform = (DynaActionForm)form; String courseName = dform.getString("courseName"); String courseDescription = dform.getString("courseDescription"); Integer courseNumber =Integer.valueOf(dform.getString("courseNumber")); //从Session对象中获得课程对象OID Integer courseId = (Integer)request.getSession().getAttribute("courseId"); //修改课程对象中各个属性 Course course = new Course(); course = studentService.getCourse(courseId); course.setName(courseName); course.setDescription(courseDescription); course.setCourseNumber(courseNumber); //更新课程对象 studentService.updateCourse(course); //根据Session对象中的教师OID，获得教师所授课程列�