JavaWeb项目开发案例精粹-第3章在线考试系统-005action层

1.

 <?xml version="1.0" encoding="UTF-8" ?><!-- XML声明 -->
 <!DOCTYPE struts PUBLIC
  "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
  "http://struts.apache.org/dtds/struts-2.1.dtd"><!-- 指定Struts 2配置文件的DTD信息 -->
 <struts><!-- 根节点 -->
     <constant name="struts.i18n.encoding" value="gb2312"></constant>
     <package name="struts2" extends="struts-default">
          <action name="login" class="com.sanqing.action.LoginAction">
              <result name="studentSuccess" type="chain">getRandomSubject</result><!--进入考试页面-->
              <result name="teacherSuccess" type="redirect">/teacher/index.html</result><!--老师登录成功页面-->
              <result name="input">/login.jsp</result><!--登录失败页面-->
          </action>
          <action name="subjectAdd" class="com.sanqing.action.SubjectAddAction">
              <result name="success" type="redirect">/teacher/subjectAdd.jsp</result><!--重定向到试题添加页面-->
              <result name="input">/teacher/subjectAdd.jsp</result><!--请求转发到试题添加页面-->
          </action>
          <action name="subjectQuery" class="com.sanqing.action.QuerySubjectAction">
              <result name="success">/teacher/subjectManage.jsp</result><!--跳转到试题列表管理页面-->
          </action>
          <action name="subjectParticular" class="com.sanqing.action.SubjectParticularAction">
              <result name="success">/teacher/subjectShow.jsp</result><!--跳转到试题详细显示页面-->
          </action>
          <action name="subjectUpadateBefore" class="com.sanqing.action.SubjectUpdateBefore">
              <result name="success">/teacher/subjectUpdate.jsp</result><!--跳转到试题更新页面-->
          </action>
          <action name="subjectUpadate" class="com.sanqing.action.SubjectUpdateAction">
              <result name="success">/teacher/subjectUpdate.jsp</result><!--跳转到试题更新页面-->
          </action>
          <action name="subjectLikeQuery" class="com.sanqing.action.LikeQuerySubjectAction">
              <result name="success">/teacher/subjectManage.jsp</result><!--跳转到试题列表管理页面-->
          </action>
          <action name="getRandomSubject" class="com.sanqing.action.GetRandomSubject">
              <result name="success">/student/index.jsp</result><!--跳转到考试页面-->
          </action>
          <action name="submitExam" class="com.sanqing.action.SubmitExamAction">
              <result name="success">/student/examResult.jsp</result><!--跳转到考试页面-->
          </action>
          <action name="showSubjectAnswer" class="com.sanqing.action.ShowSubjectAnswer">
              <result name="success">/student/showAnswer.jsp</result><!--跳转到考试页面-->
          </action>
          <action name="queryStudentByName" class="com.sanqing.action.QueryStudentByName">
              <result name="success">/teacher/studentManage.jsp</result><!--跳转到学生管理页面-->
          </action>
          <action name="queryStudentByClass" class="com.sanqing.action.QueryStudentByClass">
              <result name="success">/teacher/studentManage.jsp</result><!--跳转到学生管理页面-->
          </action>
      </package>
 </struts>

2.

 package com.sanqing.action;

 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;

 /*
  * 获得随机试题
  */
 public class GetRandomSubject extends ActionSupport{
     private SubjectService subjectService = new SubjectServiceImpl();
     public String execute() throws Exception {
         List<Subject> subjects = subjectService.randomFindSubject(20);//获得试题记录
         HttpServletRequest request = ServletActionContext.getRequest();
         request.setAttribute("subjects", subjects);
         return SUCCESS;
     }
 }

3.

 package com.sanqing.action;

 import java.util.ArrayList;
 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;
 import com.sanqing.util.Page;
 import com.sanqing.util.PageResult;

 public class LikeQuerySubjectAction extends ActionSupport {
     private String subjectTitle;    //试题标题
     private int currentPage;        //当前页
     private SubjectService subjectService = new SubjectServiceImpl();

     public int getCurrentPage() {
         return currentPage;
     }

     public void setCurrentPage(int currentPage) {
         this.currentPage = currentPage;
     }

     public String getSubjectTitle() {
         return subjectTitle;
     }

     public void setSubjectTitle(String subjectTitle) {
         this.subjectTitle = subjectTitle;
     }

     public String execute() throws Exception {
         Page page = new Page();
         page.setEveryPage(10);//每页显示10条记录
         page.setCurrentPage(currentPage);//设置当前页
         PageResult pageResult = subjectService.likeQueryBySubjectTitle(subjectTitle, page);
         List<Subject> subjects = pageResult.getList();//获得试题记录
         List<Subject> newSubjects = new ArrayList<Subject>();//新的记录
         //给关键字标红
         for(Subject subject : subjects) {
             String newTitle = subject.getSubjectTitle().replaceAll(subjectTitle,
                         "<font color='red'>" + subjectTitle + "</font>");
             subject.setSubjectTitle(newTitle);
             newSubjects.add(subject);
         }

         page = pageResult.getPage();//获得分页信息
         HttpServletRequest request = ServletActionContext.getRequest();
         request.setAttribute("subjects", newSubjects);
         request.setAttribute("page", page);
         return SUCCESS;
     }
 }

4.

 package com.sanqing.action;

 import java.util.Map;

 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Student;
 import com.sanqing.service.StudentService;
 import com.sanqing.service.StudentServiceImpl;
 import com.sanqing.service.TeacherService;
 import com.sanqing.service.TeacherServiceImpl;

 public class LoginAction extends ActionSupport {
     private String id;             // 接受用户编号
     private String password;    // 接受用户密码
     private String role;        // 接受用户角色
     private StudentService studentService =
         new StudentServiceImpl();//学生业务逻辑组件引用
     private TeacherService teacherService =
         new TeacherServiceImpl();//教师业务逻辑组件引用

     public String getId() {
         return id;
     }

     public void setId(String id) {
         this.id = id;
     }

     public String getPassword() {
         return password;
     }

     public void setPassword(String password) {
         this.password = password;
     }

     public String getRole() {
         return role;
     }

     public void setRole(String role) {
         this.role = role;
     }

     public String execute() throws Exception {
         if("student".equals(role)) {//如果以学生身份登录
             if(studentService.allowLogin(id, password)) {
                 Student studentInfo = studentService.getStudentInfo(id);
                 //保存学生记录到session范围
                 Map session = ActionContext.getContext().getSession();
                 session.put("studentInfo", studentInfo);
                 return "studentSuccess";
             }else {
                 addActionError("该学生编号不存在，或者密码不正确!");
                 return this.INPUT;
             }
         }else {
             if(teacherService.allowLogin(id, password)) {
                 return "teacherSuccess";
             }else {
                 addActionError("该教师编号不存在，或者密码不正确!");
                 return this.INPUT;
             }
         }
     }
 }

5.

 package com.sanqing.action;

 import java.util.ArrayList;
 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Student;
 import com.sanqing.service.StudentService;
 import com.sanqing.service.StudentServiceImpl;

 public class QueryStudentByClass extends ActionSupport{
     private String sclass;
     private StudentService studentService = new StudentServiceImpl();
     public String getSclass() {
         return sclass;
     }

     public void setSclass(String sclass) {
         this.sclass = sclass;
     }
     public String execute() throws Exception {
         HttpServletRequest request = ServletActionContext.getRequest();
         List<Student> students = studentService.getStudentByClass(sclass);
         request.setAttribute("students", students);
         return this.SUCCESS;
     }

 }

6.

 package com.sanqing.action;

 import java.util.ArrayList;
 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Student;
 import com.sanqing.service.StudentService;
 import com.sanqing.service.StudentServiceImpl;

 public class QueryStudentByName extends ActionSupport{
     private String studentName;
     private StudentService studentService = new StudentServiceImpl();
     public String getStudentName() {
         return studentName;
     }
     public void setStudentName(String studentName) {
         this.studentName = studentName;
     }
     public String execute() throws Exception {
         HttpServletRequest request = ServletActionContext.getRequest();
         List<Student> students = studentService.getStudentByName(studentName);
         request.setAttribute("students", students);
         return this.SUCCESS;
     }

 }

7.

 package com.sanqing.action;

 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;
 import com.sanqing.util.Page;
 import com.sanqing.util.PageResult;

 public class QuerySubjectAction extends ActionSupport {
     private int currentPage;        //当前页
     private SubjectService subjectService = new SubjectServiceImpl();

     public int getCurrentPage() {
         return currentPage;
     }

     public void setCurrentPage(int currentPage) {
         this.currentPage = currentPage;
     }

     public String execute() throws Exception {
         Page page = new Page();
         page.setEveryPage(10);//每页显示10条记录
         page.setCurrentPage(currentPage);//设置当前页
         PageResult pageResult = subjectService.querySubjectByPage(page);
         List<Subject> subjects = pageResult.getList();//获得试题记录
         page = pageResult.getPage();//获得分页信息
         HttpServletRequest request = ServletActionContext.getRequest();
         request.setAttribute("subjects", subjects);
         request.setAttribute("page", page);
         return SUCCESS;
     }
 }

8.

 package com.sanqing.action;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;

 /*
  * 显示试题答案
  */
 public class ShowSubjectAnswer extends ActionSupport{
     private SubjectService subjectService = new SubjectServiceImpl();
     public String execute() throws Exception {
         List<Subject> subjects = new ArrayList<Subject>();//保存学生考过的题目
         HttpServletRequest request = ServletActionContext.getRequest();
         Map session = ActionContext.getContext().getSession();
         List<Integer> subjectIDs = (List<Integer>) session.get("subjectIDs");
         for(Integer subjectID : subjectIDs) {
             Subject subject = subjectService.showSubjectParticular(subjectID);//通过试题编号查找试题
             subjects.add(subject);
         }
         request.setAttribute("subjects", subjects);
         return SUCCESS;
     }
 }

9.

 package com.sanqing.action;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;

 //该Action用来接收试题参数，并调用业务逻辑组件SubjectService来完成试题添加
 public class SubjectAddAction extends ActionSupport{
     private String subjectTitle;
     private String subjectOptionA;
     private String subjectOptionB;
     private String subjectOptionC;
     private String subjectOptionD;
     private String subjectAnswer;
     private String subjectParse;
     private SubjectService subjectService = new SubjectServiceImpl();

     public String getSubjectTitle() {
         return subjectTitle;
     }
     public void setSubjectTitle(String subjectTitle) {
         this.subjectTitle = subjectTitle;
     }
     public String getSubjectOptionA() {
         return subjectOptionA;
     }
     public void setSubjectOptionA(String subjectOptionA) {
         this.subjectOptionA = subjectOptionA;
     }
     public String getSubjectOptionB() {
         return subjectOptionB;
     }
     public void setSubjectOptionB(String subjectOptionB) {
         this.subjectOptionB = subjectOptionB;
     }
     public String getSubjectOptionC() {
         return subjectOptionC;
     }
     public void setSubjectOptionC(String subjectOptionC) {
         this.subjectOptionC = subjectOptionC;
     }
     public String getSubjectOptionD() {
         return subjectOptionD;
     }
     public void setSubjectOptionD(String subjectOptionD) {
         this.subjectOptionD = subjectOptionD;
     }
     public String getSubjectAnswer() {
         return subjectAnswer;
     }
     public void setSubjectAnswer(String subjectAnswer) {
         this.subjectAnswer = subjectAnswer;
     }
     public String getSubjectParse() {
         return subjectParse;
     }
     public void setSubjectParse(String subjectParse) {
         this.subjectParse = subjectParse;
     }
     public String execute() throws Exception {
         Subject subject = new Subject();
         subject.setSubjectTitle(subjectTitle);
         subject.setSubjectOptionA(subjectOptionA);
         subject.setSubjectOptionB(subjectOptionB);
         subject.setSubjectOptionC(subjectOptionC);
         subject.setSubjectOptionD(subjectOptionD);
         subject.setSubjectAnswer(subjectAnswer);
         subject.setSubjectParse(subjectParse);
         if(subjectService.saveSubject(subject)) {
             return SUCCESS;
         }else {
             this.addActionError("该试题已经添加过了，请不要重复添加!");
             return INPUT;
         }
     }
 }

10.

 package com.sanqing.action;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;

 public class SubjectDeleteAction extends ActionSupport{
     private int subjectID;
     private SubjectService subjectService = new SubjectServiceImpl();
     public int getSubjectID() {
         return subjectID;
     }
     public void setSubjectID(int subjectID) {
         this.subjectID = subjectID;
     }
     public String execute() throws Exception {
         subjectService.deleteSubject(subjectID);
         return SUCCESS;
     }
 }

11.

 package com.sanqing.action;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;
 /*
  * 查看试题详细信息
  */
 public class SubjectParticularAction extends ActionSupport{
     private int subjectID;
     private SubjectService subjectService = new SubjectServiceImpl();
     public int getSubjectID() {
         return subjectID;
     }
     public void setSubjectID(int subjectID) {
         this.subjectID = subjectID;
     }
     public String execute() throws Exception {
         Subject subject = subjectService.showSubjectParticular(subjectID);
         ServletActionContext.getRequest().setAttribute("subject", subject);
         return SUCCESS;
     }
 }

12.

 package com.sanqing.action;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;

 public class SubjectUpdateAction extends ActionSupport{
     private int subjectID;
     private String subjectTitle;
     private String subjectOptionA;
     private String subjectOptionB;
     private String subjectOptionC;
     private String subjectOptionD;
     private String subjectAnswer;
     private String subjectParse;
     private SubjectService subjectService = new SubjectServiceImpl();

     public int getSubjectID() {
         return subjectID;
     }
     public void setSubjectID(int subjectID) {
         this.subjectID = subjectID;
     }
     public String getSubjectTitle() {
         return subjectTitle;
     }
     public void setSubjectTitle(String subjectTitle) {
         this.subjectTitle = subjectTitle;
     }
     public String getSubjectOptionA() {
         return subjectOptionA;
     }
     public void setSubjectOptionA(String subjectOptionA) {
         this.subjectOptionA = subjectOptionA;
     }
     public String getSubjectOptionB() {
         return subjectOptionB;
     }
     public void setSubjectOptionB(String subjectOptionB) {
         this.subjectOptionB = subjectOptionB;
     }
     public String getSubjectOptionC() {
         return subjectOptionC;
     }
     public void setSubjectOptionC(String subjectOptionC) {
         this.subjectOptionC = subjectOptionC;
     }
     public String getSubjectOptionD() {
         return subjectOptionD;
     }
     public void setSubjectOptionD(String subjectOptionD) {
         this.subjectOptionD = subjectOptionD;
     }
     public String getSubjectAnswer() {
         return subjectAnswer;
     }
     public void setSubjectAnswer(String subjectAnswer) {
         this.subjectAnswer = subjectAnswer;
     }
     public String getSubjectParse() {
         return subjectParse;
     }
     public void setSubjectParse(String subjectParse) {
         this.subjectParse = subjectParse;
     }
     public String execute() throws Exception {
         Subject subject = new Subject();
         subject.setSubjectID(subjectID);
         subject.setSubjectTitle(subjectTitle);
         subject.setSubjectOptionA(subjectOptionA);
         subject.setSubjectOptionB(subjectOptionB);
         subject.setSubjectOptionC(subjectOptionC);
         subject.setSubjectOptionD(subjectOptionD);
         subject.setSubjectAnswer(subjectAnswer);
         subject.setSubjectParse(subjectParse);
         subjectService.updateSubject(subject);//更新
         ServletActionContext.getRequest().setAttribute("subject", subject);
         this.addActionMessage("更新成功!");
         return SUCCESS;
     }
 }

13.

 package com.sanqing.action;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Subject;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;

 /*
  * 获得更新试题前的试题
  */
 public class SubjectUpdateBefore extends ActionSupport {
     private int subjectID;
     private SubjectService subjectService = new SubjectServiceImpl();
     public int getSubjectID() {
         return subjectID;
     }
     public void setSubjectID(int subjectID) {
         this.subjectID = subjectID;
     }
     public String execute() throws Exception {
         Subject subject = subjectService.showSubjectParticular(subjectID);
         ServletActionContext.getRequest().setAttribute("subject", subject);
         return SUCCESS;
     }
 }

14.

 package com.sanqing.action;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionSupport;
 import com.sanqing.po.Student;
 import com.sanqing.service.StudentService;
 import com.sanqing.service.StudentServiceImpl;
 import com.sanqing.service.SubjectService;
 import com.sanqing.service.SubjectServiceImpl;

 /*
  * 提交试卷，并打分
  */
 public class SubmitExamAction extends ActionSupport{
     private List<Integer> subjectID;//学生考试的题目
     private SubjectService subjectService = new SubjectServiceImpl();
     private StudentService studentService = new StudentServiceImpl();
     public List<Integer> getSubjectID() {
         return subjectID;
     }
     public void setSubjectID(List<Integer> subjectID) {
         this.subjectID = subjectID;
     }
     public String execute() throws Exception {
         HttpServletRequest request = ServletActionContext.getRequest();
         List<String> studentAnswers = new ArrayList<String>();
         for(int i = 0; i < 20; i++) {
             String answer = request.getParameter("subjectAnswer"+i);
             studentAnswers.add(answer);
         }
         int GeneralPoint = subjectService.accountResult(subjectID, studentAnswers);

         //设置成绩到学生信息中
         Map session = ActionContext.getContext().getSession();
         Student student = (Student)session.get("studentInfo");
         String studentID = student.getStudentID();
         studentService.setStudentResult(studentID, GeneralPoint);
         request.setAttribute("studentName", student.getStudentName());//保存学生姓名和总分数
         request.setAttribute("GeneralPoint", GeneralPoint);
         session.put("subjectIDs", subjectID);//将考试题目保存到session，方便后面显示答案使用
         return SUCCESS;
     }
 }