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;
    }
}