jsp+servlet搭建在線投票問卷系統
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開發環境準備：
- jdk1.8
- tomcat8
- mysql5.7
- intellij IDEA
系統采用技術：
- jsp+ servlet mvc三層架構模式
- jdbc
- jQuery+ajax
- ECharts 4.3.0
專案介紹
用戶端
-
用戶端可以查看問卷串列并參與問卷調查
-
查看個人參與的調查報告以及整個問卷情況
管理端
-
問卷的新增和維護
-
用戶資訊維護
專案設計
運行效果
-
注冊
-
登錄
-
添加問卷
-
問卷投票串列
-
投票詳情
-
用戶串列
-
資料庫表
-
代碼結構截圖,
關鍵代碼:
- 添加問卷：
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
String questionTitle = request.getParameter("questionTitle"); //問卷標題
String qId = request.getParameter("qId"); //問卷id
Integer ops =Integer.valueOf(request.getParameter("ops"));//具體幾組
String doType=request.getParameter("doType"); //操作型別
User user=(User)request.getSession().getAttribute(User.SESSIONNAME);
SubjectService subjectService=new SubjectServiceImpl();
List<Subject> subjects=new ArrayList<>(); //問題串列
Question question=new Question();
question.setTitle(questionTitle);
if("add".equalsIgnoreCase(doType)){ //如果修改添加id
if(null!=user){//用戶物件不為空，保存值
question.setUserId(user.getId());
}
}else{
question.setId(Integer.valueOf(qId));
}
String title="";
for(int i=0;i<ops;i++){
int number = Integer.parseInt(request.getParameter("number"+i));
String[] os = request.getParameterValues("options"+i);
String[] osIds = request.getParameterValues("optionsIds"+i);//選項id
title=request.getParameter("title"+i);//問題標題
String titleId=request.getParameter("titleId"+i);//問題id
Subject subject = new Subject();
subject.setOrderId(i);
subject.setTitle(title);
subject.setNumber(number);
if(null!=titleId&&!"".equalsIgnoreCase(titleId)){//設定問題id
subject.setId(Integer.valueOf(titleId));
}
for(int i1=0;i1<os.length;i1++){
Option op = new Option();
op.setContent(os[i1]);
if("modify".equalsIgnoreCase(doType)){ //如果修改添加id
op.setId(Integer.valueOf(osIds[i1]));
}
subject.getOptions().add(op);
}
try {
long startTime=new Date().getTime();
subject.setStartTime(startTime);
subject.setEndTime(startTime+1*24*60*60*1000);
subject.setMaster(user);
subjects.add(subject);
} catch (ReTryException e) {
HttpSession session = request.getSession();
session.setAttribute("subject", subject);
session.setAttribute("message", e.getMessage());
response.sendRedirect(request.getContextPath() + "/m/add");
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
try{
if("add".equalsIgnoreCase(doType)){//添加
subjectService.add(question,subjects);
}else{//修改
subjectService.modify(question,subjects);
}
}catch (Exception e){
e.printStackTrace();
}
if(null!=user&&user.getRole().equalsIgnoreCase("user")){
response.sendRedirect(request.getContextPath() + "/list?action=myRelease");//用戶查看自己的發布
}else{
response.sendRedirect(request.getContextPath() + "/list?action=index");
}
}
- 修改問卷資訊
public void doGet(HttpServletRequest request, HttpServletResponse response) {
int id = Integer.parseInt(request.getParameter("id"));
try {
SubjectService subjectService = new SubjectServiceImpl();
QuestionService questionService = new QuestionServiceImpl();
SubjectQueryModel subjectQueryModel=new SubjectQueryModel();
subjectQueryModel.setQuestionId(id);
List<Subject> subject = subjectService.getSubjects(subjectQueryModel);//問題串列
subjectQueryModel.setQuestionId(id);
Question question=questionService.getQuestion(id);
request.setAttribute("subjects", subject);
request.setAttribute("ops", subject.size());//多少組
request.setAttribute("question", question);
request.getRequestDispatcher("/WEB-INF/pages/modify.jsp")
.forward(request, response);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
- 問卷投票
public void doGet(HttpServletRequest request, HttpServletResponse response) {
try{
PrintWriter printWriter = response.getWriter();
int subjectId=Integer.parseInt(request.getParameter("subjectId"));
String id = request.getParameter("options");
String[] ids = id.split(",");
if(null==ids){ //未選中任何一項答案
printWriter.println(0);
return;
}else{
User user= (User)request.getSession().getAttribute(User.SESSIONNAME);
//如果登錄用戶，判斷是否已經投過票
if(null!=user){
RecordQueryModel recordQueryModel=new RecordQueryModel();
recordQueryModel.getUser().setId(user.getId());
recordQueryModel.getSubject().setId(subjectId);
List<Record> list=recordService.getVotes(recordQueryModel);
if(list.size()>0){ //當前用戶已經投過票
printWriter.println(2);
return;
}
}
List<Record> records = new ArrayList<>();
for(int i=0;i<ids.length;i++){
Record record = new Record();
record.getSubject().setId(subjectId);
record.getOption().setId(Integer.parseInt(ids[i]));
if(null!=user){
record.getUser().setId(user.getId());
}
records.add(record);
}
try {
recordService.vote(records); //保存問卷資訊
printWriter.println(1);//參與成功
return;
} catch (ReTryException e) {
e.printStackTrace();
printWriter.println(3);//參與成功
return;
}catch(Exception ex){
ex.printStackTrace();
throw new RuntimeException(ex);
}
}
} catch (Exception e){
e.printStackTrace();
}
}
根據jdbc直連技術，撰寫資料庫操作工具類，方便存盤資料，代碼如下：
public class DBUtils {
String url = null; //連接地址
String username = null; //資料庫名
String password = null; //資料庫密碼
String driverClass = null; //連接驅動
private static DBUtils db = new DBUtils();
/**構建資料庫連接引數*/
private DBUtils() {
try {
url = "jdbc:mysql://localhost:3306/shopCartDb?useUnicode=true&characterEncoding=utf8";
username = "root";
password = "root123";
driverClass = "com.mysql.jdbc.Driver";
Class.forName(driverClass);
} catch (Exception e) {
e.printStackTrace();
}
}
/**構建資料庫連接物件*/
public Connection getConnection(){
Connection conn = null;
try {
conn = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
public static DBUtils getInstance(){
return db;
}
}
- 投票可視化代碼
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession();
try {
int subjectId=Integer.parseInt(request.getParameter("subjectId")); //題目
RecordService recordService=new RecordServiceImpl();
List<Record> list=recordService.geyVotes(subjectId);
if(list.size()>0){
session.setAttribute("list", list);
session.setAttribute("stitle", list.get(0).getSubject().getTitle());
List<String> opDatas=new ArrayList<>();
Map<String,Integer> map=new HashMap<>();
for(Record r:list){
if(null!=r.getOption()){
if(!opDatas.contains(r.getOption().getContent())){
opDatas.add(r.getOption().getContent());
map.put(r.getOption().getContent(),0);
}
map.put(r.getOption().getContent(),map.get(r.getOption().getContent())+1);
}
}
String opData="";
for(String o:opDatas){
opData=https://www.cnblogs.com/code200/archive/2020/12/22/opData+"'"+o+"',";
}
if(opData.length()>0){
opData=https://www.cnblogs.com/code200/archive/2020/12/22/opData.substring(0,opData.length()-1);
}
session.setAttribute("opData", opData); //選項
String datavn="";
for (String key : map.keySet()) {
datavn=datavn+"{ value: "+map.get(key)+", name: '"+key+"' },";
}
if(datavn.length()>0){
datavn=datavn.substring(0,datavn.length()-1);
}
session.setAttribute("datavn", datavn);
request.getRequestDispatcher("/WEB-INF/pages/view.jsp").forward(request, response);
return;
}else{
request.setAttribute("exception","暫無問卷結果！");
request.getRequestDispatcher("/WEB-INF/pages/500.jsp").forward(request, response);
return;
}
} catch (ReTryException e) {
request.getSession().setAttribute("message", e.getMessage());
response.sendRedirect(request.getContextPath()+"/m/view");
}catch(Exception ex){
ex.printStackTrace();
}
}
核心代碼截圖
- 我的發布后臺程式
- 管理員維護界面后臺代碼
- 管理員創建界面后臺代碼
時序圖
- mvc流程圖
- 問卷操作時序圖
- 用戶注冊登錄時序圖
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