質問編集履歴
1
ソースコードの追加
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File without changes
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body
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@@ -20,6 +20,209 @@
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TomcatのサーバーでGachaServlet.javaを右クリック→サーバで実行をしましたところ、下記の様なエラーが出ました。
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### ソースコード
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以下が、今回で使うファイルのソースコードです。
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- GachaServlet.java
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```
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import java.io.*;
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import java.util.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import gacha.*;
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import java.util.Random;
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import java.sql.*;
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public class GachaServlet extends HttpServlet {
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private static String DB_NAME = "gacha_db";
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private static String DB_USER = "root";
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private static String DB_PASS = "root";
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private static String LOGIN_JSP = "WEB-INF/Login.jsp";
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private static String START_JSP = "WEB-INF/Start.jsp";
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private static String MISS_JSP = "WEB-INF/Miss.jsp";
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private static String HIT_JSP = "WEB-INF/Hit.jsp";
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private static String LOG_JSP = "WEB-INF/log.jsp";
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private static String RANKING_JSP = "WEB-INF/ranking.jsp";
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public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
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doProcess(req, res);
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}
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public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
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doProcess(req, res);
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}
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protected void doProcess(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
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String nextView = "";
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DatabaseConnector dc = null;
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UserManager um = null;
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RankingManager rm = null;
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Random r = new Random();
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int N = r.nextInt(100);
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try {
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dc = new DatabaseConnector(DB_NAME, DB_USER, DB_PASS);
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dc.openConnection();
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um = new UserManager(dc);
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rm = new RankingManager(dc);
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req.setCharacterEncoding("UTF-8");
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res.setContentType("text/html; charset=UTF-8");
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PrintWriter out = res.getWriter();
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String action = req.getParameter("action");
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if(action == null) {
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action = "";
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}
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if(action.equals("") || action.equals("loginPage")) {
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nextView = LOGIN_JSP;
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} else if(action.equals("login")) {
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if(login(um, req)) {
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nextView = START_JSP;
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} else {
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nextView = LOGIN_JSP;
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}
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} else if(action.equals("logout")) {
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nextView = logout(req);
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} else if(action.equals("registration")) {
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nextView = registration(um, req);
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} else if(action.equals("gacha_result")) {
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if(N >= 0 && 95 > N){
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nextView = miss(req);
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} else {
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Connection con=null; Statement st=null;
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String login="root"; String passwd="root";
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ResultSet rs = null;
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nextView = hit(req, rm);
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}
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} else if(action.equals("start")) {
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nextView = START_JSP;
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} else if(action.equals("log")) {
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nextView = LOG_JSP;
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} else if(action.equals("log_reset")) {
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Connection con=null; Statement st=null;
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String login="root"; String passwd="root";
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ResultSet rs = null;
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try {
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Class.forName("com.mysql.jdbc.Driver");
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String url = "jdbc:mysql://localhost/gacha_db" + "?useUnicode=true&characterEncoding=UTF-8" + "&autoReconnect=true";
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con = DriverManager.getConnection(url, login, passwd);
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st = con.createStatement();
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String sql = "truncate table log_tbl";
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rs = st.executeQuery(sql);
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} catch (Exception e) {
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} finally {
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try {
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rs.close();
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con.close();
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st.close();
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} catch (Exception e) {
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}
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}
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nextView = LOG_JSP;
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} else if(action.equals("ranking")) {
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nextView = RANKING_JSP;//showRanking(rm, req);
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}
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if(nextView.equals("")) {
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req.setAttribute("message", "不正なアクションが要求されました(" + req.getParameter("action") + ")");
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nextView = LOGIN_JSP;
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}
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dc.closeConnetion();
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} catch(Exception e) {
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e.printStackTrace();
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req.setAttribute("message", "例外が発生しました:" + e.toString());
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nextView = LOGIN_JSP;
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} finally {
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req.getRequestDispatcher(nextView).forward(req, res);
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}
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}
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private boolean login(UserManager um, HttpServletRequest req) throws Exception {
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String userName = req.getParameter("uname");
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String password = req.getParameter("pass");
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if(!isValid(userName) || !isValid(password)) {
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req.setAttribute("message", "記入漏れがあります");
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return false;
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} else if(um.authenticate(userName, password) == false) {
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req.setAttribute("message", "ユーザ名またはパスワードが違います");
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return false;
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} else {
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HttpSession session = req.getSession(true);
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int add = 0;
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session.setAttribute("userName", userName);
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session.setAttribute("add", add);
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req.setAttribute("message", "認証に成功しました");
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}
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return true;
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}
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private String registration(UserManager um, HttpServletRequest req) throws Exception {
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String userName = req.getParameter("uname");
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String password = req.getParameter("pass");
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String password2 = req.getParameter("pass2");
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if(!isValid(userName) || !isValid(password) || !isValid(password2)) {
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req.setAttribute("message", "記入漏れがあります");
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} else if(!password.equals(password2)) {
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req.setAttribute("message", "パスワードが確認用と一致しません");
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} else if(um.registration(userName, password)) {
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req.setAttribute("message", "登録に成功しました");
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} else {
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req.setAttribute("message", "すでに登録されています");
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}
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return LOGIN_JSP;
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}
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private String logout(HttpServletRequest req) {
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HttpSession session = req.getSession(false);
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if(session != null) {
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session.invalidate();
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req.setAttribute("message", "ログアウトしました");
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}
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return LOGIN_JSP;
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}
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private String miss(HttpServletRequest req){
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HttpSession session = req.getSession(true);
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int add = (Integer)session.getAttribute("add");
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add += 100;
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session.setAttribute("add", add);
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return MISS_JSP;
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}
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private String hit(HttpServletRequest req, RankingManager rm) {
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HttpSession session = req.getSession(true);
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int add = (Integer)session.getAttribute("add");
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add += 100;
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session.setAttribute("add", add);
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int MONEY = add;
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String UNAME = (String)session.getAttribute("userName");
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rm.RankingSet(MONEY, UNAME);
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session.setAttribute("add", 0);
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return HIT_JSP;
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}
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protected boolean isValid(String str) {
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if(str != null && !str.equals("")) {
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return true;
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} else {
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return false;
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}
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}
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}
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```
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23
226
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### 試したこと
|
|
24
227
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今回、環境を整えるにあたり、行ったこと、確認したことを書きます。
|
|
25
228
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- ウィンドウ→設定で、一般→ワークスペース→UTF-8を確認。
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