DeleteCheck1.java

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.Calendar;
import java.sql.*;

public class DeleteCheck1 extends HttpServlet{

    protected Connection conn = null;

    public void init() throws ServletException{
        String url = "jdbc:mysql://localhost/servletschedule";
        String user = "scheduleuser";
        String password = "schedulepass";

        try {
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            conn = DriverManager.getConnection(url, user, password);
        }catch (ClassNotFoundException e){
            log("ClassNotFoundException:" + e.getMessage());
        }catch (SQLException e){
            log("SQLException:" + e.getMessage());
        }catch (Exception e){
            log("Exception:" + e.getMessage());
        }
    }

    public void destory(){
        try{
            if (conn != null){
                conn.close();
            }
        }catch (SQLException e){
            log("SQLException:" + e.getMessage());
        }
    }

    public void doGet(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException{

        res.setContentType("text/html;charset=Shift_Jis");
        PrintWriter out = res.getWriter();

        int year = -1;
        int month = -1;
        int day = -1;
        int currentscheduleid;
        String currentStartTime = "";
        String currentEndTime = "";
        String currentSchedule = "";
        String currentMemo = "";

        String param = req.getParameter("ID");
        if (param == null || param.length() == 0){
            currentscheduleid = -1;
        }else{
            try{
                currentscheduleid = Integer.parseInt(param);
            }catch (NumberFormatException e){
                currentscheduleid = -1;
            }
        }

        /* パラメータが不正な場合はトップページへリダイレクト */
        if (currentscheduleid == -1){
            res.sendRedirect("/schedule/top.html");
        }

        try {
            String sql = "SELECT * FROM schedule WHERE id = ?";
            PreparedStatement pstmt = conn.prepareStatement(sql);

            pstmt.setInt(1, currentscheduleid);
            ResultSet rs = pstmt.executeQuery();

            rs.next();
            String scheduledate = rs.getString("scheduledate");
            String yearStr = scheduledate.substring(0, 4);
            String monthStr = scheduledate.substring(5, 7);
            String dayStr = scheduledate.substring(8, 10);

            year = Integer.parseInt(yearStr);
            month = Integer.parseInt(monthStr) - 1;
            day = Integer.parseInt(dayStr);

            currentStartTime = rs.getString("starttime");
            currentEndTime = rs.getString("endtime");
            currentSchedule = rs.getString("schedule");
            currentMemo = rs.getString("schedulememo");

            rs.close();
            pstmt.close();

        }catch (SQLException e){
            log("SQLException:" + e.getMessage());
        }

        StringBuffer sb = new StringBuffer();

        sb.append("<!DOCTYPE html PUBLIC ¥"-//W3C//DTD HTML 4.0.1//EN¥" ¥"http://www.w3.org/TR/html4/strict.dtd¥">");

        sb.append("<html lang=¥"ja¥">");
        sb.append("<head>");
        sb.append("<meta http-equiv=¥"Content-Type¥" Content=¥"text/html;charset=Shift_JIS¥">");

        sb.append("<title>スケジュール削除</title>");

        sb.append("<style>");
        sb.append("table.sche{border:1px solid #a9a9a9;padding:0px;margin:0px;border-collapse:collapse;}");
        sb.append("td{vertical-align:top;margin:0px;padding:2px;font-size:0.75em;height:20px;}");
        sb.append("td.top{border-bottom:1px solid #a9a9a9;text-align:center;}");
        sb.append("td.time{background-color:#f0f8ff;text-align:right;border-right:1px double #a9a9a9;padding-right:5px;}");
        sb.append("td.timeb{background-color:#f0f8ff;border-bottom:1px solid #a9a9a9;border-right:1px double #a9a9a9;}");
        sb.append("td.contents{background-color:#ffffff;border-bottom:1px dotted #a9a9a9;}");
        sb.append("td.contentsb{background-color:#ffffff;border-bottom:1px solid #a9a9a9;}");
        sb.append("td.ex{background-color:#ffebcd;border:1px solid #8b0000;}");
        sb.append("table.view{border:1px solid #a9a9a9;padding:0px;margin:0px;border-collapse:collapse;width:250px}");
        sb.append("table.view td{border:1px solid #a9a9a9;}");
        sb.append("table.view td.left{width:70px;background-color:#f0f8ff;}");
        sb.append("img{border:0px;}");
        sb.append("p{font-size:0.75em;}");
        sb.append("</style>");

        sb.append("</head>");
        sb.append("<body>");

        sb.append("<p>");
        sb.append("スケジュールの削除確認  ");
        sb.append("[<a href=¥"/schedule/ScheduleView");
        sb.append("?ID=");
        sb.append(currentscheduleid);
        sb.append("¥">スケジュール表示へ戻る</a>]");
        sb.append("</p>");

        String[] scheduleArray = new String[49];
        int[] widthArray = new int[49];

        for (int i = 0 ; i < 49 ; i++){
            scheduleArray[i] = "";
            widthArray[i] = 0;
        }

        try {
            String sql = "SELECT * FROM schedule WHERE userid = ? and scheduledate = ? ORDER BY starttime";
            PreparedStatement pstmt = conn.prepareStatement(sql);

            String startDateStr = year + "-" + (month + 1) + "-" + day;
            pstmt.setInt(1, 1);
            pstmt.setString(2, startDateStr);

            ResultSet rs = pstmt.executeQuery();

            while(rs.next()){
                int id = rs.getInt("id");
                String starttime = rs.getString("starttime");
                String endtime = rs.getString("endtime");
                String schedule = rs.getString("schedule");

                if (starttime == null || endtime == null){
                    widthArray[0] = 1;

                    StringBuffer sbSchedule = new StringBuffer();
                    sbSchedule.append("<a href=¥"/schedule/ScheduleView?ID=");
                    sbSchedule.append(id);
                    sbSchedule.append("¥">");
                    sbSchedule.append(schedule);
                    sbSchedule.append("</a>");

                    scheduleArray[0] = scheduleArray[0] + (new String(sbSchedule)) + "<br>";

                }else{
                    String startTimeStr = starttime.substring(0, 2);
                    String startMinuteStr = starttime.substring(3, 5);

                    int startTimeNum = Integer.parseInt(startTimeStr);
                    int index = startTimeNum * 2 + 1;
                    if (startMinuteStr.equals("30")){
                        index++;
                    }

                    if (widthArray[index] == 0){
                    /* 既にデータが入っていた場合は異常な状態なので無視する */

                        String endTimeStr = endtime.substring(0, 2);
                        String endMinuteStr = endtime.substring(3, 5);

                        int endTimeNum = Integer.parseInt(endTimeStr);
                        int width = (endTimeNum - startTimeNum) * 2;

                        if (startMinuteStr.equals("30")){
                            width--;
                        }

                        if (endMinuteStr.equals("30")){
                            width++;
                        }

                        StringBuffer sbSchedule = new StringBuffer();
                        sbSchedule.append(startTimeStr);
                        sbSchedule.append(":");
                        sbSchedule.append(startMinuteStr);
                        sbSchedule.append("-");
                        sbSchedule.append(endTimeStr);
                        sbSchedule.append(":");
                        sbSchedule.append(endMinuteStr);
                        sbSchedule.append(" ");
                        sbSchedule.append("<a href=¥"/schedule/ScheduleView?ID=");
                        sbSchedule.append(id);
                        sbSchedule.append("¥">");
                        sbSchedule.append(schedule);
                        sbSchedule.append("</a>");

                        scheduleArray[index] = new String(sbSchedule);
                        widthArray[index] = width;

                        /* 同じスケジュールの先頭以外の箇所には「-1」を設定 */
                        for (int i = 1 ; i < width ; i++){
                            widthArray[index + i] = -1;
                        }
                    }
                }
            }

            rs.close();
            pstmt.close();

        }catch (SQLException e){
            log("SQLException:" + e.getMessage());
        }

        sb.append("<table class=¥"view¥">");
        sb.append("<tr><td class=¥"left¥">日付</td><td>");
        sb.append(year);
        sb.append("年");
        sb.append(month + 1);
        sb.append("月");
        sb.append(day);
        sb.append("日");
        sb.append("</td></tr>");
        sb.append("<tr><td class=¥"left¥">時間</td><td>");
        if (currentStartTime == null){
            sb.append("未定");
        }else{
            sb.append(currentStartTime.substring(0, 5));
            sb.append(" - ");
            sb.append(currentEndTime.substring(0, 5));
        }
        sb.append("</td></tr>");
        sb.append("<tr><td class=¥"left¥">スケジュール</td><td>");
        sb.append(currentSchedule);
        sb.append("</td></tr>");
        sb.append("<tr><td class=¥"left¥" style=¥"height:150px;¥">メモ</td><td>");
        currentMemo = currentMemo.replaceAll("¥r¥n", "<br>");
        sb.append(currentMemo);
        sb.append("</td></tr>");
        sb.append("</table>");

        sb.append("<p>スケジュールを削除します。一度削除すると元には戻せません</p>");
        sb.append("<p>削除しますか?</p>");

        sb.append("<p>");
        sb.append("[<a href=¥"/schedule/ScheduleDelete?ID=");
        sb.append(currentscheduleid);
        sb.append("&YEAR=");
        sb.append(year);
        sb.append("&MONTH=");
        sb.append(month);
        sb.append("¥">削除する</a>]");
        sb.append("  ");
        sb.append("[<a href=¥"/schedule/ScheduleView?ID=");
        sb.append(currentscheduleid);
        sb.append("¥">キャンセル</a>]");
        sb.append("</p>");

        sb.append("</body>");
        sb.append("</html>");

        out.println(new String(sb));
    }

    protected int getMonthLastDay(int year, int month, int day){

        Calendar calendar = Calendar.getInstance();

        /* 今月が何日までかを確認する */
        calendar.set(year, month + 1, 0);
        int thisMonthlastDay = calendar.get(Calendar.DATE);

        return thisMonthlastDay;
    }

}

( Written by Tatsuo Ikura )

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著者 / TATSUO IKURA

初心者~中級者の方を対象としたプログラミング方法や開発環境の構築の解説を行うサイトの運営を行っています。