MonthView4.java
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.Calendar;
public class MonthView4 extends HttpServlet{
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException{
res.setContentType("text/html;charset=Shift_Jis");
PrintWriter out = res.getWriter();
int[] calendarDay;
int count;
int year;
int month;
int day = 1;
calendarDay = new int[42]; /* 最大で7日×6週 */
count = 0;
String param = req.getParameter("YEAR");
if (param == null || param.length() == 0){
year = -999;
}else{
try{
year = Integer.parseInt(param);
}catch (NumberFormatException e){
year = -999;
}
}
param = req.getParameter("MONTH");
if (param == null || param.length() == 0){
month = -999;
}else{
try{
month = Integer.parseInt(param);
}catch (NumberFormatException e){
month = -999;
}
}
/* パラメータが指定されていない場合は本日の日付を設定 */
if (year == -999 || month == -999){
Calendar calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = calendar.get(Calendar.DATE);
}else{
if (month == 12){
month = 0;
year++;
}
if (month == -1){
month = 11;
year--;
}
}
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>スケジュール管理</title>");
sb.append("<style>");
sb.append("table{border:1px solid #a9a9a9;width:90%;padding:0px;margin:0px;border-collapse:collapse;}");
sb.append("td{width:12%;border-top:1px solid #a9a9a9;border-left:1px solid #a9a9a9;vertical-align:top;margin:0px;padding:2px;}");
sb.append("td.week{background-color:#f0f8ff;text-align:center;}");
sb.append("td.day{background-color:#f5f5f5;text-align:right;font-size:0.75em;}");
sb.append("td.otherday{background-color:#f5f5f5;color:#d3d3d3;text-align:right;font-size:0.75em;}");
sb.append("td.sche{background-color:#fffffff;text-align:left;height:80px;}");
sb.append("img{border:0px;}");
sb.append("span.small{font-size:0.75em;}");
sb.append("</style>");
sb.append("</head>");
sb.append("<body>");
/* 日付データを配列に格納 */
count = setDateArray(year, month, day, calendarDay, count);
/* 年月のリンク作成 */
sb.append(createMonthLink(year, month));
sb.append("<table>");
sb.append("<tr><td class=\"week\">日</td><td class=\"week\">月</td><td class=\"week\">火</td><td class=\"week\">水</td><td class=\"week\">木</td><td class=\"week\">金</td><td class=\"week\">土</td></tr>");
int weekCount = count / 7;
for (int i = 0 ; i < weekCount ; i++){
/* スケジュールの日付画面を作成する */
sb.append("<tr>");
for (int j = i * 7 ; j < i * 7 + 7 ; j++){
if (calendarDay[j] > 35){
sb.append("<td class=\"otherday\">");
sb.append(calendarDay[j] - 35);
}else{
sb.append("<td class=\"day\">");
sb.append(calendarDay[j]);
}
sb.append("</td>");
}
sb.append("</tr>");
/* カレンダーのスケジュール登録画面を作成する */
sb.append(createScheduleStr(year, month, i * 7, calendarDay));
}
sb.append("</table>");
sb.append("</body>");
sb.append("</html>");
out.println(new String(sb));
}
/* スケジュール登録へのリンクを設定する */
protected String createScheduleStr(int year, int month, int startDayNo, int[] calendarDay){
StringBuffer sb = new StringBuffer();
sb.append("<tr>");
for (int i = startDayNo ; i < startDayNo + 7 ; i++){
if (calendarDay[i] > 35){
/* 前月及び翌月の箇所にはアイコンは表示しない */
sb.append("<td class=\"sche\"></td>");
}else{
sb.append("<td class=\"sche\">");
sb.append("<a href=\"/schedule/NewSchedule");
/* パラメータの作成 */
sb.append("?YEAR=");
sb.append(year);
sb.append("&MONTH=");
sb.append(month);
sb.append("&DAY=");
sb.append(calendarDay[i]);
sb.append("\">");
sb.append("<img src=\"./img/memo.png\" width=\"14\" height=\"16\">");
sb.append("</a>");
sb.append("</td>");
}
sb.append("</td>");
}
sb.append("</tr>");
return (new String(sb));
}
protected int setDateArray(int year, int month, int day, int[] calendarDay, int count){
Calendar calendar = Calendar.getInstance();
/* 今月が何曜日から開始されているか確認する */
calendar.set(year, month, 1);
int startWeek = calendar.get(Calendar.DAY_OF_WEEK);
System.out.println("今月の曜日は" + startWeek + "から");
/* 先月が何日までだったかを確認する */
calendar.set(year, month, 0);
int beforeMonthlastDay = calendar.get(Calendar.DATE);
System.out.println("先月は" + beforeMonthlastDay + "日まで");
/* 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);
System.out.println("今月は" + thisMonthlastDay + "日まで\r\n");
/* 先月分の日付を格納する */
for (int i = startWeek - 2 ; i >= 0 ; i--){
calendarDay[count++] = beforeMonthlastDay - i + 35;
}
/* 今月分の日付を格納する */
for (int i = 1 ; i <= thisMonthlastDay ; i++){
calendarDay[count++] = i;
}
/* 翌月分の日付を格納する */
int nextMonthDay = 1;
while (count % 7 != 0){
calendarDay[count++] = 35 + nextMonthDay++;
}
return count;
}
protected String createMonthLink(int year, int month){
StringBuffer sb = new StringBuffer();
sb.append("<p>");
sb.append("<a href=\"/schedule/MonthView?YEAR=");
sb.append(year);
sb.append("&MONTH=");
sb.append(month - 1);
sb.append("\"><span class=\"small\">前月</span></a> ");
sb.append(year);
sb.append("年");
sb.append(month + 1);
sb.append("月 ");
sb.append("<a href=\"/schedule/MonthView?YEAR=");
sb.append(year);
sb.append("&MONTH=");
sb.append(month + 1);
sb.append("\"><span class=\"small\">翌月</span></a>");
sb.append("</p>");
return (new String(sb));
}
}
( Written by Tatsuo Ikura )
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著者 / TATSUO IKURA
プログラミングや開発環境構築の解説サイトを運営しています。