Angeregt durch den Compact Calendar (http://davidseah.com/compact-calendar/) wollte ich etwas ähnliches in meine Webanwendung einbauen, sodass das Ergebnis tabellenartig wie https://docs.google.com/spreadsheet/ccc?key=0AkyxK00VLnSidEl1SS1sZjZiVlpuRnJIY1JmUW9IRHc#gid=0 formatiert wird.

import java.text.DateFormatSymbols;
import java.util.*;

public class PrintCalender
{
  public static class CalLine
  {
    int weekOfYear; 
    int month = -1;  // 0 <= month <= 11 
    int[] day = { -1, -1, -1, -1, -1, -1, -1 }; 
  }

  public static List<CalLine> calenderOfTheYear( int year )
  {
    Calendar cal = new GregorianCalendar( year, 1, 1 );

    List<CalLine> lines = new ArrayList<>();
    CalLine line = new CalLine();

    for ( int dayOfYear = 1; dayOfYear <= cal.getActualMaximum( Calendar.DAY_OF_YEAR ); dayOfYear++ ) {
      cal.set( Calendar.DAY_OF_YEAR, dayOfYear );
      line.weekOfYear = cal.get( Calendar.WEEK_OF_YEAR ); // Set several times, thats ok

      int dayOfMonth = cal.get( Calendar.DAY_OF_MONTH );
      int dayOfWeek  = cal.get( Calendar.DAY_OF_WEEK );

      if ( dayOfMonth == 1 )
        line.month = cal.get( Calendar.MONTH );

      line.day[dayOfWeek - 1] = dayOfMonth;

      if ( dayOfWeek == Calendar.SUNDAY ) {
        lines.add( line );
        line = new CalLine();
      }
    }
    lines.add( line );
    return lines;
  }
  
  public static void main( String[] args )
  {
    List<CalLine> lines = calenderOfTheYear( 2012 );

    String[] monthNames = new DateFormatSymbols( Locale.GERMANY ).getMonths();
    System.out.println( "KW        Mo Do Mi Do Fr Sa So" ); // to lazy for DateFormatSymbols here...

    for ( CalLine l : lines ) {
      String monthStr = (l.month == -1) ? "   " : monthNames[ l.month ].substring( 0, 3 );
      // Days are Sun, Mon, ..., Sat. Rearange to Mon, ..., Sun
      String s = String.format( "%2d  %s   %(2d %(2d %(2d %(2d %(2d %(2d %(2d",
                                l.weekOfYear, monthStr,
                                l.day[1], l.day[2], l.day[3], l.day[4], l.day[5], l.day[6], l.day[0] ).replace( "(1)", "  " );
      System.out.println( s );
    }
  }
}

Zur Demo gibt eine Textausgabe (mit einem Hack). Das Ergebnis für dieses Jahr:

kw        mo do mi do fr sa so
52  jan                      1
 1         2  3  4  5  6  7  8
 2         9 10 11 12 13 14 15
 3        16 17 18 19 20 21 22
 4        23 24 25 26 27 28 29
 5  feb   30 31  1  2  3  4  5
 6         6  7  8  9 10 11 12
 7        13 14 15 16 17 18 19
 8        20 21 22 23 24 25 26
 9  mär   27 28 29  1  2  3  4
10         5  6  7  8  9 10 11
11        12 13 14 15 16 17 18
12        19 20 21 22 23 24 25
13  apr   26 27 28 29 30 31  1
14         2  3  4  5  6  7  8
15         9 10 11 12 13 14 15
16        16 17 18 19 20 21 22
17        23 24 25 26 27 28 29
18  mai   30  1  2  3  4  5  6
19         7  8  9 10 11 12 13
20        14 15 16 17 18 19 20
21        21 22 23 24 25 26 27
22  jun   28 29 30 31  1  2  3
23         4  5  6  7  8  9 10
24        11 12 13 14 15 16 17
25        18 19 20 21 22 23 24
26  jul   25 26 27 28 29 30  1
27         2  3  4  5  6  7  8
28         9 10 11 12 13 14 15
29        16 17 18 19 20 21 22
30        23 24 25 26 27 28 29
31  aug   30 31  1  2  3  4  5
32         6  7  8  9 10 11 12
33        13 14 15 16 17 18 19
34        20 21 22 23 24 25 26
35  sep   27 28 29 30 31  1  2
36         3  4  5  6  7  8  9
37        10 11 12 13 14 15 16
38        17 18 19 20 21 22 23
39        24 25 26 27 28 29 30
40  okt    1  2  3  4  5  6  7
41         8  9 10 11 12 13 14
42        15 16 17 18 19 20 21
43        22 23 24 25 26 27 28
44  nov   29 30 31  1  2  3  4
45         5  6  7  8  9 10 11
46        12 13 14 15 16 17 18
47        19 20 21 22 23 24 25
48  dez   26 27 28 29 30  1  2
49         3  4  5  6  7  8  9
50        10 11 12 13 14 15 16
51        17 18 19 20 21 22 23
52        24 25 26 27 28 29 30
 1        31                  

Ähnliche Beiträge

• Snippet: Kalender ausdrucken, Teil 2: von-bis
• filter map map filter map sorted forEach, wird das die Zukunft sein?
• gzip Kommandozeilenprogramm mit wenigen Zeilen Quellcode
• Snippet: List all MessageDigest provider
• How to put files in a ZIP file with NIO.2