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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.poi.examples.ss;
import java.io.FileOutputStream;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.PrintSetup;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.util.LocaleUtil;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* A monthly calendar created using Apache POI. Each month is on a separate sheet.
*
* Usage:
* CalendarDemo -xls|xlsx <year>
*
*/
@SuppressWarnings({"java:S106","java:S4823","java:S1192"})
public final class CalendarDemo {
private static final String[] days = {
"Sunday", "Monday", "Tuesday",
"Wednesday", "Thursday", "Friday", "Saturday"};
private static final String[] months = {
"January", "February", "March","April", "May", "June","July", "August",
"September","October", "November", "December"};
private CalendarDemo() {}
public static void main(String[] args) throws Exception {
Calendar calendar = LocaleUtil.getLocaleCalendar();
boolean xlsx = true;
for (String arg : args) {
if (arg.charAt(0) == '-') {
xlsx = arg.equals("-xlsx");
} else {
calendar.set(Calendar.YEAR, Integer.parseInt(arg));
}
}
int year = calendar.get(Calendar.YEAR);
try (Workbook wb = xlsx ? new XSSFWorkbook() : new HSSFWorkbook()) {
Map styles = createStyles(wb);
for (int month = 0; month < 12; month++) {
calendar.set(Calendar.MONTH, month);
calendar.set(Calendar.DAY_OF_MONTH, 1);
//create a sheet for each month
Sheet sheet = wb.createSheet(months[month]);
//turn off gridlines
sheet.setDisplayGridlines(false);
sheet.setPrintGridlines(false);
sheet.setFitToPage(true);
sheet.setHorizontallyCenter(true);
PrintSetup printSetup = sheet.getPrintSetup();
printSetup.setLandscape(true);
//the following three statements are required only for HSSF
sheet.setAutobreaks(true);
printSetup.setFitHeight((short) 1);
printSetup.setFitWidth((short) 1);
//the header row: centered text in 48pt font
Row headerRow = sheet.createRow(0);
headerRow.setHeightInPoints(80);
Cell titleCell = headerRow.createCell(0);
titleCell.setCellValue(months[month] + " " + year);
titleCell.setCellStyle(styles.get("title"));
sheet.addMergedRegion(CellRangeAddress.valueOf("$A$1:$N$1"));
//header with month titles
Row monthRow = sheet.createRow(1);
for (int i = 0; i < days.length; i++) {
//set column widths, the width is measured in units of 1/256th of a character width
sheet.setColumnWidth(i * 2, 5 * 256); //the column is 5 characters wide
sheet.setColumnWidth(i * 2 + 1, 13 * 256); //the column is 13 characters wide
sheet.addMergedRegion(new CellRangeAddress(1, 1, i * 2, i * 2 + 1));
Cell monthCell = monthRow.createCell(i * 2);
monthCell.setCellValue(days[i]);
monthCell.setCellStyle(styles.get("month"));
}
int cnt = 1, day = 1;
int rownum = 2;
for (int j = 0; j < 6; j++) {
Row row = sheet.createRow(rownum++);
row.setHeightInPoints(100);
for (int i = 0; i < days.length; i++) {
Cell dayCell_1 = row.createCell(i * 2);
Cell dayCell_2 = row.createCell(i * 2 + 1);
int day_of_week = calendar.get(Calendar.DAY_OF_WEEK);
if (cnt >= day_of_week && calendar.get(Calendar.MONTH) == month) {
dayCell_1.setCellValue(day);
calendar.set(Calendar.DAY_OF_MONTH, ++day);
if (i == 0 || i == days.length - 1) {
dayCell_1.setCellStyle(styles.get("weekend_left"));
dayCell_2.setCellStyle(styles.get("weekend_right"));
} else {
dayCell_1.setCellStyle(styles.get("workday_left"));
dayCell_2.setCellStyle(styles.get("workday_right"));
}
} else {
dayCell_1.setCellStyle(styles.get("grey_left"));
dayCell_2.setCellStyle(styles.get("grey_right"));
}
cnt++;
}
if (calendar.get(Calendar.MONTH) > month) break;
}
}
// Write the output to a file
String file = "calendar.xls";
if (wb instanceof XSSFWorkbook) file += "x";
try (FileOutputStream out = new FileOutputStream(file)) {
wb.write(out);
}
}
}
/**
* cell styles used for formatting calendar sheets
*/
private static Map createStyles(Workbook wb){
Map styles = new HashMap<>();
short borderColor = IndexedColors.GREY_50_PERCENT.getIndex();
CellStyle style;
Font titleFont = wb.createFont();
titleFont.setFontHeightInPoints((short)48);
titleFont.setColor(IndexedColors.DARK_BLUE.getIndex());
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
style.setFont(titleFont);
styles.put("title", style);
Font monthFont = wb.createFont();
monthFont.setFontHeightInPoints((short)12);
monthFont.setColor(IndexedColors.WHITE.getIndex());
monthFont.setBold(true);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
style.setFillForegroundColor(IndexedColors.DARK_BLUE.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setFont(monthFont);
styles.put("month", style);
Font dayFont = wb.createFont();
dayFont.setFontHeightInPoints((short)14);
dayFont.setBold(true);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.LEFT);
style.setVerticalAlignment(VerticalAlignment.TOP);
style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setBorderLeft(BorderStyle.THIN);
style.setLeftBorderColor(borderColor);
style.setBorderBottom(BorderStyle.THIN);
style.setBottomBorderColor(borderColor);
style.setFont(dayFont);
styles.put("weekend_left", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.TOP);
style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setBorderRight(BorderStyle.THIN);
style.setRightBorderColor(borderColor);
style.setBorderBottom(BorderStyle.THIN);
style.setBottomBorderColor(borderColor);
styles.put("weekend_right", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.LEFT);
style.setVerticalAlignment(VerticalAlignment.TOP);
style.setBorderLeft(BorderStyle.THIN);
style.setFillForegroundColor(IndexedColors.WHITE.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setLeftBorderColor(borderColor);
style.setBorderBottom(BorderStyle.THIN);
style.setBottomBorderColor(borderColor);
style.setFont(dayFont);
styles.put("workday_left", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.TOP);
style.setFillForegroundColor(IndexedColors.WHITE.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setBorderRight(BorderStyle.THIN);
style.setRightBorderColor(borderColor);
style.setBorderBottom(BorderStyle.THIN);
style.setBottomBorderColor(borderColor);
styles.put("workday_right", style);
style = wb.createCellStyle();
style.setBorderLeft(BorderStyle.THIN);
style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setBorderBottom(BorderStyle.THIN);
style.setBottomBorderColor(borderColor);
styles.put("grey_left", style);
style = wb.createCellStyle();
style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setBorderRight(BorderStyle.THIN);
style.setRightBorderColor(borderColor);
style.setBorderBottom(BorderStyle.THIN);
style.setBottomBorderColor(borderColor);
styles.put("grey_right", style);
return styles;
}
}