Java tutorial
/* ==================================================================== Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with 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 the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ==================================================================== */ package Demos; import org.apache.poi.xssf.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.usermodel.Font; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import java.io.FileOutputStream; import java.util.Calendar; import java.util.Map; import java.util.HashMap; /** * A monthly calendar created using Apache POI. Each month is on a separate * sheet. * * <pre> * Usage: * CalendarDemo -xls|xlsx <year> * </pre> * * @author Yegor Kozlov */ public 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" }; public static void main(String[] args) throws Exception { Calendar calendar = Calendar.getInstance(); boolean xlsx = true; for (int i = 0; i < args.length; i++) { if (args[i].charAt(0) == '-') { xlsx = args[i].equals("-xlsx"); } else { calendar.set(Calendar.YEAR, Integer.parseInt(args[i])); } } int year = calendar.get(Calendar.YEAR); Workbook wb = xlsx ? new XSSFWorkbook() : new HSSFWorkbook(); Map<String, CellStyle> 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 = "C:\\Users\\BaldiniHP\\Desktop\\calendar.xls"; if (wb instanceof XSSFWorkbook) file += "x"; FileOutputStream out = new FileOutputStream(file); wb.write(out); out.close(); } /** * cell styles used for formatting calendar sheets */ private static Map<String, CellStyle> createStyles(Workbook wb) { Map<String, CellStyle> styles = new HashMap<String, CellStyle>(); 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(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); style.setFont(titleFont); styles.put("title", style); Font monthFont = wb.createFont(); monthFont.setFontHeightInPoints((short) 12); monthFont.setColor(IndexedColors.WHITE.getIndex()); monthFont.setBoldweight(Font.BOLDWEIGHT_BOLD); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); style.setFillForegroundColor(IndexedColors.DARK_BLUE.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setFont(monthFont); styles.put("month", style); Font dayFont = wb.createFont(); dayFont.setFontHeightInPoints((short) 14); dayFont.setBoldweight(Font.BOLDWEIGHT_BOLD); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_LEFT); style.setVerticalAlignment(CellStyle.VERTICAL_TOP); style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setBorderLeft(CellStyle.BORDER_THIN); style.setLeftBorderColor(borderColor); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(borderColor); style.setFont(dayFont); styles.put("weekend_left", style); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_TOP); style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setBorderRight(CellStyle.BORDER_THIN); style.setRightBorderColor(borderColor); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(borderColor); styles.put("weekend_right", style); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_LEFT); style.setVerticalAlignment(CellStyle.VERTICAL_TOP); style.setBorderLeft(CellStyle.BORDER_THIN); style.setFillForegroundColor(IndexedColors.WHITE.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setLeftBorderColor(borderColor); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(borderColor); style.setFont(dayFont); styles.put("workday_left", style); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_TOP); style.setFillForegroundColor(IndexedColors.WHITE.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setBorderRight(CellStyle.BORDER_THIN); style.setRightBorderColor(borderColor); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(borderColor); styles.put("workday_right", style); style = wb.createCellStyle(); style.setBorderLeft(CellStyle.BORDER_THIN); style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(borderColor); styles.put("grey_left", style); style = wb.createCellStyle(); style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setBorderRight(CellStyle.BORDER_THIN); style.setRightBorderColor(borderColor); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(borderColor); styles.put("grey_right", style); return styles; } }