Java tutorial
package org.aio.handy.poi; /* ==================================================================== 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. ==================================================================== */ import java.io.FileOutputStream; import java.util.HashMap; import java.util.Map; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.Font; 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.Workbook; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.usermodel.XSSFWorkbook; /** * A weekly timesheet created using Apache POI. Usage: TimesheetDemo -xls|xlsx * * @author Yegor Kozlov */ public class TimesheetDemo { private static final String[] titles = { "Person", "ID", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun", "Total\nHrs", "Overtime\nHrs", "Regular\nHrs" }; private static Object[][] sample_data = { { "Yegor Kozlov", "YK", 5.0, 8.0, 10.0, 5.0, 5.0, 7.0, 6.0 }, { "Gisella Bronzetti", "GB", 4.0, 3.0, 1.0, 3.5, null, null, 4.0 }, }; public static void main(String[] args) throws Exception { Workbook wb; if (args.length > 0 && args[0].equals("-xls")) wb = new HSSFWorkbook(); else wb = new XSSFWorkbook(); Map<String, CellStyle> styles = createStyles(wb); Sheet sheet = wb.createSheet("Timesheet"); PrintSetup printSetup = sheet.getPrintSetup(); printSetup.setLandscape(true); sheet.setFitToPage(true); sheet.setHorizontallyCenter(true); // title row Row titleRow = sheet.createRow(0); titleRow.setHeightInPoints(45); Cell titleCell = titleRow.createCell(0); titleCell.setCellValue("Weekly Timesheet"); titleCell.setCellStyle(styles.get("title")); sheet.addMergedRegion(CellRangeAddress.valueOf("$A$1:$L$1")); // header row Row headerRow = sheet.createRow(1); headerRow.setHeightInPoints(40); Cell headerCell; for (int i = 0; i < titles.length; i++) { headerCell = headerRow.createCell(i); headerCell.setCellValue(titles[i]); headerCell.setCellStyle(styles.get("header")); } int rownum = 2; for (int i = 0; i < 10; i++) { Row row = sheet.createRow(rownum++); for (int j = 0; j < titles.length; j++) { Cell cell = row.createCell(j); if (j == 9) { // the 10th cell contains sum over week days, e.g. // SUM(C3:I3) String ref = "C" + rownum + ":I" + rownum; cell.setCellFormula("SUM(" + ref + ")"); cell.setCellStyle(styles.get("formula")); } else if (j == 11) { cell.setCellFormula("J" + rownum + "-K" + rownum); cell.setCellStyle(styles.get("formula")); } else { cell.setCellStyle(styles.get("cell")); } } } // row with totals below Row sumRow = sheet.createRow(rownum++); sumRow.setHeightInPoints(35); Cell cell; cell = sumRow.createCell(0); cell.setCellStyle(styles.get("formula")); cell = sumRow.createCell(1); cell.setCellValue("Total Hrs:"); cell.setCellStyle(styles.get("formula")); for (int j = 2; j < 12; j++) { cell = sumRow.createCell(j); String ref = (char) ('A' + j) + "3:" + (char) ('A' + j) + "12"; cell.setCellFormula("SUM(" + ref + ")"); if (j >= 9) cell.setCellStyle(styles.get("formula_2")); else cell.setCellStyle(styles.get("formula")); } rownum++; sumRow = sheet.createRow(rownum++); sumRow.setHeightInPoints(25); cell = sumRow.createCell(0); cell.setCellValue("Total Regular Hours"); cell.setCellStyle(styles.get("formula")); cell = sumRow.createCell(1); cell.setCellFormula("L13"); cell.setCellStyle(styles.get("formula_2")); sumRow = sheet.createRow(rownum++); sumRow.setHeightInPoints(25); cell = sumRow.createCell(0); cell.setCellValue("Total Overtime Hours"); cell.setCellStyle(styles.get("formula")); cell = sumRow.createCell(1); cell.setCellFormula("K13"); cell.setCellStyle(styles.get("formula_2")); // set sample data for (int i = 0; i < sample_data.length; i++) { Row row = sheet.getRow(2 + i); for (int j = 0; j < sample_data[i].length; j++) { if (sample_data[i][j] == null) continue; if (sample_data[i][j] instanceof String) { row.getCell(j).setCellValue((String) sample_data[i][j]); } else { row.getCell(j).setCellValue((Double) sample_data[i][j]); } } } // finally set column widths, the width is measured in units of 1/256th // of a character width sheet.setColumnWidth(0, 30 * 256); // 30 characters wide for (int i = 2; i < 9; i++) { sheet.setColumnWidth(i, 6 * 256); // 6 characters wide } sheet.setColumnWidth(10, 10 * 256); // 10 characters wide // Write the output to a file String file = "e:/timesheet.xls"; if (wb instanceof XSSFWorkbook) file += "x"; FileOutputStream out = new FileOutputStream(file); wb.write(out); out.close(); } /** * Create a library of cell styles */ private static Map<String, CellStyle> createStyles(Workbook wb) { Map<String, CellStyle> styles = new HashMap<String, CellStyle>(); CellStyle style; Font titleFont = wb.createFont(); titleFont.setFontHeightInPoints((short) 18); titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD); 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) 11); monthFont.setColor(IndexedColors.WHITE.getIndex()); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setFont(monthFont); style.setWrapText(true); styles.put("header", style); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setWrapText(true); style.setBorderRight(CellStyle.BORDER_THIN); style.setRightBorderColor(IndexedColors.BLACK.getIndex()); style.setBorderLeft(CellStyle.BORDER_THIN); style.setLeftBorderColor(IndexedColors.BLACK.getIndex()); style.setBorderTop(CellStyle.BORDER_THIN); style.setTopBorderColor(IndexedColors.BLACK.getIndex()); style.setBorderBottom(CellStyle.BORDER_THIN); style.setBottomBorderColor(IndexedColors.BLACK.getIndex()); styles.put("cell", style); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setDataFormat(wb.createDataFormat().getFormat("0.00")); styles.put("formula", style); style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); style.setFillForegroundColor(IndexedColors.GREY_40_PERCENT.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); style.setDataFormat(wb.createDataFormat().getFormat("0.00")); styles.put("formula_2", style); return styles; } }