Apache POI generate Excel Report Example

The beauty of Excel is that not only you can present data in Tabular form but actually format it along with Header and Footer sections to be printed as a report. I am not very good at using Excel but I have seen people use Excel for a lot of things such as Order forms, no wonder its that popular. In this example we are going to learn the following useful features to generate a Report using the Apache POI classes ...

• Set Column widths
• Set Page margins - Left, Right, Top and Bottom
• Set Header and Footer margins
• Set Header Left, Center and Right Sections
• Set Footer with Page numbers
• Set Cell Borders using custom CellStyle
• Create Multiple Pages with Heading and Details

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package com.as400samplecode;   import java.io.FileOutputStream; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date;   import org.apache.poi.hssf.usermodel.HSSFHeader; import org.apache.poi.hssf.usermodel.HSSFPrintSetup; import org.apache.poi.hssf.usermodel.HeaderFooter; 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.Footer; import org.apache.poi.ss.usermodel.Header; import org.apache.poi.ss.usermodel.IndexedColors; 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.xssf.usermodel.XSSFWorkbook;   public class ExcelGenerateReport {    private CellStyle cs = null;  private CellStyle csBold = null;  private CellStyle csTop = null;  private CellStyle csRight = null;  private CellStyle csBottom = null;  private CellStyle csLeft = null;  private CellStyle csTopLeft = null;  private CellStyle csTopRight = null;  private CellStyle csBottomLeft = null;  private CellStyle csBottomRight = null;    public static void main(String[] args) {     ExcelGenerateReport myReport = new ExcelGenerateReport();   myReport.createExcel();    }    public void createExcel() {     try{      Workbook wb = new XSSFWorkbook();    Sheet sheet = wb.createSheet("My Excel Report");      //Setup some styles that we need for the Cells    setCellStyles(wb);      //Get current Date and Time    Date date = new Date(System.currentTimeMillis());    DateFormat df = new SimpleDateFormat("MM/dd/yy HH:mm:ss");      //Set Column Widths    sheet.setColumnWidth(0, 2500);    sheet.setColumnWidth(1, 2500);    sheet.setColumnWidth(2, 6000);    sheet.setColumnWidth(3, 10000);    sheet.setColumnWidth(4, 3000);      //Setup the Page margins - Left, Right, Top and Bottom    sheet.setMargin(Sheet.LeftMargin, 0.25);    sheet.setMargin(Sheet.RightMargin, 0.25);    sheet.setMargin(Sheet.TopMargin, 0.75);    sheet.setMargin(Sheet.BottomMargin, 0.75);      //Setup the Header and Footer Margins    sheet.setMargin(Sheet.HeaderMargin, 0.25);    sheet.setMargin(Sheet.FooterMargin, 0.25);         //If you are using HSSFWorkbook() instead of XSSFWorkbook()    //HSSFPrintSetup ps = (HSSFPrintSetup) sheet.getPrintSetup();    //ps.setHeaderMargin((double) .25);    //ps.setFooterMargin((double) .25);      //Set Header Information    Header header = sheet.getHeader();    header.setLeft("*** ORIGINAL COPY ***");    header.setCenter(HSSFHeader.font("Arial", "Bold") +      HSSFHeader.fontSize((short) 14) + "SAMPLE ORDER");    header.setRight(df.format(date));      //Set Footer Information with Page Numbers    Footer footer = sheet.getFooter();    footer.setRight( "Page " + HeaderFooter.page() + " of " +      HeaderFooter.numPages() );        int rowIndex = 0;    rowIndex = insertHeaderInfo(sheet, rowIndex);    rowIndex = insertDetailInfo(sheet, rowIndex);      rowIndex = 47 * 1;    rowIndex = insertHeaderInfo(sheet, rowIndex);    rowIndex = insertDetailInfo(sheet, rowIndex);      rowIndex = 47 * 2;    rowIndex = insertHeaderInfo(sheet, rowIndex);    rowIndex = insertDetailInfo(sheet, rowIndex);      //Write the Excel file    FileOutputStream fileOut = null;    fileOut = new FileOutputStream("data/myReport.xlsx");    wb.write(fileOut);    fileOut.close();     }   catch (Exception e) {    System.out.println(e);   }    }    private void setCellStyles(Workbook wb) {     //font size 10   Font f = wb.createFont();   f.setFontHeightInPoints((short) 10);     //Simple style   cs = wb.createCellStyle();   cs.setFont(f);     //Bold Fond   Font bold = wb.createFont();   bold.setBoldweight(Font.BOLDWEIGHT_BOLD);   bold.setFontHeightInPoints((short) 10);     //Bold style   csBold = wb.createCellStyle();   csBold.setBorderBottom(CellStyle.BORDER_THIN);   csBold.setBottomBorderColor(IndexedColors.BLACK.getIndex());   csBold.setFont(bold);     //Setup style for Top Border Line   csTop = wb.createCellStyle();   csTop.setBorderTop(CellStyle.BORDER_THIN);   csTop.setTopBorderColor(IndexedColors.BLACK.getIndex());   csTop.setFont(f);     //Setup style for Right Border Line   csRight = wb.createCellStyle();   csRight.setBorderRight(CellStyle.BORDER_THIN);   csRight.setRightBorderColor(IndexedColors.BLACK.getIndex());   csRight.setFont(f);     //Setup style for Bottom Border Line   csBottom = wb.createCellStyle();   csBottom.setBorderBottom(CellStyle.BORDER_THIN);   csBottom.setBottomBorderColor(IndexedColors.BLACK.getIndex());   csBottom.setFont(f);     //Setup style for Left Border Line   csLeft = wb.createCellStyle();   csLeft.setBorderLeft(CellStyle.BORDER_THIN);   csLeft.setLeftBorderColor(IndexedColors.BLACK.getIndex());   csLeft.setFont(f);     //Setup style for Top/Left corner cell Border Lines   csTopLeft = wb.createCellStyle();   csTopLeft.setBorderTop(CellStyle.BORDER_THIN);   csTopLeft.setTopBorderColor(IndexedColors.BLACK.getIndex());   csTopLeft.setBorderLeft(CellStyle.BORDER_THIN);   csTopLeft.setLeftBorderColor(IndexedColors.BLACK.getIndex());   csTopLeft.setFont(f);     //Setup style for Top/Right corner cell Border Lines   csTopRight = wb.createCellStyle();   csTopRight.setBorderTop(CellStyle.BORDER_THIN);   csTopRight.setTopBorderColor(IndexedColors.BLACK.getIndex());   csTopRight.setBorderRight(CellStyle.BORDER_THIN);   csTopRight.setRightBorderColor(IndexedColors.BLACK.getIndex());   csTopRight.setFont(f);     //Setup style for Bottom/Left corner cell Border Lines   csBottomLeft = wb.createCellStyle();   csBottomLeft.setBorderBottom(CellStyle.BORDER_THIN);   csBottomLeft.setBottomBorderColor(IndexedColors.BLACK.getIndex());   csBottomLeft.setBorderLeft(CellStyle.BORDER_THIN);   csBottomLeft.setLeftBorderColor(IndexedColors.BLACK.getIndex());   csBottomLeft.setFont(f);     //Setup style for Bottom/Right corner cell Border Lines   csBottomRight = wb.createCellStyle();   csBottomRight.setBorderBottom(CellStyle.BORDER_THIN);   csBottomRight.setBottomBorderColor(IndexedColors.BLACK.getIndex());   csBottomRight.setBorderRight(CellStyle.BORDER_THIN);   csBottomRight.setRightBorderColor(IndexedColors.BLACK.getIndex());   csBottomRight.setFont(f);    }    private int insertHeaderInfo(Sheet sheet, int index){     int rowIndex = index;   Row row = null;   Cell c = null;     rowIndex++;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellValue("Customer No:");   c.setCellStyle(csTopLeft);   c = row.createCell(1);   c.setCellStyle(csTop);   c = row.createCell(2);   c.setCellValue("ABC");   c.setCellStyle(csTopRight);     rowIndex++;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellValue("Order No:");   c.setCellStyle(csLeft);   c = row.createCell(2);   c.setCellValue("123456");   c.setCellStyle(csRight);     rowIndex++;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellStyle(csLeft);   c = row.createCell(2);   c.setCellStyle(csRight);     rowIndex++;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellValue("Name:");   c.setCellStyle(csLeft);   c = row.createCell(2);   c.setCellValue("ABC Customer");   c.setCellStyle(csRight);     rowIndex++;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellValue("Address:");   c.setCellStyle(csLeft);   c = row.createCell(2);   c.setCellValue("123 Street No.");   c.setCellStyle(csRight);     rowIndex++;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellStyle(csLeft);   c = row.createCell(2);   c.setCellValue("Unknown City, State ZIPCODE");   c.setCellStyle(csRight);     rowIndex++;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellStyle(csBottomLeft);   c = row.createCell(1);   c.setCellStyle(csBottom);   c = row.createCell(2);   c.setCellValue("U.S.A.");   c.setCellStyle(csBottomRight);     rowIndex = rowIndex + 3;   row = sheet.createRow(rowIndex);   c = row.createCell(0);   c.setCellValue("Line No");   c.setCellStyle(csBold);   c = row.createCell(1);   c.setCellValue("Quantity");   c.setCellStyle(csBold);   c = row.createCell(2);   c.setCellValue("Item No");   c.setCellStyle(csBold);   c = row.createCell(3);   c.setCellValue("Description");   c.setCellStyle(csBold);   c = row.createCell(4);   c.setCellValue("Price");   c.setCellStyle(csBold);     return rowIndex;    }    private int insertDetailInfo(Sheet sheet, int index){     int rowIndex = 0;   Row row = null;   Cell c = null;     for(int i = 1; i < 35; i++){         rowIndex = index + i;    row = sheet.createRow(rowIndex);    c = row.createCell(0);    c.setCellValue(i);    c.setCellStyle(cs);    c = row.createCell(1);    c.setCellValue(10 + i);    c.setCellStyle(cs);    c = row.createCell(2);    c.setCellValue("ITEM" + i);    c.setCellStyle(cs);    c = row.createCell(3);    c.setCellValue("My ITEM" + i + " Decscription");    c.setCellStyle(cs);    c = row.createCell(4);    c.setCellValue(1.11 * i);    c.setCellStyle(cs);     }     return rowIndex;    } }

References

• Apache POI Quick Guide