Tag: Apache POI

This is a class under the org.apache.poi.xsssf.usermodel package. It implements the PrintSetup interface. It is used to set print page size, area, options, and settings.

It is a high-level class under the org.apache.poi.hssf.usermodel package. It implements the Workbook interface and is used for Excel files in .xls format.

This is a class under the org.apache.poi.hssf.util package. It provides different colors as nested classes. Usually these nested classes are represented by using their own indexes. It implements the Color interface.

This is a class which represents high level representation of excel spreadsheet. It is under org.apache.poi.hssf.usermodel package.

XSSFCellStyle class is used to style a cell. Following code snippet can be used to set the cell alignment to “Top Left”.

XSSFCellStyle style1 = workbook.createCellStyle();

spreadsheet.setColumnWidth(0, 8000);

style1.setAlignment(XSSFCellStyle.ALIGN_LEFT);

style1.setVerticalAlignment(XSSFCellStyle.VERTICAL_TOP);

cell.setCellValue(“Top Left”);

cell.setCellStyle(style1);

Following code snippet demonstrate setting up the printable area of an excel using Apache POI.

XSSFWorkbook workbook = new XSSFWorkbook();

XSSFSheet spreadsheet = workbook

.createSheet(“Print Area”);

//set print area with indexes

workbook.setPrintArea(

0, //sheet index

0, //start column

5, //end column

0, //start row

5 //end row

);

//set paper size

spreadsheet.getPrintSetup().setPaperSize(

XSSFPrintSetup.A4_PAPERSIZE);

//set display grid lines or not

spreadsheet.setDisplayGridlines(true);

//set print grid lines or not

spreadsheet.setPrintGridlines(true);

It is a class that is used to represent both high and low level Excel file formats. It belongs to the org.apache.xssf.usemodel package and implements the Workbook interface.

This is a class under the org.apache.poi.xssf.usermodel package. It implements the Cell interface. It is a high-level representation of cells in the rows of a spreadsheet.

This is a class under the org.apache.poi.xssf.usermodel package. It implements the Row interface, therefore it can create rows in a spreadsheet.

XSSFCell.CELL_TYPE_FORMULA can be used to the cell as formula cell.

// Create SUM formula

cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);

cell.setCellFormula(“SQRT(C2)” );

cell = row.createCell(3);

cell.setCellValue(“SQRT(C2)”);

This is a class under the org.apache.poi.xssf.usermodel package. It implements the Hyperlink interface. It is used to set a hyperlink to the cell contents of a spreadsheet.

XSSFCell.CELL_TYPE_FORMULA can be used to the cell as formula cell.

// Create SUM formula

cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);

cell.setCellFormula(“SUM(C2:C3)” );

cell = row.createCell(3);

cell.setCellValue(“SUM(C2:C3)”);

The following code snippet is used to create a spreadsheet:

//Create Blank workbook

XSSFWorkbook workbook = new XSSFWorkbook();

//Create a blank spreadsheet

XSSFSheet spreadsheet = workbook.createSheet(“Sheet Name”);

Write down steps to create a row in a spreadsheet in Apache POI.

The following code snippet is used to create a row.

XSSFRow row = spreadsheet.createRow((short)1);

This is a class under the org.apache.poi.xssf.usermodel package. It implements the CreationHelper interface. It is used as a support class for formula evaluation and setting up hyperlinks.

XSSFCell.CELL_TYPE_FORMULA can be used to the cell as formula cell.

// Create SUM formula

cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);

cell.setCellFormula(“MAX(C2:C3)” );

cell = row.createCell(3);

cell.setCellValue(“MAX(C2:C3)”);

The following code snippet is used for creating a cell:

//create new workbook

XSSFWorkbook workbook = new XSSFWorkbook();

//create spreadsheet with a name

XSSFSheet spreadsheet = workbook.createSheet(“new sheet”);

//create first row on a created spreadsheet

XSSFRow row = spreadsheet.createRow(0);

//create first cell on created row

XSSFCell cell = row.createCell(0);

XSSFCell.CELL_TYPE_FORMULA can be used to the cell as formula cell.

// Create SUM formula

cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);

cell.setCellFormula(“POWER(C2:C3)” );

cell = row.createCell(3);

cell.setCellValue(“POWER(C2:C3)”);

Components of Apache POI:

Apache POI contains classes and methods to work on all OLE2 Compound documents of MS Office. The list of components of this API is given below.

POIFS (Poor Obfuscation Implementation File System) − This component is the basic factor of all other POI elements. It is used to read different files explicitly.

• HSSF (Horrible Spreadsheet Format): It is used to read and write xls format of MS-Excel files.
• XSSF (XML Spreadsheet Format): It is used for xlsx file format of MS-Excel.
• HPSF (Horrible Property Set Format): It is used to extract property sets of the MS-Office files.
• HWPF (Horrible Word Processor Format): It is used to read and write doc extension files of MS-Word.
• XWPF (XML Word Processor Format): It is used to read and write docx extension files of MS-Word.
• HSLF (Horrible Slide Layout Format): It is used for read, create, and edit PowerPoint presentations.
• HDGF (Horrible DiaGram Format): It contains classes and methods for MS-Visio binary files.
• HPBF (Horrible PuBlisher Format): It is used to read and write MS-Publisher files.

Apache POI is a popular API that allows programmers to create, modify, and display MS Office files using Java programs. It is an open source library developed and distributed by Apache Software Foundation to design or modify Microsoft Office files using Java program. It contains classes and methods to decode the user input data or a file into MS Office documents.

This is a class under the org.apache.poi.hssf.usermodel package. It can create excel spreadsheets and it allows to format the sheet style and sheet data.

XSSFCell.CELL_TYPE_FORMULA can be used to the cell as formula cell.

// Create SUM formula

cell.setCellType(XSSFCell.CELL_TYPE_FORMULA);

cell.setCellFormula(“FACT(C2)” );

cell = row.createCell(3);

cell.setCellValue(“FACT(C2)”);

This is a class under the org.apache.poi.xssf.usermodel package. It implements the Font interface and therefore it can handle different fonts in a workbook.

XSSFCellStyle class can be used to rotate a cell. Following code snippet can be used to set the cell text alignment to a specified angle.

//90 degrees

XSSFCellStyle myStyle = workbook.createCellStyle();

myStyle.setRotation((short) 90);

cell = row.createCell(5);

cell.setCellValue(“90D angle”);

cell.setCellStyle(myStyle);

XSSFFont class is used to add a font to a cell. Following code snippet can be used to set the background color of a cell to “Green”.

//Create a new font and alter it.

XSSFFont font = workbook.createFont();

font.setFontHeightInPoints((short) 30);

font.setFontName(“IMPACT”);

font.setItalic(true);

font.setColor(HSSFColor.BRIGHT_GREEN.index);

//Set font into style

XSSFCellStyle style = workbook.createCellStyle();

style.setFont(font);

This is a class under the org.apache.poi.xssf.usermodel package. It will provide possible information regarding the format of the content in a cell of a spreadsheet. It also provides options for modifying that format. It implements the CellStyle interface.

XSSFHyperlink can be used to the add an hyperlink to a cell.

CreationHelper createHelper = workbook.getCreationHelper();

XSSFHyperlink link = (XSSFHyperlink)createHelper.createHyperlink(Hyperlink.LINK_URL);

link.setAddress(“http://www.example.com/” );

cell.setHyperlink((XSSFHyperlink) link);