Excel files (spreadsheets) are widely used by people all over the world for various tasks related to organization, analysis, and storage of tabular data.
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Since excel files are so common, we developers often encounter use-cases when we need to read data from an excel file or generate a report in excel format.
In this article, I’ll show you how to read excel files in Java using a very simple yet powerful open source library called Apache POI.
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- An XLSX file is nothing but a Microsoft Excel Open XML Spreadsheet File that has been created by Microsoft Excel 2007 and later versions. Let’s see how to read XLSX file in Java using Apache POI. Reading an Excel XLSX File. In your existing code you need to first specify the location of your XLSX file.
- To read, write and update XLSX, we can use Apache POI API. Apache POI is efficient to handle excel file. There are methods and classes in POI that makes excel processing very easy. Find some classes description which belongs to org.apache.poi.xssf.usermodel package. XSSFWorkbook: This is the root class to handle XLSX. It reads excel file from a.
- To Read and Write excel files in Selenium we have to take help of third party API like JXL and Apache POI. To read or write an Excel,Apache provides a very famous library POI. This library is capable enough to read and write both XLS and XLSX file format of Excel.
To Read and Write excel files in Selenium we have to take help of third party API like JXL and Apache POI. To read or write an Excel,Apache provides a very famous library POI. This library is capable enough to read and write both XLS and XLSX file format of Excel.
And in the next article, You’ll learn how to create and write to an excel file using Apache POI.
Let’s get started!
DependenciesFirst of all, We need to add the required dependencies for including Apache POI in our project. If you use maven, you need to add the following dependencies to your pom.xml file -
Maven
Gradle
If you use gradle then you can add the following to your build.gradle file
The first dependency poi is used to work with the old Microsoft’s binary file format for excel. These file formats have .xls extension.
The second dependency poi-ooxml is used to work with the newer XML based file format. These file formats have .xlsx extension.
Following is a sample excel file that we’ll read in our code. It is created using Google Sheets and has .xlsx extension.
Note that, Although the sample file is of the newer XML based file format (.xlsx). The code that we’ll write will work with both types of file formats - .xls and .xlsx
Apache POI excel library revolves around following four key interfaces -
Workbook: A workbook is the high-level representation of a Spreadsheet.
Sheet: A workbook may contain many sheets. The sample excel file that we looked at in the previous section has two sheets -
EmployeeandDepartmentRow: As the name suggests, It represents a row in the spreadsheet.
Cell: A cell represents a column in the spreadsheet.
Apache POI library consists of two different implementations for all the above interfaces.
HSSF (Horrible SpreadSheet Format): HSSF implementations of POI’s high-level interfaces like
HSSFWorkbook,HSSFSheet,HSSFRowandHSSFCellare used to work with excel files of the older binary file format -.xlsXSSF (XML SpreadSheet Format): XSSF implementations are used to work with the newer XML based file format -
.xlsx.
The following program shows you how to read an excel file using Apache POI. Since we’re not using any file format specific POI classes, the program will work for both types of file formats - .xls and .xlsx.
The program shows three different ways of iterating over sheets, rows, and columns in the excel file -
Note that we’re not even using the concrete classes like HSSFWorkbook and XSSFWorkbook to create an instance of the Workbook. We’re creating the workbook using a WorkbookFactory instead. This makes our program format independent and it works for both types of files - .xls and .xlsx.
The program shows three different ways to iterate over sheets, rows, and columns. I prefer the Java 8 forEach loop with a lambda expression. You may use whichever method you like.
Poi For Xlsx Read In Selenium For Mac Windows 10Note that, I’ve used a DataFormatter to format and get each cell’s value as String.
Instead of using a DataFormatter to format and get each cell’s value as String regardless of the Cell type, You may check each cell’s type and then retrieve its value using various type-specific methods like this -
You may now call the above method in the main program to print each cell’s value -
ConclusionThat’s all folks! In this article, You learned how to read excel files in Java using Apache POI library. You can find the entire source code on the github repository.
Also, Don’t forget to check out the next article to learn how to create and write to an excel file using Apache POI
Thank you for reading. Until next time!
Poi For Xlsx Read In Selenium For Mac Windows 7We all know the importance of a file and how frequently we use it, for example, either we create a new file, update or delete something from it. Selenium helps to automate file manipulation.
So, In this blog, we will learn how to install the poi jar file, which jar file is required for that and how to perform the read operation on excel with the help of JAVA IO package and APACHE POI library.
POI library is enough to read write both XLS and XLSX file.
Note: For .XLS file read-write, we can use .JXL jar file but it won’t support to .xlsx file.
Let’s begin the journey: –
Step 1. If you haven’t used eclipse then Install the Eclipse latest version.
Step 2. If you haven’t added WebDriver then download the webdriver jar file and add to library.
Step 3. If you are using Maven then use the following dependencies.
<!– https://mvnrepository.com/artifact/org.apache.poi/poi –>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.0.1</version>
</dependency>
Or else you can directly download the latest POI jar file from https://poi.apache.org/download.html
Step 4. Once the jar file is downloaded then unzip the file and add library file into your project.
Right click on your project -> Build Path -> Configure Build Path-> Library -> Add External Jar-> ok
Below are Java interfaces and classes that we will use for read/write xls and xlsx file in POI
XSSFWorkbook: – Is a class representation of XLSX file.
HSSFWrokbook: – Is a class representation of XLS file.
XSSFSheet:- XSSFSheet classes implement this interface represent XLSX file’s sheet.
HSSFSheet: – HSSFSheet classes implement this interface XLS file’s sheet.
XSSFRow:- XSSFSheet classes implement this interface represent a row of XLSX file.
HSSFRow: – HSSFSheet classes implement this interface represent a row of XLS file.
XSSFCell:- XSSFSheet classes implement this interface represent a cell in a row of XLSX file.
HSSFCell: – HSSFSheet classes implement this interface represent a cell in a row of XLS file.
Write Data in an Excel sheet
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
publicclass WriteInExcel {
publicstaticvoid main(String args[])throws IOException{
String ctVal= “Status”;
// File Location
File src = new File(“D://Dazeworks//Selenium Projects//Credential.xlsx”);
// Open File using FileInputStream class
FileInputStream fis = new FileInputStream(src);
// Create Workbook instance holding reference to .xlsx file
XSSFWorkbook workbook = new XSSFWorkbook(fis);
// Get first/desired sheet from the workbook
XSSFSheet sheet = workbook.getSheetAt(0);
// Entering a value in Row[0] and Cell[4]. Here cell is nothing but Column number
sheet.getRow(0).createCell(4).setCellValue(ctVal);
// If user want to enter a value as per choice row then create row
XSSFRow r = sheet.createRow(14);
//Create a cell for the value where you want to enter.
XSSFCell c = r.createCell(10);
//Entering the Value for particular cell
c.setCellValue(“How’s Josh????”);
//Using FileOutputStream to specify output file name
FileOutputStream fos = new FileOutputStream(src);
// Writing the values in workbook
workbook.write(fos);
//File close
fos.close();
System.out.println(“Value inserted successfully”);
