Apache POI provides various classes and methods to read and write data in Excel in Selenium tests. Let's unerstand with examples.
Selenium WebDriver is the most used automation tool for the automation of web applications. Now, we know that these web applications are used by multiple users, and each one of those uses the applications as per their own data. So, considering the usage, it becomes the primary responsibility of the QAs also to test the web applications with varying data sets. Now the user journeys will be the same, but the data set will be different. Therefore, it makes more sense to execute the same test case with different data, instead of writing a separate test case for each user journey with each data set. This is where Microsoft Excel comes in handy, which is one of the favorite tools for storing test data. Excel in Selenium is one of the most used combinations for storing test data and then running the same test case against various data sets.
There are various libraries in JAVA which helps in reading/writing data from Excel files. But, Apache POI is one of the most used libraries, which provides various classes and methods to read/write data from various formats of Excel files(xls, xlsx etc). Subsequently, in this article, we will understand the details of Apache POI and how we can use the same to read/write data from Excel files, by covering the details under the following topics:
_Apache POI, where POI stands for _(Poor Obfuscation Implementation) _ is an _API that offers a collection of Java libraries that helps us to read, write, and manipulate different Microsoft files such as excel sheets, power-point, and word files.
Apache POI provides various interfaces and classes that help us to work with Excel. It provides a “_Workbook _” interface to maintain Excel Workbooks. There are certain classes that implement this interface and we use these classes to create, modify, read, and write data in Excel files. The two mainly used classes for managing Excel Workbooks are:
There is another interface, “_Sheet _“, which we use to create a sheet in the Workbook. There are two classes that used to work with sheets, same as we have for Workbook Interface:
The_ Row _interface provides us with the ability to work with rows in the Excel sheet. Below two classes implement this interface:
The_ Cell _interface helps us in accessing the cells of a particular row. There are two classes that implement this interface and we can use for reading/writing data into the cell:
Now that we have gone through the details of the Apache POI library, let’s try to use it to read and write into Excel Files using Selenium WebDriver.
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