To select the first children of a given Selenium element, we can simply use the :first-child CSS selector. Here is an example which will find the first child having div tag. 1WebElement childDiv = element.findElement(By.cssSelector("div:first-child")); In case we want to get the list of immediate child …

Selenium WebDriver became a de-facto standard for automating the web based UI testing. It can also be very useful in screen scraping or crawling kind of applications. Here we have a basic example of web UI automation using Selenuium framework. We will use gradle as the build tool. We can simply call it as Hello World …

Here is an example code of how to execute native SQL query with some parameters in JPA / Spring Boot. First we need use Spring Boot's EntityManagerFactory bean. We can simply use @Autowired annotation to make this available in our class. Then create new EntityManager session, execute the native SQL and finally close …

Google Gson is very popular library to convert JSON to object and vice versa. The formJson(...) and toJson(...) are the two main APIs for the same. In this example we will see how to perform following JSON parsing operations using those APIs. 1. Convert an object to JSON string 2. Convert a list of objects to JSON …

While working with Selenium WebDriver and trying to perform an automated click on that, sometime we encounter the above error. The most common reason behind it is the element is not visible in the screen or visible area. To fix this, we have to first move to that element and perform the click. That means instead of …

Sometime we want our user to download some file from our web application that is developed in Spring MVC or Spring Boot. To achieve this the main trick is to send the Content-Disposition http header before sending the data. Here is an example of a Controller class with just one method that take the name of a jpg image …

In web server application, sending image data to client browser is quite common job. This can be easily achieved in Spring or Spring boot MVC Controller. Key things here is to specify proper Content-Type such as image/png or whatever and then return the raw binary data of the image. Here is a sample code to demonstrate …

Here we will see how to build a sample full stack web application using Spring Boot, Spring JPA with database like PostgreSQL, MySQL or Oracle Thymeleaf and Gradle. This example is very similar with my other example regarding Spring boot with H2 database: Spring Boot H2 data source with Thymeleaf using Gradle The …

In practical scenario it is very common to integrate a database with the web service application. Here we will see an example to use Hibernate to store and retrieve data in Spark Java application. We will use MySql database behind the Hibernate. The application provides HTML based UI for entering and viewing data. …

Spring Boot comes with all the needed components for creating RESTful web services. Here we will see how easily we can build a simple Spring Boot application which will provide web services for CRUD operations i.e. Create, Retrieve, Update and Delete operations using HTTP POST, GET, PUT and DELETE method respectively. …