There are many ways to test your RESTful Web services developed using Spring
MVC e.g. you can use
RESTAssured
for automation testing or you can use Postman to manually test your RESTful
Web service but nothing beats the elegant, comfort, power, and simplicity of
using
curl command
to test RESTful web service. It is my favorite tool to test any RESTful web
service and I have used in past to test various aspect of Spring REST
application e.g. testing headers, testing authentication and authorization,
testing different content types like
JSON
and
XML, testing cookies, and testing different HTTP methods to perform CRUD
operations.
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How to Consume JSON from RESTful Web Service and Convert to Java Object - Spring RestTemplate Example
So far, I have not written much about REST and RESTful web service, barring some interview questions like REST vs. SOAP, which is thankfully very much appreciated by my readers, and some general suggestions about the best books to learn REST in the past. Today I am going to write something about how to consume JSON from a RESTful Web Service in Java using Spring Framework. I will also talk about how to convert the JSON to Java objects using Jackson. You will also learn about the RESTTemplate class from the Spring MVC framework, and how you can use it to create a REST client in Java in just a few lines of code.
Labels:
REST
,
spring
,
spring boot
,
spring mvc
How to find the First Key or Value from a Map in Java? HashMap Example Tutorial
Hello guys, if you are working with Java HashMap or any other Map implementation like TreeMap or LinkedHashMap and wondering how to get the first enty, first key or first value then you have come to the right place. In my past articles, I have talked about how HashMap works internally as well as we have seen several HashMap examples and in this article, I will show you how to get the first key or value from HashMap in Java. I actually needed this when I was doing a coding exercise online and I was using TreeMap to store objects. Since TreeMap store objects or mapping like key and value in sorted order the first element can be either maximum or minimum depending upon whether you sorted the TreeMap on increasing or decreasing order.
Labels:
core java
,
HashMap
,
java collection tutorial
Difference between REST and GraphQL API with Example
Hello guys, I have been learning GraphQL since last week and should I say, I
am really impressed with its flexibility and how it address some of the
pertinent problems with
REST APIs. If you don't know, The GraphQL is a query language from Facebook
which aims to solves some common problems with REST like a explosion of
endpoints, over fetching and under fetching of data, response structure,
versioning, and most important performance and Scalability. If you have used
REST APIs
then you know that you need to send a lot of request to get the data you
want. You not only need send multiple request but also you get a lot
of unnecessary data which you don't really need, and also need to
know multiple endpoints.
Top 20 Spring and REST Interview Questions Answers for Java/JEE Programmers
Hello guys, I have been sharing a lot of REST with Spring tutorials from last a couple of weeks and today, I am going to share some of the frequently asked Spring and REST interview questions to Java developers applying for Web developer roles. Since Spring Framework is the most popular and the standard framework for developing Java web application and RESTful Web Services, a good knowledge of Spring core and Spring MVC is expected from any senior Java developer, but if the job description mention about REST and Web Services, you also need to be aware of how to develop RESTful Web Services using Spring Framework.
Labels:
interview questions
,
REST
,
spring
,
spring interview questions
Top 5 Tools for Testing REST APIs and RESTful Web Services in 2023 - Best of Lot
Hello guys, If you are a Java or web developer working on REST APIs and RESTful web services and looking for some tools to test your APIs and web services then you have come to the right place. Earlier, I have shared the best books and courses for RESTful web services and in this article, I am going to share five awesome but easily accessible and free tools to test your REST APIs. These REST API testing tools will help you to test your APIs as you build, starting from unit testing to integration testing and then fully automating your resting to create a regression pack. You can also use these tools to interact with your REST API during the development phase for quick tests.
Labels:
best of javarevisited
,
REST
,
Testing
,
tools
What is the use of DispatcherServlet in Spring MVC Framework?
If you have worked with Spring MVC then you should know what is a DispatcherServlet? It's actually the heart of Spring MVC, precisely the C of MVC design pattern or Controller. Every single web request which is supposed to be processed by Spring MVC goes through DispatcherServlet. In general, its an implementation of Front Controller Pattern which provides a single point of entry in your application. It handles all incoming requests. It is also the bridge between Java and Spring. Btw, the DispatcherServlet is like any other Servlet is declared in the web.xml with a URL pattern but the only special thing is that the URL pattern for dispatcher servlet is enough to map every single web request to DispathcherServlert.
Labels:
spring
,
spring interview questions
,
spring mvc
7 Reasons to use Spring Framework for Creating RESTful Webservices in Java
REST has now become a standard way to develop web services and when it comes to Java, there are many frameworks and libraries available like JAX-RS, Restlet, Jersey, RESTEasy, Apache CFX, etc, but I encourage Java developers to use Spring framework to develop RESTful web services. But, some of you might ask, why use Spring Framework to develop RESTful web services in Java? What is the advantage and why it's better than other frameworks and libraries available out there? Well, the most important reason I think to use Spring for developing RESTful web service is that you can use your Spring MVC experience to develop RESTful web services.
Labels:
REST
,
spring
,
spring mvc
Spring Hello World Example in Java using Dependency Injection
Hello All, In this Spring framework tutorial, you will learn how to write the hello world example in the Spring framework. This should be your first tutorial to start learning the Spring framework, as it gets the ball rolling. While coding and running this example, you learn a lot about the Spring framework, Spring XSD files, necessary JAR files, and more importantly how the Spring framework works. This HelloWorld program in Spring framework is an extension of the classical Java hello world program, which you might have seen earlier. This program is written using the Dependency Injection design pattern by using the Spring Frameworks' IOC container. Even though now you can configure Spring dependency using annotations and Java configuration, this example uses a traditional XML way to configure dependencies.
Labels:
How to examples
,
spring
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