If you are working on a REST API for your project and you need to document it so that you can share API documentation with other team members or external to your team developers, there are at least a couple of ways to do it: You can either open a new Google Document and start…
Read More How To Document REST APIIn this tutorial, you will learn how to read HTTP Request Header in the Rest Controller class of your Spring Boot application. To read HTTP Request Header in Spring Boot REST application, we use @RequestHeader annotation. @RequestHeader(value=”Accept”) String acceptHeader To learn how to test if HTTP Header is received, read the tutorial about Testing HTTP Header…
Read More Read HTTP Request Header in Spring Boot RESTIn this Swagger tutorial, I am going to share with you how to add Contact and API information to your RESTful Web Service documentation created with Swagger. When adding Swagger to our RESTful Web Service, we usually create a new configuration Java Class which is then annotated with @Configuration annotation. Below is an example of…
Read More REST API Contact and ApiInfo with SwaggerIf your project uses Spring Security and you have added Swagger to it then there is a little of additional configuration you need to do to make your /v2/api-docs and swagger-ui.html pages work. Enable Swagger URLs in Spring Security Project To enable Swagger URLs in a RESTful Web Services project build with Spring Boot and Spring Security…
Read More Swagger and Spring SecurityIn this tutorial, you will learn how to add Swagger or an OpenAPI support to your Spring Boot project so that you can start documenting your REST API. To be able to follow this tutorial you will need to have your REST API Spring Boot project created. If you do not have one, here is…
Read More How to Add Swagger to a Spring Boot REST API ProjectWith this tutorial, I am going to share with you how to convert one Java Model Class into another. You might need to use it when converting a DTO(Data Transfer Object) to an Entity bean and back from Entity bean to a DTO. And also when converting a DTO to a REST Model Object which…
Read More Java Objects Mapping with ModelMapperIn this tutorial, you will learn how to deal with an infinite recursion problem or circular reference, which occurs when you try to return an Object with Bidirectional Relationships in the HTTP response body. Infinite Recursion Problem Let’s look at an example that will cause an Infinite Recursion problem in our RESTful Web Service when we…
Read More Infinite Recursion in Objects with Bidirectional RelationshipsThis short tutorial will teach you how to roll back a database change using @Transactional annotation in your RESTful Web Service built with Spring Boot and JPA. Rollback with @Transactional Annotation Sometimes if an error occurs in our RESTful Web Service, we want to roll back the changes made. For changes to be rolled back…
Read More Rollback Using @Transactional in Spring with JPAIn this blog post, I am going to list commonly used POM.XML dependencies for building RESTful Web services with Spring Boot and Spring MVC. The list of below dependencies is not complete and will depend on the functionality you need your RESTful Web Services to support. But if you are building a simple REST API…
Read More Common POM.XML Dependencies for RESTful Web ServicesWhen building RESTful Web Services we often need to add additional functionality to our project. For example, our application might need to work with a database or be able to cache data or work with LDAP or MongoDB. For our application be able to work with LDAP or MongoDB there are third-party libraries which we…
Read More A List of Spring Boot StartersThe list of below video tutorials is a Quick Start to learning How to Build RESTful Web Services with Spring Framework. Spring Framework is large and there is so much to learn about it. And although there are so many tutorials on the Internet I still felt it would be helpful to create a series…
Read More RESTful Web Services with Spring Framework. Video TutorialsThis tutorial will teach you how to use the @Query annotation to run custom SQL queries. Spring Data JPA provides us with many ready-to-use query methods which allow us to perform basic CRUD(Create, Read, Update and Delete) operations. However, sometimes, even though we have this ready-to-use Query method, we still need to run a custom…
Read More Spring Data JPA Native SQL QueryIn this tutorial on Rest Assured, I am going to share with you how to create a test case which sends HTTP Get Request and includes two Query String Request Parameters. Let’s assume we need to test a RESTful Web Service Endpoint which returns a list of users. The URL to our RESTful Web Service…
Read More Rest Assured HTTP Request with Query ParametersIn this tutorial, you will learn how to validate the request body of an HTTP Post request sent to a RESTful Web Service endpoint built with Spring Boot. Request Body JSON Let’s say you have a RESTful Web Service endpoint that accepts HTTP post requests with the following JSON payload: { “firstName”: “Sergey”, “lastName”: “Kargopolov”,…
Read More Validate Request Body in RESTful Web ServiceIn this tutorial, you will learn how to make a method in your Rest Controller class return a custom HTTP status code. To return a specific HTTP status code from a Spring Controller method in your application, you can use the ResponseEntity class. ResponseEntity with HTTP Status Code Let’s assume we have a simple web…
Read More Return Custom HTTP Status from Spring Controller