Spring WebClient and OAuth2 Support
1. Overview Spring Security 5 provides OAuth2 support for Spring Webflux’s non-blocking WebClient class. In this tutorial, we’ll analyze different approaches to access secured resources using this […]
JAVA
Spring WebClient Filters
1. Overview In this tutorial, we’re going to explore WebClient filters in Spring WebFlux, a functional, reactive web framework. 2. Request Filters A filter can intercept, examine, and […]
Spring WebClient Requests with Parameters
1. Overview A lot of frameworks and projects are introducing reactive programming and asynchronous request handling. Consequently, Spring 5 introduced a reactive WebClient implementation as a part of the WebFlux framework. In […]
Spring WebClient vs. RestTemplate
1. Introduction In this tutorial, we’re going to compare two of Spring’s web client implementations – RestTemplate and new Spring 5’s reactive alternative WebClient. 2. Blocking vs. Non-Blocking […]
Uploading MultipartFile with Spring RestTemplate
1. Overview This quick tutorial focuses on how to upload a multipart file using Spring’s RestTemplate. We’ll see both a single file and multiple files – upload using […]
Spring RestTemplate Error Handling
1. Overview In this short tutorial, we’ll discuss how to implement and inject the ResponseErrorHandler interface in a RestTemplate instance – to gracefully handle HTTP errors returned by remote […]
Configure a RestTemplate with RestTemplateBuilder
1. Introduction In this quick tutorial, we’re going to look at how to configure a Spring RestTemplate bean. Let’s start by discussing the three main configuration types: using […]
Get and Post Lists of Objects with RestTemplate
1. Introduction The RestTemplate class is the central tool for performing client-side HTTP operations in Spring. It provides several utility methods for building HTTP requests and handling […]
Basic Authentication with the RestTemplate
1. Overview This article shows how to use Springs RestTemplate to consume a RESTful Service secured with Basic Authentication. Once Basic Authentication is set up for the template, […]
RestTemplate Post Request with JSON
1. Introduction In this quick tutorial, we illustrate how to use Spring’s RestTemplate to make POST requests sending JSON content. 2. Setting Up the Example Let’s start […]
The Guide to RestTemplate
1. Overview In this tutorial, we’re going to illustrate the broad range of operations where the Spring REST Client — RestTemplate — can be used, and used […]
Test a REST API with Java
1. Overview This tutorial focuses on the basic principles and mechanics of testing a REST API with live Integration Tests (with a JSON payload). The main goal […]
Setting a Request Timeout for a Spring REST API
1. Overview In this tutorial, we’ll explore a few possible ways to implement request timeouts for a Spring REST API. We’ll discuss the benefits and drawbacks […]
Spring REST API + OAuth2 + Angular
1. Overview In this tutorial, we’ll secure a REST API with OAuth2 and consume it from a simple Angular client. The application we’re going to build […]
Generate Spring Boot REST Client with Swagger
1. Introduction In this article, we’ll use the Swagger Codegen and OpenAPI Generator projects to generate REST clients from an OpenAPI/Swagger spec file. Also, we’ll create a Spring Boot project, where […]
Handling URL Encoded Form Data in Spring REST
1. Overview For an end-user, the process of form submission is convenient, and to some extent, equivalent to just entering data and clicking on a […]
A Custom Media Type for a Spring REST API
1. Overview In this tutorial, we’re going to take a look at defining custom media types and producing them by Spring REST controller. A good […]
Spring REST API with Protocol Buffers
1. Overview Protocol Buffers is a language and platform neutral mechanism for serialization and deserialization of structured data, which is proclaimed by Google, its creator, to […]
Spring MVC Content Negotiation
1. Overview This article describes how to implement content negotiation in a Spring MVC project. Generally, there are three options to determine the media type […]
ETags for REST with Spring
1. Overview This article will focus on working with ETags in Spring, integration testing of the REST API and consumption scenarios with curl. 2. REST and ETags […]
