This tutorial show you how to create a RESTful Java client with RESTEasy client framework, to perform “GET” and “POST” requests to REST service that created in last “Jackson + JAX-RS” tutorial.
Apache HttpClient is a robust and complete solution Java library to perform HTTP operations, including RESTful service. In this tutorial, we show you how to create a RESTful Java client with Apache HttpClient, to perform a “GET” and “POST” request.
In this tutorial, we show you how to create a RESTful Java client with Java build-in HTTP client library. It’s simple to use and good enough to perform basic operations for REST service. The RESTful services from last “Jackson + JAX-RS” article will be reused, and we will use “java.net.URL” and “java.net.HttpURLConnection” to create a simple Java client to send “GET” and “POST” request.
This tutorial shows logging in Java application using the tinylog lightweight logging framework. The tinylog is fast; read this benchmark. The tinylog documentation is very detail and organized, make sure to check it for a detailed explanation.
In Java Logging APIs or java.util.logging, we use system property java.util.logging.config.file to define the location of the logging.properties file. Normally, we put the logging.properties at the src/main/resources, and project compile or build will copy it to the root of the classpath. And we can use LogManager or System.setProperty to load the logging.properties programmatically.
The Java logging APIs (java.util.logging) default loads logging.properties in the $JAVA_HOME/jre/lib/ (Java 8 and before); for Java 9 and above, the logging.properties file moved to $JAVA_HOME/conf.
This article shows how to use HK2 dependency injection framework in Jersey and enable auto-scanning auto-discovery of the declared @Contract and @Service components. Jersey, by default, uses HK2 (Hundred-Kilobyte Kernel) for dependency injection. And the HK2 is an implementation of JSR-330(Dependency Injection for Java). For Jersey and HK2 development, we only need to declare jersey-hk2.
This article shows how to return a JSON response in the Jersey application, using Jackson 2.x. Tested with: Jersey 3.0.2, Grizzly 3 HTTP Server, Jackson 2.12.2 , Java 11, Maven, JUnit 5 and JSONassert 1.5 (Unit Test)
RESTEasy, is required JAXB to support XML file. To use JAXB in RESTEasy, you need to include the “resteasy-jaxb-provider.jar” dependency. In this tutorial, we show you how to create an “user” object, convert it into XML file, and return it back to the client.
Using Jackson as JSON provider in RESTEasy. With RESTEasy auto scanning enabled. When starting up, it hits following errors and failed to start up any of the RESTEasy services: Illegal to inject a message body into a singleton into public org.codehaus.jackson.jaxrs.JacksonJsonProvider