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Java Web Weekly, Issue 146 1. Spring and Java ===== >> Securing JAX-RS Endpoints with JWT [antoniogoncalves.org] JWT is becoming the de facto standard in web security yesterday. And JJWT is certainly a good way to go for an implementation. >> Introducing Hibernate Search Sort DSL [in.relation.to] The ElasticSearch support… Continue Reading java-web-weekly-146
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Java Double Brace Initialization 1. Overview In this quick tutorial, we’ll show how double braces can be used for creating and initializing objects in a single Java expression. We’ll also look at why this technique can be considered an anti-pattern. 2. Standard Approach Normally we initialize and populate a set… Continue Reading java-double-brace-initialization
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Get Date Without Time in Java 1. Introduction In this short tutorial, we’ll show how to get a Date without time in Java. We’ll show how to do this before and after Java 8 since things have become a bit different after the release of the new time API in… Continue Reading java-date-without-time
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Replace a Character at a Specific Index in a String in Java 1. Introduction In this quick tutorial, we’ll demonstrate how to replace a character at a specific index in a String in Java. We’ll present four implementations of simple methods that take the original String, a character, and the index… Continue Reading java-replace-character-at-index
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Mapping Nested Values with Jackson 1. Overview A typical use case when working with JSON is to perform a transformation from one model into another. For example, we might want to parse a complex, densely nested object graph into a more straightforward model for use in another domain. In this… Continue Reading jackson-nested-values
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A Guide to DeltaSpike Data Module 1. Overview Apache DeltaSpike is a project which provides a collection of CDI extensions for Java projects; it requires a CDI implementation to be available at runtime. Of course, it can work with the different implementation of CDI – JBoss Weld or OpenWebBeans. It’s also… Continue Reading deltaspike-data-module
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Convert char to String in Java 1. Introduction Converting char to String instances is a very common operation. In this article, we will show multiple ways of tackling this situation. 2. String.valueOf() The String class has a static method valueOf() that is designed for this particular use case. Here you… Continue Reading java-convert-char-to-string
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Gson Deserialization Cookbook In this cookbook, we’re exploring the various ways to unmarshall JSON into Java objects, using the popular Gson library. 1. Deserialize JSON to Single Basic Object Let’s start simple – we’re going to unmarshall a simple json to a Java object – Foo: public class Foo {… Continue Reading gson-deserialization-guide
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Introduction to Protonpack 1. Overview In this tutorial, we’ll look at the major features of Protonpack which is a library that expands the standard Stream API by adding some complimentary functionality. Refer to this write-up here to discover the fundamentals of the Java Stream API. 2. Maven Dependency To use the Protonpack… Continue Reading java-protonpack
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Spring Cache – Creating a Custom KeyGenerator 1. Overview In this quick tutorial, we’re going to illustrate how to create a custom key generator with Spring Cache. For an introduction to the above module, please refer to this article. 2. KeyGenerator This is responsible for generating every key for each… Continue Reading spring-cache-custom-keygenerator
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