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Java Bean Validation Basics 1. Overview In this quick article, we’ll go over the basics of validating a Java bean with the standard framework – JSR 380, also known as Bean Validation 2.0. Validating user input is, of course, a super common requirement in most applications, and the Java Bean… Continue Reading javax-validation
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Hibernate – Mapping Date and Time 1. Introduction In this article, we’ll show how to map temporal column values in Hibernate, including the classes from java.sql, java.util and java.time packages. 2. Project Setup To demonstrate the mapping of the temporal types, we’re going to need the H2 database and the… Continue Reading hibernate-date-time
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Baeldung Weekly Review 32 At the very beginning of last year, I decided to track my reading habits and share the best stuff here, on Baeldung. Haven’t missed a review since. Here we go… 1. Spring and Java ===== >> Spring Framework 4.2 goes GA [spring] I’m upgrading today. Literally.… Continue Reading 2015-week-review-32
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Spring Security with Stormpath 1. Overview Stormpath has developed solid support for Spring Boot and Spring Security – to make the integration with their infrastructure and services quite straightforward. In this article, we’re going to have a look at a minimalistic setup and integration of Stormpath with Spring Security. 2.… Continue Reading spring-security-stormpath
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Control Structures in Java 1. Overview In the most basic sense, a program is a list of instructions. Control structures are programming blocks that can change the path we take through those instructions. In this tutorial, we’ll explore control structures in Java. There are three kinds of control structures: Conditional… Continue Reading java-control-structures
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JUnit 5 TestWatcher API 1. Overview When unit testing, we may, periodically, wish to process the results of our test method executions. In this quick tutorial, we’ll take a look at how we can accomplish this using the TestWatcher API provided by JUnit. For an in-depth guide to testing with… Continue Reading junit-testwatcher
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Check If a String Contains a Substring 1. Overview In this tutorial, we’ll review several ways of checking if a String contains a substring, and we’ll compare the performance of each. 2. String.indexOf Let’s first try using the String.indexOf method. indexOf gives us the first position where the substring is… Continue Reading java-string-contains-substring
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Spring Cloud AWS – S3 In this quick article, we’re going to explore the AWS support provided in the Spring Cloud platform – focusing on S3. 1. Simple S3 Download Let’s start by easily accessing files stored on S3: @Autowired ResourceLoader resourceLoader; public void downloadS3Object(String s3Url) throws IOException { Resource… Continue Reading spring-cloud-aws-s3
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Common String Operations in Java 1. Introduction String-based values and operations are quite common in everyday development, and any Java developer must be able to handle them. In this tutorial, we’ll provide a quick cheat sheet of common String operations. Additionally, we’ll shed some light on the differences between equals and “==”… Continue Reading java-string-operations
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Java String to InputStream 1. Overview In this quick tutorial, we’re going to look at how to convert a standard String to an InputStream using plain Java, Guava and the Apache Commons IO library. This article is part of the “Java – Back to Basic” series here on Baeldung. 2.… Continue Reading convert-string-to-input-stream
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