Spring Framework

by 0 comments on "Spring Method-Level Security with @PreAuthorize"

In this Spring Boot Security tutorial, you will learn how to use Spring method-level security to secure RestController methods with @PreAuthorize annotation. If you are interested in video lessons, then I also show how to create user Roles and Authorities and how to use Spring Method Level Security annotations in my video course: RESTful Web…

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by 0 comments on "Spring MVC: Reading URI Path Variables"

This tutorial will teach you how to retrieve URI path variables in your Spring MVC web application. Define Path Variable To define a path variable in the URI path, we use curly brackets. For example, the @GetMapping annotation below specifies one path variable called userId, which is surrounded by curly brackets. @GetMapping(path=”/users/{userId}”) @PathVariable Annotation To…

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This tutorial will guide you on how to incorporate JUnit support into your Spring Boot application based on Maven. Spring Boot Starter Test Dependency To add JUnit and Mockito support to your Maven-based Spring Boot application, include the following dependencies in the <dependencies> section of your pom.xml file: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> By adding…

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In the software development process, testing is essential. There are two types of testing i.e. unit testing and integration testing. While unit testing focuses on testing the smallest component of an application, integration testing focuses on testing the end-to-end behavior of the application also known as endpoint testing. Integration testing verifies the @Controller and @RestController…

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by 0 comments on "How to use Project Lombok in Spring Boot"

This tutorial will teach you how to use project Lombok in the Spring Boot application. Overview No doubt Java is a wonderful language, but one of the drawbacks of Java is its verbose nature. This makes it fairly complicated for everyday tasks such as composing a simple POJO object. For example, constructing of methods like Getters(), Setters(),…

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by 1 comment on "Spring Security In-Memory Authentication"

This tutorial will teach you how to add Spring Security to your project and enable in-memory basic authentication. You will learn how to configure two different users with different Roles and Privileges. Both users’ roles and privileges will be stored in the memory of your Spring Boot application. If you use Spring Framework and OAuth,…

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by 0 comments on "User Authentication with Amazon Cognito in Spring Boot Application"

In this article, you will learn how to perform user authentication with Amazon Cognito in a Spring Boot application. But before we dive into that, let’s first explore what Amazon Cognito is. According to what’s mentioned on the AWS official website: Amazon Cognito lets you add user sign-up, sign-in, and access control to your web…

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Dependency injection is a design pattern in which a component’s dependencies are supplied externally rather than being hardcoded within the component itself. In Spring, developers mainly use 3 different types of dependency injection: constructor-based, setter-based, and field-based. In this tutorial, we will see how to use Setter-based Dependency Injection to inject a UsersRepository into a…

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Spring is a popular Java-based framework for building applications. One of its core features is dependency injection, which is used to manage the relationships between objects and to make it easier to manage the dependencies in an application. In this tutorial, we will explore two of the main methods of dependency injection in Spring: constructor…

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by 0 comments on "Start Spring Boot App on a Random Port Number"

This tutorial will teach you how to start your Spring Boot application on a random port number. Starting an application on a random port number is very helpful when you need to start multiple instances of the same Spring Boot application and then balance HTTP requests between the running instances. If you want to learn…

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In this article, we will learn about Many-to-Many relationships in JPA and how to implement them in a Spring Boot application. Let’s get started! @ManytoMany annotation A many-to-many relationship occurs when multiple records in one table are associated with multiple records in another table. The @ManyToMany annotation is used to define a many-valued association with…

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Dependency Injection is a design pattern that allows the separation of concerns in an application by removing the hard-coded dependencies between objects. In Dependency Injection, the objects are provided with their dependencies instead of having to hard-code them. This makes the application more flexible, maintainable, and easier to test. Spring Framework provides several ways to…

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