Understanding - Spring Initializr

The Spring Initializr is ultimately a web application that generates a Spring Boot project structure for you.

It can be used from different interfaces.

From Web-based interface (https://start.spring.io or https://start-scs.cfapps.io)
From supported IDEs STS, Eclipse, Netbeans, Intellij Idea. In the case of Eclipse, you need to install a plugin 'STS'.
From CLI (Command Line Interface)

Web-Based UI (the same interface is opened in supported IDEs )

Project: Maven or Gradle

This is the selection of the project built tool or Dependency Manager that is used to manage all the dependencies added in the projects and to compile and pack the project in selected packaging ( jar or war ).

If you want to know more about the selection of built tool and comparison between Maven and Gradle click the below link.

What to choose Maven or Gradle?

Language: This section will is used to select the language in which you are comfortable to write the application logic. I prefer Java.

Spring Boot: Version selection of spring boot release.

Project Metadata:

Group: It is generally the reverse order of domain.
Artifact: Name that helps to describe the function, architecture, and design of software
Name: It is the same as Artifact.
Description: In the description field, we can write a description of the project.
Package Name: It is also similar to the Group name. Generally, it is combined with group and artifact, for better understanding.
Packaging: We can select the packing of the project. We can choose either Jar or War.
Java: We can select the JVM version which we want to use. We will use Java 8 version throughout the tutorial.

Dependencies: Here we can add required dependencies. The basics of them are described below:

Spring Web

Build a web, including RESTful, applications using Spring MVC. Uses Apache Tomcat as the default embedded container.

Spring Security

Highly customizable authentication and access-control framework for Spring applications.

Spring Data JPA

Persist data in SQL stores with Java Persistence API using Spring Data and Hibernate.

MySQL Driver

MySQL JDBC and R2DBC driver.

On clicking the Generate button, this will generate a compressed zip project and starts downloading the zip. If you are using it through IDE it will download and import automatically and if you are using the web interface then you need to import the downloaded zip as a project into your favorite IDE.

How to Implement AWS RDS Database IAM Authentication in Spring Boot

Amazon RDS for MySQL allows authentication using AWS Identity and Access Management (IAM) database authentication. With this authentication method, you don't need to use a password when you connect to a DB instance. Instead, you use an authentication token. Let us understand how this works? An authentication token is a unique string of characters that Amazon RDS generates on request. Authentication tokens are generated using AWS Signature Version 4. Each token has a lifetime of 15 minutes. You don't need to store user credentials in the database, because authentication is managed externally using IAM. You can also still use standard database authentication. Since IAM authentication tokens are short-lived access tokens that are valid for 15 minutes. For the RDS database this token works as a database password that is required to establish a connection and does not determine how long the existing connection can last. The default value for connection to be alive without activit

How to upload files in Amazon S3 Bucket using Spring Boot

As stated in the title, we are going to demonstrate that how we can upload and retrieve files from the amazon s3 bucket in spring boot. For this, we must have an account on amazon web services (AWS) . And the next thing you need to have is an IAM user that has programmatic access to the s3 bucket. Follow the steps below to create an IAM user and s3 bucket. Table of Contents 1. Steps to create an IAM user in AWS with S3 bucket full access permission Step 1.1 Login to your AWS account Step 1.2 Set the user details Step 1.3 Set user permissions Step 1.4 Create a user group and set the access policy Step 1.5 Add user to the group Step 1.6 Set the tags (optional) Step 1.7 Review the user details and permission summary Step 1.8 Download the user credentials 2. See, how to create s3 bucket. Step 2.1 Click on the "Create bucket" button. Step 2.2 Enter the bucket name and select bucket region. Step 2.3 Set file accessibility for bucket items as public/private

What Is SSL Certificate and how it works?

Deep Dive into SSL Certificate What Is an SSL Certificate? SSL (Secure Sockets Layer) is the common name for TLS (Transport Layer Security), a security protocol that enables encrypted communications between two machines. An SSL certificate is a small data file leveraging this security protocol to serve two functions: Authentication – SSL certificates serve as credentials to authenticate the identity of a website. They are issued to a specific domain name and web server after a Certificate Authority, also known as a Certification Authority (CA), performs a strict vetting process on the organization requesting the certificate. Depending on the certificate type, it can provide information about a business or website's identity and authenticate that the website is a legitimate business. Secure data communication - When SSL is installed on a web server, it enables the padlock to appear in the web browser. It activates the HTTPS protocol and creates a secure connection between th

How to Implement Spring Security in Spring Boot

Security Example in Spring Boot Implementation of Spring Security in the Spring Boot application is the key point to learn for spring boot developers. Because Authentication and Authorization are the backbones of the whole application. Getting started with the Spring Security Series, this is the first part, in this article we are going to focus on the authentication part with minimal registration. The implementation of registration flow with email verification, customizing password encoding, and setting up password strengths and rules will be explored in another separate article for each. This article will be the base of the spring security series, the other security features will be explained on the basis of this implementation, so be focused and let's understand. The code contains proper naming & brief comments that makes it very comprehensive. If you feel any difficulty or find any issue, please drop a comment below this post The main goal of this article is to impleme

Request Mapping Annotation in Spring Boot

The @RequestMapping is a class level (also called type level) and method level annotation, it is used to process HTTP requests with specified URL patterns. It is used in and along with both @Controller and @RestController . Table of Contents Request Mapping Annotation in Spring Boot 1. How @RequestMapping annotation it is used? 2. Optional Elements of @RequestMapping 2.1 name, value and path 2.2 headers, consumes and produces 3. Specialization of @RequestMapping 1. How @RequestMapping annotation it is used? @Controller @RequestMapping("/student") public class StudentController{ @RequestMapping("/dashboard") public String dashboard(){ return "dashboard"; } @RequestMapping("result") public String result(){ return "result"; } } We can see in above code sample "/student" , "/dashboard" and "result" passed with annotation are called request value/path present in the URL

Custom Pagination with search and filters in Spring Boot

Every spring boot application is made to manage a large set of data. Also, we need to perform a search and filter the data according to need, And also we cannot load all data in one go on a single page so we need pagination too. In this article, we are going to demonstrate custom pagination with search and filter performed through ajax call. Goal: This demonstration is performed on a set of students' data. We have written a method to generate sample data. Table of Contents 1. Initialize the project with the following dependencies 2. Set the application properties 3. Create the Student entity 4. Enum to denote the class of student 5. Create JPA repository of entity 6. Create the search & filter command object (CO) 7. Create a data transfer object (DTO) of the Entity for returning the response 8. Create a service for implementing the business login 9. Create a controller 10. Create a utility class for date conversions 11. Create the HTML Data Table design 12.

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