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Popular Posts

Best Web Development Frameworks in 2021

The web framework is designed to fortify the development of web applications including web services, web resources, and web APIs. Frameworks are, in short, libraries that avail you to develop your application more expeditious and smarter. The web framework preserves time, makes the development process going more expeditious because developers do not waste time writing thousands of lines of code to create common things that have been already created, they can fixate on making the project unique. The web framework will provide ease of maintenance and application security. Here is the list of best Web Development Frameworks from the 2020s, Java Web Frameworks 1.Spring: The Spring Framework is a potent, lightweight web application development framework to develop complex web applications that require high performance. The core features of the Spring Framework enable Java developers to engender enterprise-level applications with facileness. Spring provides many modules, like Spring Boot,

Spring Boot + JPA/Hibernate One to Many mapping example

Hello everyone, In this tutorial, we will learn how to implement one-to-many entity mapping using JPA/Hibernate with Spring Boot, Spring Data JPA, and H2DB database. Project Structure See the final project structure of this tutorial. Maven[pom.xml] A Project Object Model or POM is the fundamental unit of work in Maven. It is an XML file that contains information about the project and configuration details utilized by Maven to build the project. It contains default values for most projects. Some of the configurations that can be designated in the POM is the project dependencies, the plugins or goals that can be executed, the build profiles, and so on. Other information such as the project version, description, developers, mailing lists, and such can withal be designated. <?xml version = "1.0" encoding = "UTF-8" ?> <project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance"

Spring Boot-Authentication and Authorization with Spring Security & JWT

Hello everyone, today we will learn how to handle authentication and authorization on RESTful APIs written with Spring Boot. GitHub repository link is provided at the end of this tutorial. You can download the source code. Technologies used Spring boot is used to develop REST web services and microservices. Spring Boot has taken the Spring framework to the next level. It has drastically reduced the configuration and setup time required for spring projects. We can set up a project with almost zero configuration and start building the things that actually matter to your application. Spring Security is a Java/Java EE framework that provides authentication, authorization, and other security features for enterprise applications. JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed. JWTs can be sign

Spring boot video streaming example-HTML5

Hello everyone, Today we will learn how to stream MP4 video using Spring. You can download the source code of this simple application from our GitHub repository. The Source code download Link is provided at the end of this post. User Interface Project Structure Maven(pom.xml) A Project Object Model or POM is the fundamental unit of work in Maven. It is an XML file that contains information about the project and configuration details utilized by Maven to build the project. It contains default values for most projects. <? xml version ="1.0" encoding ="UTF-8" ?> < project xmlns ="http://maven.apache.org/POM/4.0.0" xmlns: xsi ="http://www.w3.org/2001/XMLSchema-instance" xsi :schemaLocation ="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" > < modelVersion > 4.0.0 </ modelVersion > < parent > < groupId > org.springfram

DataTable-Pagination example with Spring boot, jQuery and ajax

Hello everyone, Today we will show you the DataTable-Pagination example with Spring boot, jQuery, and ajax. The link to download the source code is provided at the end of this post. Following technologies stack being used: Spring Boot 2.1.1.RELEASE Spring 5.1.3.RELEASE Maven 3 Datatable jQuery Free Marker javascript ajax Project Structure pom.xml <? xml version ="1.0" encoding ="UTF-8" ?> < project xmlns ="http://maven.apache.org/POM/4.0.0" xmlns: xsi ="http://www.w3.org/2001/XMLSchema-instance" xsi :schemaLocation ="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" > < modelVersion > 4.0.0 </ modelVersion > < parent > < groupId > org.springframework.boot </ groupId > < artifactId > spring-boot-starter-parent </ artifactId > < version >

Java -Blowfish Encryption and decryption with Example

Blowfish is a symmetric-key block cipher, designed in 1993 by Bruce Schneier and included in many cipher suites and encryption products. Blowfish provides a good encryption rate in software and no effective cryptanalysis of it has been found to date. However, the Advanced Encryption Standard (AES) now receives more attention, and Schneier recommends Twofish for modern applications. Example: package com.knowledgefactory; import java.io.UnsupportedEncodingException; import java.nio.charset.Charset; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.util.Base64; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.SecretKeySpec; /** * This program demonstrates how to encrypt/decrypt input using the Blowfish * Cipher with the Java Cryptograhpy. * */ public class BlowfishKnowledgeFactory {

React Native - Rest API calls using Axios - Mobile App development

Congratulations! You are standing in the right place! In this article, we will discuss how to use Axios to access the Rest API within a React application. We are going to create a mobile app like below, Implementation: You must set up your local development environment. Follow the below link to set up your local environment. https://www.knowledgefactory.net/2021/01/react-native-environment-setup-create-demo.html After executing the commands mentioned in this link , a folder with a specified name is created with the following contents. Next, we are going to edit the App.js file and write the below code. import React, { useEffect, useState } from 'react' ; import { FlatList, Text, View } from 'react-native' ; import axios from 'axios' export default App = () => { const [isLoading, setLoading] = useState( true ); const [data, setData] = useState([]); console.log(data); useEffect(() => { axios( 'https://r

Spring Boot + Mockito simple application with 100% code coverage

In this article, we will show you a sample Spring example to demonstrate test methods for Controllers, Service, and Repository, And code coverage analysis using the EclEmma plugin. Technologies used: Spring Boot 2.1.1.RELEASE Spring MVC 5.1.1.RELEASE H2DB 1.4.197 Mockito 2 Maven EclEmma plugin Junit 4 A quick overview of Spring Boot, Mockito, and EclEmma plugin Spring boot : Spring boot to develop REST web services and microservices. Spring Boot has taken the Spring framework to the next level. It has drastically reduced the configuration and setup time required for spring projects. We can set up a project with almost zero configuration and start building the things that actually matter to your application. Mockito : Mockito is a mocking framework, a JAVA-predicated library that is utilized for efficacious unit testing of JAVA applications. Mockito is utilized to mock interfaces so that a dummy functionality can be integrated into a mock interface that can be utilized in

React.js + Python + MongoDB CRUD application-Full stack development foundation

Hello everyone, today we will learn how to develop a web application that is a basic User Management Application using MongoDB, React.js, Python, and Flask. GitHub repository link is provided at the end of this tutorial. You can download the source code. Architecture We’re gonna build the application with the following architecture: After completing this tutorial what we will build? We will build a full-stack web application that is a basic User Management Application with CRUD features: • Create User • List User • Update User • Delete User • View User Following is the screenshot of our application - -Retrieve all Users: -Add a User: -Update User: -User by ID: We divided this tutorial into two parts. PART 1 - Rest APIs Development using Python and Flask PART 2 - UI development using React.js PART 1 - Rest APIs Development using Python and Flask These are APIs that Python Flask App will export: GET all User's : /api/v1/users GET User by ID :

Spring Boot Export data to PDF example

Hello everyone, today we will learn how to export and download the data as a PDF file in a Spring Boot project. PDF stands for the Portable Document Format , used to exhibit documents in an electronic form independent of the software, hardware, or operating system they are viewed on. Technologies used: Spring Boot iText PDF H2DB Spring Data JPA Project Directory: Maven[pom.xml] A Project Object Model or POM is the fundamental unit of work in Maven. It is an XML file that contains information about the project and configuration details utilized by Maven to build the project. It contains default values for most projects. Some of the configurations that can be designated in the POM is the project dependencies, the plugins or goals that can be executed, the build profiles, and so on. Other information such as the project version, description, developers, mailing lists, and such can withal be designated. <?xml version = "1.0" encoding = "UTF-8" ?> <project

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