PHP + React JS + MySQL CRUD Example

Hello everyone, today we will learn how to develop a full-stack web application that is a basic User Management Application using PHP, React JS and MySQL.
The GitHub repository link is provided at the end of this tutorial. You can download the source code.

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

-Add User:


-Retrieve all Users:

-View User:

-Update User:

We divided this tutorial into two parts. 

PART 1 - Rest APIs Development using PHP and MySQL
PART 2 - UI development using React JS

PART 1 - Rest APIs Development using PHP

Project Directory



Setting Up Database

Create Database "user_db" and create table "user"

--
-- Database: `user_db`
--
-- --------------------------------------------------------
--
-- Table structure for table `user`
--

CREATE TABLE `user` (
  `id` bigint(20) UNSIGNED NOT NULL,
  `first_name` varchar(50) NOT NULL,
  `last_name` varchar(50) NOT NULL,
  `email_id` varchar(50) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

ALTER TABLE `user`
  ADD UNIQUE KEY `id` (`id`);

ALTER TABLE `user`
  MODIFY `id` bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=70;
COMMIT;


Database Connection [database.php]

<?php 
    class DB {
        private $host = "localhost";
        private $db = "user_db";
        private $username = "root";
        private $password = "";

        public $conn;

        public function getConnection(){
            $this->conn = null;
            try{
                $this->conn = new PDO("mysql:host=" . $this->host .
                 ";dbname=" . $this->db, $this->username, $this->password);
                $this->conn->exec("set names utf8");
            }catch(PDOException $exception){
                echo "Database not connected: " . $exception->getMessage();
            }
            return $this->conn;
        }
    }  
?>


Create User Class[user.php]

<?php
    class User{

        // conn
        private $conn;

        // table
        private $dbTable = "user";

        // col
        public $id;
        public $first_name;
        public $last_name;
        public $email_id;
      
        // db conn
        public function __construct($db){
            $this->conn = $db;
        }

        // GET Users
        public function getUsers(){
            $sqlQuery = "SELECT id, first_name, last_name, email_id
               FROM " . $this->dbTable . "";
            $stmt = $this->conn->prepare($sqlQuery);
            $stmt->execute();
            return $stmt;
        }

        // CREATE User
        public function createUser(){
            $sqlQuery = "INSERT INTO
                        ". $this->dbTable ."
                    SET
                    first_name = :first_name, 
                    last_name = :last_name, 
                    email_id = :email_id";
        
            $stmt = $this->conn->prepare($sqlQuery);
        
            // sanitize
            $this->first_name=htmlspecialchars(strip_tags($this->first_name));
            $this->last_name=htmlspecialchars(strip_tags($this->last_name));
            $this->email_id=htmlspecialchars(strip_tags($this->email_id));
                   
            // bind data
            $stmt->bindParam(":first_name", $this->first_name);
            $stmt->bindParam(":last_name", $this->last_name);
            $stmt->bindParam(":email_id", $this->email_id);
           
        
            if($stmt->execute()){
               return true;
            }
            return false;
        }

       // GET User
       public function getSingleUser(){
        $sqlQuery = "SELECT
                    id, 
                    first_name, 
                    last_name, 
                    email_id
                  FROM
                    ". $this->dbTable ."
                WHERE 
                   id = ?
                LIMIT 0,1";

        $stmt = $this->conn->prepare($sqlQuery);
        $stmt->bindParam(1, $this->id);
        $stmt->execute();
        $dataRow = $stmt->fetch(PDO::FETCH_ASSOC);
        
        $this->first_name = $dataRow['first_name'];
        $this->last_name = $dataRow['last_name'];
        $this->email_id = $dataRow['email_id'];
      
    }      
        

        // UPDATE User
        public function updateUser(){
            $sqlQuery = "UPDATE
                        ". $this->dbTable ."
                    SET
                    first_name = :first_name, 
                    last_name = :last_name, 
                    email_id = :email_id
                    WHERE 
                        id = :id";
        
            $stmt = $this->conn->prepare($sqlQuery);
        
            $this->first_name=htmlspecialchars(strip_tags($this->first_name));
            $this->last_name=htmlspecialchars(strip_tags($this->last_name));
            $this->email_id=htmlspecialchars(strip_tags($this->email_id));
            $this->id=htmlspecialchars(strip_tags($this->id));
        
            // bind data
            $stmt->bindParam(":first_name", $this->first_name);
            $stmt->bindParam(":last_name", $this->last_name);
            $stmt->bindParam(":email_id", $this->email_id);
            $stmt->bindParam(":id", $this->id);
        
            if($stmt->execute()){
               return true;
            }
            return false;
        }

        // DELETE User
        function deleteUser(){
            $sqlQuery = "DELETE FROM " . $this->dbTable . " WHERE id = ?";
            $stmt = $this->conn->prepare($sqlQuery);
        
            $this->id=htmlspecialchars(strip_tags($this->id));
        
            $stmt->bindParam(1, $this->id);
        
            if($stmt->execute()){
                return true;
            }
            return false;
        }

    }
?>


Create User [create.php]

<?php
   
   header("Access-Control-Allow-Origin: *");
   header("Content-Type: application/json;");
   header("Access-Control-Allow-Methods: POST");
   header("Access-Control-Max-Age: 3600");
   header("Access-Control-Allow-Headers: Content-Type,
           Access-Control-Allow-Headers, Authorization, X-Requested-With");

    include_once 'config/database.php';
    include_once 'class/user.php';

    $database = new DB();
    $db = $database->getConnection();

    $item = new User($db);

    $data = json_decode(file_get_contents("php://input"));

    $item->first_name = $data->first_name;
    $item->last_name = $data->last_name;
    $item->email_id = $data->email_id;
      
    if($item->createUser()){
        echo json_encode("User created.");
    } else{
        echo json_encode("Failed to create user.");
    }
?>



Get User Records [read.php]

<?php
    header("Access-Control-Allow-Origin: *");
    header("Content-Type: application/json;");
    
    include_once 'config/database.php';
    include_once 'class/user.php';

    $database = new DB();
    $db = $database->getConnection();

    $items = new User($db);

    $stmt = $items->getUsers();
    $itemCount = $stmt->rowCount();

    if($itemCount > 0){
        
        $userArr = array();
       

        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
            extract($row);
            $e = array(
                "id" => $id,
                "first_name" => $first_name,
                "last_name" => $last_name,
                "email_id" => $email_id
            );

            array_push($userArr, $e);
        }
        echo json_encode($userArr);
    }
    else{
        echo json_encode();
    }

?>


Get User By Id [single_user.php]

<?php
    header("Access-Control-Allow-Origin: *");
    header("Access-Control-Allow-Headers: X-Requested-With, 
    Content-Type, Origin, Cache-Control, Pragma, Authorization, 
    Accept, Accept-Encoding");
    header("Content-Type: application/json;");
    
    include_once 'config/database.php';
    include_once 'class/user.php';

    $database = new DB();
    $db = $database->getConnection();

    $item = new User($db);

    $item->id = isset($_GET['id']) ? $_GET['id'] : die();
  
    $item->getSingleUser();

    if($item != null){
        $user_Arr = array(
            "id" =>  $item->id,
            "first_name" => $item->first_name,
            "last_name" => $item->last_name,
            "email_id" => $item->email_id
        );
      
        http_response_code(200);
        echo json_encode($user_Arr);
    }
      
    else{
        http_response_code(404);
        echo json_encode("User record not found.");
    }
?>



Update User [update.php]

<?php
 
 header("Access-Control-Allow-Origin: *");
 header("Content-Type: application/json; charset=UTF-8");
 header("Access-Control-Allow-Methods: GET,POST,PUT,DELETE");
 header("Access-Control-Max-Age: 3600");
 header("Access-Control-Allow-Headers: Content-Type,
        Access-Control-Allow-Headers, Authorization, X-Requested-With");
 

 include_once 'config/database.php';
    include_once 'class/user.php';
    
    $database = new DB();
    $db = $database->getConnection();
    
    $item = new User($db);
    
    $data = json_decode(file_get_contents("php://input"));
    
    $item->id = $data->id;
    $item->first_name = $data->first_name;
    $item->last_name = $data->last_name;
    $item->email_id = $data->email_id;
   
    
    if($item->updateUser()){
        echo json_encode("User record updated.");
    } else{
        echo json_encode("User record could not be updated.");
    }
?>


Delete User [delete.php]

<?php

    header("Access-Control-Allow-Origin: *");
    header("Content-Type: application/json; charset=UTF-8");
    header("Access-Control-Allow-Methods: GET,POST,PUT,DELETE");
    header("Access-Control-Max-Age: 3600");
    header("Access-Control-Allow-Headers: Content-Type,
        Access-Control-Allow-Headers, Authorization, X-Requested-With");
   
      
    include_once 'config/database.php';
    include_once 'class/user.php';
    
    $database = new DB();
    $db = $database->getConnection();
    $item = new User($db);    
    $item->id = isset($_GET['id']) ? $_GET['id'] : die();
    
    if($item->deleteUser()){
        echo json_encode("User deleted.");
    } else{
        echo json_encode("Not deleted");
    }
?>




PART 2 - UI Development using React.js

Project Structure



package.json

It is used by the npm CLI (and yarn) to identify your project and understand how to handle the project's dependencies. It's the package. json file that enables npm to start your project, run scripts, install dependencies, publish to the NPM registry, and many other useful tasks.
{
    "name": "react-frontend",
    "version": "0.1.0",
    "private": true,
    "dependencies": {
        "@testing-library/jest-dom": "^4.2.4",
        "@testing-library/react": "^9.5.0",
        "@testing-library/user-event": "^7.2.1",
        "axios": "^0.19.2",
        "bootstrap": "^4.5.0",
        "react": "^16.13.1",
        "react-dom": "^16.13.1",
        "react-router-dom": "^5.2.0",
        "react-scripts": "3.4.1"
    },
    "scripts": {
        "start": "react-scripts start",
        "build": "react-scripts build",
        "test": "react-scripts test",
        "eject": "react-scripts eject"
    },
    "eslintConfig": {
        "extends": "react-app"
    },
    "browserslist": {
        "production": [
            ">0.2%",
            "not dead",
            "not op_mini all"
        ],
        "development": [
            "last 1 chrome version",
            "last 1 firefox version",
            "last 1 safari version"
        ]
    }
}



CreateUserComponent.jsx


import React, { Component } from 'react'
import UserService from '../services/UserService';
class CreateUserComponent extends Component {
    constructor(props) {
        super(props)
        this.state = {
            // step 2
            id: this.props.match.params.id,
            first_name: '',
            last_name: '',
            email_id: ''
        }
        this.changeFirstNameHandler = this.changeFirstNameHandler.bind(this);
        this.changeLastNameHandler = this.changeLastNameHandler.bind(this);
        this.saveOrUpdateUser = this.saveOrUpdateUser.bind(this);
    }
    // step 3
    componentDidMount() {
        // step 4
        if (this.state.id === '_add') {
            return
        } else {
            UserService.getUserById(this.state.id).then((res) => {
                let user = res.data;
                this.setState({
                    first_name: user.first_name,
                    last_name: user.last_name,
                    email_id: user.email_id
                });
            });
        }
    }
    saveOrUpdateUser = (e) => {
        e.preventDefault();
        let user = {
            id: this.state.id,
            first_name: this.state.first_name, 
            last_name: this.state.last_name,
            email_id: this.state.email_id
        };
        console.log('user => ' + JSON.stringify(user));
        // step 5
        if (this.state.id === '_add') {
            UserService.createUser(user).then(res => {
                this.props.history.push('/users');
            });
        } else {
            UserService.updateUser(user).then(res => {
                this.props.history.push('/users');
            });
        }
    }
    changeFirstNameHandler = (event) => {
        this.setState({ first_name: event.target.value });
    }
    changeLastNameHandler = (event) => {
        this.setState({ last_name: event.target.value });
    }
    changeEmailHandler = (event) => {
        this.setState({ email_id: event.target.value });
    }
    cancel() {
        this.props.history.push('/users');
    }
    getTitle() {
        if (this.state.id === '_add') {
            return <h3 className="text-center">Add User</h3>
        } else {
            return <h3 className="text-center">Update User</h3>
        }
    }
    render() {
        return (
            <div>
                <br></br>
                <div className="container">
                    <div className="row">
                        <div className="card col-md-6 offset-md-3 offset-md-3">
                            {
                                this.getTitle()
                            }
                            <div className="card-body">
                                <form>
                                    <div className="form-group">
                                        <label> First Name: </label>
   <input placeholder="First Name" name="first_name" className="form-control"
    value={this.state.first_name} onChange={this.changeFirstNameHandler} />
                                    </div>
                                    <div className="form-group">
                                        <label> Last Name: </label>
      <input placeholder="Last Name" name="last_name" className="form-control"
          value={this.state.last_name} onChange={this.changeLastNameHandler} />
                                    </div>
                                    <div className="form-group">
                                        <label> Email Id: </label>
   <input placeholder="Email Address" name="email_id" className="form-control"
           value={this.state.email_id} onChange={this.changeEmailHandler} />
                                    </div>
  <button className="btn btn-success" onClick={this.saveOrUpdateUser}>
                                 Save</button>
   <button className="btn btn-danger" onClick={this.cancel.bind(this)} style=
                                        {{ marginLeft: "10px" }}>Cancel</button>
                                </form>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        )
    }
}
export default CreateUserComponent




ListUserComponent.jsx

import React, { Component } from 'react'
import UserService from '../services/UserService'
class ListUserComponent extends Component {
    constructor(props) {
        super(props)
        this.state = {
            users: []
        }
        this.addUser = this.addUser.bind(this);
        this.editUser = this.editUser.bind(this);
        this.deleteUser = this.deleteUser.bind(this);
    }
    deleteUser(id) {
        UserService.deleteUser(id).then(res => {
            this.setState({ users: this.state.users.filter(user => 
                            user.id !== id) });
        });
    }
    viewUser(id) {
        this.props.history.push(`/view-user/${id}`);
    }
    editUser(id) {
        this.props.history.push(`/add-user/${id}`);
    }
    componentDidMount() {
        UserService.getUsers().then((res) => {
            this.setState({ users: res.data });
        });
    }
    addUser() {
        this.props.history.push('/add-user/_add');
    }
    render() {
        return (
            <div>
                <h2 className="text-center">Users List</h2>
                <div className="row">
                    <button className="btn btn-primary" onClick={this.addUser}> 
                          Add User</button>
                </div>
                <br></br>
                <div className="row">
                    <table className="table table-striped table-bordered">
                        <thead>
                            <tr>
                                <th> User First Name</th>
                                <th> User Last Name</th>
                                <th> User Email Id</th>
                                <th> Actions</th>
                            </tr>
                        </thead>
                        <tbody>
                            {
                                this.state.users.map(
                                    user =>
                                        <tr key={user.id}>
                                            <td> {user.first_name} </td>
                                            <td> {user.last_name}</td>
                                            <td> {user.email_id}</td>
                                            <td>
     <button onClick={() => this.editUser(user.id)} className="btn btn-warning">
                Update </button>
         <button style={{ marginLeft: "10px" }} onClick=
  {() => this.deleteUser(user.id)} className="btn btn-danger">Delete </button>
          <button style={{ marginLeft: "10px" }} onClick=
  {() => this.viewUser(user.id)} className="btn btn-info">View </button>
                                            </td>
                                        </tr>
                                )
                            }
                        </tbody>
                    </table>
                </div>
            </div>
        )
    }
}
export default ListUserComponent


ViewUserComponent.jsx

import React, { Component } from 'react'
import UserService from '../services/UserService'
class ViewUserComponent extends Component {
    constructor(props) {
        super(props)
        this.state = {
            id: this.props.match.params.id,
            user: {}
        }
    }
    componentDidMount() {
        UserService.getUserById(this.state.id).then(res => {
            this.setState({ user: res.data });
        })
    }
    render() {
        return (
            <div>
                <br></br>
                <div className="card col-md-6 offset-md-3">
                    <h3 className="text-center"> View User Details</h3>
                    <div className="card-body">
                        <div className="row">
                            <label> User First Name: </label>
                            <div> {this.state.user.first_name}</div>
                        </div>
                        <div className="row">
                            <label> User Last Name: </label>
                            <div> {this.state.user.last_name}</div>
                        </div>
                        <div className="row">
                            <label> User Email ID: </label>
                            <div> {this.state.user.email_id}</div>
                        </div>
                    </div>
                </div>
            </div>
        )
    }
}
export default ViewUserComponent


UserService.js

import axios from 'axios';

const USER_API_URL = "http://localhost:8080/php-mysql-crud-api";

class UserService {

    getUsers(){
        return axios.get(`${USER_API_URL}/read.php`);
    }

    createUser(user){
        return axios.post(`${USER_API_URL}/create.php`, user);
    }

    getUserById(id){
        return axios.get(`${USER_API_URL}/single_user.php`, 
            { params: { id: id } });
    }

    updateUser(user){
        return axios.put(`${USER_API_URL}/update.php`, user);
    }

    deleteUser(id){
        return axios.delete(`${USER_API_URL}/delete.php`, 
                                    { params: { id: id } });
    }
}

export default new UserService()


App.css

.App {
  text-align: center;
}

.App-logo {
  height: 40vmin;
  pointer-events: none;
}

@media (prefers-reduced-motion: no-preference) {
  .App-logo {
    animation: App-logo-spin infinite 20s linear;
  }
}

.App-header {
  background-color: #282c34;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: calc(10px + 2vmin);
  color: white;
}

.App-link {
  color: #61dafb;
}

@keyframes App-logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.footer {
  position: absolute;
  bottom: 0;
  width:100%;
  height: 50px;
  background-color: black;
  text-align: center;
  color: white;
}



App.js

import React from 'react';
import './App.css';
import {BrowserRouter as Router, Route, Switch} from 'react-router-dom'
import ListUserComponent from './components/ListUserComponent';
import HeaderComponent from './components/HeaderComponent';
import FooterComponent from './components/FooterComponent';
import CreateUserComponent from './components/CreateUserComponent';
import ViewUserComponent from './components/ViewUserComponent';

function App() {
  return (
    <div>
        <Router>
              <HeaderComponent />
                <div className="container">
                    <Switch> 
  <Route path = "/" exact component = {ListUserComponent}></Route>
  <Route path = "/users" component = {ListUserComponent}></Route>
  <Route path = "/add-user/:id" component = {CreateUserComponent}>
        </Route>
  <Route path = "/view-user/:id" component = {ViewUserComponent}>
        </Route>
                    </Switch>
                </div>
              <FooterComponent />
        </Router>
    </div>
    
  );
}

export default App;



index.css

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 
       'Roboto', 'Oxygen',
         'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 
           'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}



index.js

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import * as serviceWorker from './serviceWorker';
import 'bootstrap/dist/css/bootstrap.min.css';

ReactDOM.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
  document.getElementById('root')
);

serviceWorker.unregister();

Download the complete source code - click here


Run


npm install 


 npm start





Download the source code

Popular posts from this blog

Learn Java 8 streams with an example - print odd/even numbers from Array and List

Example 1: Java 8 program to print odd numbers from a List   import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; /*Java 8 Program to find Odd Numbers from a List*/ public class DriverClass { public static void main( String [] args) { List < Integer > numbers = Arrays. asList( 1 , 4 , 8 , 40 , 11 , 22 , 33 , 99 ); List < Integer > oddNumbers = numbers.stream(). filter(o -> o % 2 != 0 ). collect(Collectors.toList()); System.out.println(oddNumbers); } } 1. Initialize List using Arrays.asList() method. Java's built-in Arrays.asList() method converts an array into a list. This method takes an array as an argument and returns a List object. 2.  Java List interface provides stream() method which returns a sequential Stream with list of Integer as its source. 3. The Java stream filter() method allow
Read more

Java Stream API - How to convert List of objects to another List of objects using Java streams?

Image
In this section, we will show you how to convert a List of objects to another List of objects in Java using the Java streams map(). The ‘map’ method maps each element to its corresponding result. Java Stream API   The Java Stream API provides a functional programming approach over the object oriented capabilities of Java. It is used for processing collections of objects. The Stream in Java can be defined as a sequence of elements from a source List, Set or Array. Most of the stream operations return a Stream. This avails engender a chain of stream operations(stream pipe-lining). The streams withal support the aggregate or terminal operations on the elements. for example, finding the sum or maximum element or finding the average etc...Stream operations can either be executed sequentially or parallel. when performed parallelly, it is called a parallel stream.   Stream map() Method   The Java 8 Stream map() is an intermediate operation. It converts Stream<obj1> to Stream<obj2>
Read more

Registration and Login with Spring Boot + Spring Security + Thymeleaf

Image
In this section, we will learn how to create user registration and login using Spring boot, Spring security, Thymeleaf, JPA, and H2DB. The GitHub repository link is provided at the end of this tutorial. You can download the source code. Technologies used: Spring Boot 2.5.5  Spring Data JPA  Spring Security  Thymeleaf  Maven 3+  Java 17  H2 Database   User Interface User Registration Authentication Failed Authentication success Sign out Final Project Structure: Complete 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-pare
Read more

Java, Spring Boot Mini Project - Library Management System - Download

Image
Hello everyone, Hope you are doing well. Here, we provide a Library Management System mini-project for beginners, it's free for download. Maybe you can build more on top of this project and create your own product, that's all about you. The source code download link is provided at the end of this post. 1. Benefit of this project You could cover the following technologies and features by learning and debugging this mini project. Java 17 Java Stream Java Lamda Expressions Java Records Functional programming Object-oriented programming var Keyword in Java Generics in Java Java Switch Spring boot 2.6.4 Spring Security Thymeleaf template engine OpenCSV Spring Data JPA Server Side Pagination H2 Database  Bootstrap HTML CSS and more... 2. Objective Of Spring Boot On Library Management System The main objective of this project is to manage the details of the books, author, category, and publisher. Only Admin/Librarian will manage all these activities. Also, they can export the data in
Read more

ReactJS, Spring Boot JWT Authentication Example

Image
In this tutorial, we’ll create a user registration & login example using ReactJS, Spring Boot, Spring Security, and JWT authentication. You could download the source code from our Github repository, the download link is provided at the end of this tutorial. Technologies used Backend Technologies: Java 17 Spring Boot 2.7.0 Spring Security Spring Data JPA JWT H2 Database Frontend Technologies: React 17.0.1 Axios 0.27.2 Redux 4.0.5 Bootstrap 4.5.2 ReactJS - SpringBoot - JWT - Flow Backend Project Directory: Frontend Project Directory: Following is the screenshot of our application - User Registration: User Signin: Profile View: Access Resource: We will build two projects:  1. Backend:   spring-boot-security-jwt 2. Frontend: react-redux-jwt Project 1: spring-boot-security-jwt 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"
Read more

Spring Boot + Mockito simple application with 100% code coverage

Image
In this article, we will show you a simple  Spring Boot example to demonstrate test methods for Controllers, Service, and Repository, And code coverage analysis using the EclEmma plugin. Technologies used: Spring Boot 2.6.4 Mockito 3.11.2 Maven 3+ EclEmma plugin Junit 5 Java 17 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 unit testing. EclEmma : E
Read more

Top 5 Java ORM tools - 2024

Image
  The term ORM refers to object-relational mapping, which uses objects to adapt programming languages to database systems while allowing them to function with SQL and object-oriented programming ideas. Any kind of database management system that can accomplish object mapping to the table in the virtual system is suitable for the implementation of ORM. Java has a wide variety of ORM tools, some of which are mentioned below: 1. Hibernate Hibernate is a lightweight, open-source, non-invasive Java ORM (Object-Relational Mapping) framework that allows developers to create objects that function independently of database software and create persistence logic in any Java or JavaEE application. It offers an abstraction layer, so developers don't have to bother about implementations; Hibernate handles these tasks internally, such as connecting to databases and creating queries to carry out CRUD operations, among other things. Persistence logic development is done with it. Persistence logic r
Read more

Java - Blowfish Encryption and decryption Example

Image
Blowfish is an encryption method developed by Bruce Schneier in 1993 as an alternative to the DES encryption method. It is significantly faster than DES and provides good encryption speed, although no effective cryptanalysis technique has been found to date. It is one of the first secure block ciphers that is not protected by any patents and is therefore freely available for anyone to use. This is a symmetric block cipher algorithm. Block size: 64 bits Key size: variable size from 32 to 448 bits number of subsections: 18 [P-array] number of rounds: 16 number of substitution blocks: 4 [each with 512 records of 32 bits each] develop  Example 1: Encryption and decryption using Blowfish 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.IllegalBlockSizeExc
Read more

Spring boot video streaming example-HTML5

Image
Hello everyone, Today we will learn how to stream MP4 video using Spring Boot and Spring Web Flux.  The Source code download link is provided at the end of this post. New, Quarkus Practice User Interface   Project Structure: G radle(build.gradle) plugins { id 'org.springframework.boot' version '2.5.4' id 'io.spring.dependency-management' version '1.0.11.RELEASE' id 'java' } group = 'com.knf.demo' version = '0.0.1-SNAPSHOT' sourceCompatibility = '11' repositories { mavenCentral() } dependencies { implementation 'org.springframework.boot:spring-boot-starter-webflux' testImplementation 'org.springframework.boot:spring-boot-starter-test' testImplementation 'io.projectreactor:reactor-test' } test { useJUnitPlatform() } Service (VideoStreamingService.java) package  com.knf.demo.service ; import org.springframework.beans.factory.annotation. Autowired ; import org.springframew
Read more

Google Cloud Storage + Spring Boot - File Upload, Download, and Delete

Image
In this section, we will learn  how to  create a simple spring boot application to perform different file operations such as upload, download, list, and delete files from the Google Cloud Storage. 1.  A little bit of Background Google Cloud Storage Cloud Storage is a managed service for storing unstructured data. Store any amount of data and retrieve it as often as you like. More Info - click here! Spring Boot Spring Boot makes it easy to create stand-alone, production-grade Spring-based Applications that you can "just run".  More Info - click here! 2. Create a GCP Project First, Sign into the Google console at  https://console.cloud.google.com . You can create a new project by first selecting the project dropdown in the top left and selecting " New Project ". Next, specify your GCP  Project name  and  Project ID . Then  Click on the " CREATE " button. Copy " Project ID " and keep it for future purposes. 3. Create a Google Cloud Storage bucket Fr
Read more