Delete Record from a table in React JS, Spring Boot and MYSQL

How to delete a record from a table in React JS with Spring Boot Application. In this article, we will learn How to create a delete functionality using React JS and Spring Boot application.

Tools and Technologies Used in Spring boot and ReactJs app

React JS
Spring Boot
MYSQL Database
Spring Data JPA

Delete Record from a table in React JS, Spring Boot, and MYSQL

We will develop a simple application where we will implement delete functionality in React JS application using Spring Boot at the backend, and using Spring Data JPA at the Data Access Layer.

Let us divide the development process into two parts:

Frontend: React JS
Backend: Spring Boot

Note:

If you want to know How to display only the list on the web page using React JS and Spring Boot application check this article https://codebun.com/how-to-create-spring-boot-and-reactjs-application/.
If you want to know How to create pagination in React JS with Spring boot application check this article Dynamic Pagination.

Create Backend Part using Spring boot, Spring Data JPA and MYSQL

Create a Database

The first step is to create a database name ‘db_demo’ using the MYSQL command line or Workbench.

Create database db_demo

Create Project

Create a project using Spring Initializr. If you don’t know how to create a project using the same check this article https://codedec.com/tutorials/how-to-create-spring-boot-project-using-spring-initializr/

Import a Project

Now, it’s time to import the project into STS. Go to File > Import > Maven > Existing Maven Project > Next > Browse > Select the project > Finish. Now, it will take time to import the project, and similarly, all the dependencies would be added.

Configure application. properties file

# change the port
server.port=8888
#Database Configrations
spring.datasource.url=jdbc:mysql://localhost:3306/db_demo
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
spring.jpa.database-platform = org.hibernate.dialect.MySQL8Dialect
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto = update

Create a Model Class

Now, we will create a Model class called Book.java. I have used the Lombok library to remove boilerplate code. In case you want to know what is Lombok check this article Lombok Tutorial.

Book.java

package com.abc.in.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.springframework.context.annotation.EnableAspectJAutoProxy;

import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

@Setter
@Getter
@AllArgsConstructor
@NoArgsConstructor
@Entity
@Table(name = "book")
public class Book {

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 private long id;
 
 private String bookName;
 
 private String authorName;
 
 private long price;
}

Create Repository Interface

Now, we will create a Data Access Layer called BookRepository which will extend JPARepository.

package com.abc.in.repository;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;

import com.abc.in.model.Book;

public interface BookRepository extends JpaRepository<Book, Long>{

 
}

Create a Controller

The client request is sent to the controller which acts as an API layer that will have the endpoints for REST API.

package com.abc.in.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import com.abc.in.model.Book;
import com.abc.in.repository.BookRepository;
@CrossOrigin(origins = "http://localhost:3000/")
@RestController
public class BookController {

 @Autowired
 private BookRepository bookRepository;
 @GetMapping("/books")
 public Page<Book> getAllBooks(Pageable pageable) {
  return bookRepository.findAll(pageable);
 }
 
        //For Deleteing a record
 @DeleteMapping("/books/{id}")
 public ResponseEntity<Book> deleteBook(@PathVariable("id") long id){
  try {
   System.out.println("inside");
  bookRepository.deleteById(id);
  return new ResponseEntity<Book>(HttpStatus.OK);
  }
  catch (Exception e) {
   // TODO: handle exception
   return new ResponseEntity<Book>(HttpStatus.INTERNAL_SERVER_ERROR);
  }
 }
 
 // For searching
 @GetMapping("/books/{keyword}")
 public Page<Book> getAllBooks(Pageable pageable,@PathVariable("keyword") String keyword) {
  return bookRepository.findAll(pageable,keyword);
 }
 
 
}

Mark the BookController with @RestController.
Now, create a deleteBook() method that would call deleteById() method of repository class.

Meanwhile, add some of the data into the database or you can use the main class also to insert data as shown below.

package com.abc.in;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.abc.in.model.Book;
import com.abc.in.repository.BookRepository;

@SpringBootApplication
public class SpringBootBackendPartApplication implements CommandLineRunner {

 public static void main(String[] args) {
  SpringApplication.run(SpringBootBackendPartApplication.class, args);
 }

 @Autowired
 private BookRepository bookRepository;

 @Override
 public void run(String... args) throws Exception {
  Book book = new Book();

  for (int i = 0; i < 30; i++) {
   bookRepository.save(new Book(1, "Wings of Fire", "A P J Abdul Kalam, Arun Tiwari", 500 + i));
   bookRepository.save(new Book(2, "The Alchemist", "Paulo Coelho", 144 + i));
   bookRepository.save(new Book(3, "War and Peace", "Leo Tolstoy", 299 + i));
   bookRepository.save(new Book(3, "Song of Solomon", "Tony Morrison", 555 + i));
  }

 }

}

Run the Application

Run the above class and see the data would now be persisted into the table. Go to the browser and hit the URL http://localhost:8888/books/125 and you will see the response in JSON format.

Create Frontend Part using ReactJS

Now, we will create a frontend part of the application using React JS. Open Cmd prompt > Go to the folder where you want to create a project with the help of command prompt codes > enter the command npx create-react-app book-frontend.

Now, open Visual Studio Code IDE and open the book-frontend app.
Here, you will see all the required folders and files.

We will be using bootstrap in React JS. So, open the terminal of VS code and type the following command

D:\Job Stuff\My_Study\React JS\book-frontend>npm install bootstrap

You have to install React Bootstrap also by using the following command

D:\Job Stuff\My_Study\React JS\book-frontend> npm install react-bootstrap

Install Axios library that is going to make a request to the endpoints which we have created at the backend.

D:\Job Stuff\My_Study\React JS\book-frontend> npm install axios

Create BookComponent.js

Inside the src folder, create a components folder and add a BookComponent.js and add the following lines of code.

import axios from 'axios';
import React from 'react'
import { Button, Row } from 'react-bootstrap';
import { Link } from 'react-router-dom';
import bookService from '../services/BookService'



class BookComponent extends React.Component {

    constructor(props) {
        super(props)
        this.state = {
            books: [],
            currentPage: 1,
            recordPerPage: 7,
            search: '',
            id: '',
        }
    }

    componentDidMount() {
        this.getBooksByPagination(this.state.currentPage);
    }
    getBooksByPagination(currentPage) {
        currentPage = currentPage - 1;
        axios.get("http://localhost:8888/books?page=" + currentPage + "&size=" + this.state.recordPerPage)
            .then(response => response.data).then((data) => {
                this.setState({
                    books: data.content,
                    totalPages: data.totalPages,
                    totalElements: data.totalElements,
                    currentPage: data.number + 1
                });
            });
    }

    //Writing All the pagination functions
    //Show Next page
    showNextPage = () => {
        if (this.state.currentPage < Math.ceil(this.state.totalElements / this.state.recordPerPage)) {
            if (!this.state.search) {
                this.getBooksByPagination(this.state.currentPage + 1);
            } else {
                this.searchBook(this.state.currentPage + 1)
            }
        }
    };

    //Show Last Page
    showLastPage = () => {
        if (this.state.currentPage < Math.ceil(this.state.totalElements / this.state.recordPerPage)) {
            if (!this.state.search) {
                this.getBooksByPagination(Math.ceil(this.state.totalElements / this.state.recordPerPage));
            }
            else {
                this.searchBook(Math.ceil(this.state.totalElements / this.state.recordPerPage));
            }
        }
    };
    //Show First page
    showFirstPage = () => {
        let firstPage = 1;
        if (this.state.currentPage > firstPage) {
            if (!this.state.search) {
                this.getBooksByPagination(firstPage);
            } else {
                this.searchBook(firstPage)
            }
        }
    };

    //Show previous page
    showPrevPage = () => {
        let prevPage = 1
        if (this.state.currentPage > prevPage) {
            if (!this.state.search) {
                this.getBooksByPagination(this.state.currentPage - prevPage);
            } else {
                this.searchBook(this.state.currentPage - prevPage);
            }
        }
    };
    //Search Box Method
    searchBox = (e) => {
        this.setState({
            //assigning value to event target
            [e.target.name]: e.target.value,
        });
    };
    //Search Method Logic
    searchBook = (currentPage) => {
        currentPage = currentPage - 1;
        axios.get("http://localhost:8888/books/" + this.state.search + "?page=" + currentPage + "&size=" + this.state.recordPerPage)
            .then(response => response.data).then((data) => {
                this.setState({
                    books: data.content,
                    totalPages: data.totalPages,
                    totalElements: data.totalElements,
                    currentPage: data.number + 1
                });
            });
    };

    //Reset Search Box
    resetBook = (currentPage) => {
        this.setState({ "search": '' });
        this.getBooksByPagination(this.state.currentPage);
    };
    //Delete Book on the web page
    deleteBook = (id) => {
        axios.delete("http://localhost:8888/books/" + id).then(
            (response) => {
                alert("Record Deleted Successfully");
                this.setState({
                    books: this.state.books.filter(book => book.id !== id)
                });
            }, (error) => {
                alert("Operation Failed Here");
            }
        );
    };
    render() {
        const { books, currentPage, totalPages, recordPerPage, search } = this.state;
        return (
            <div>

                <h1 className="text-center mt-5 ">List of Books</h1>
                <div className="container mt-2">
                    <div style={{ float: 'center' }} align="center">
                        <div class="form-group mb-2">
                            <input type="text" class="form-control" name="search" size="50" placeholder="Search Here" value={search} onChange={this.searchBox} />
                            <button type="button" name="search" class="btn btn-info my-2 text-center mr-2" onClick={this.searchBook}>Search Book</button>
                            <button type="reset" class="btn btn-secondary text-center ml-5" style={{ marginLeft: '10px' }} onClick={this.resetBook}>Clear Book</button>
                        </div>
                    </div>
                    <table className="table table-bordered border-info shadow">
                        <thead>
                            <tr>
                                <th>#</th>
                                <th>Book Name</th>
                                <th>Book Author</th>
                                <th>Price</th>
                                <th>Action</th>
                            </tr>
                        </thead>
                        <tbody>
                            {books.length === 0 ?
                                <tr align="center"><td colSpan="5">No Record Found</td></tr> :
                                books.map(
                                    (books, index) => (
                                        <tr key={books.id}>
                                            <td>{(recordPerPage * (currentPage - 1)) + index + 1}</td>
                                            <td>{books.bookName}</td>
                                            <td>{books.authorName}</td>
                                            <td>{books.price}</td>
                                            <td><button className="btn btn-outline-danger" onClick={() => { this.deleteBook(books.id) }}>Delete</button></td>

                                        </tr>
                                    )
                                )
                            }
                        </tbody>

                    </table>
                    <table className="table">
                        <div style={{ float: 'left', fontFamily: 'monospace', color: '#0275d8' }}>
                            Page {currentPage} of {totalPages}
                        </div>
                        <div style={{ float: 'right' }}>
                            <div class="clearfix"></div>
                            <nav aria-label="Page navigation example">
                                <ul class="pagination">
                                    <li class="page-item"><a type="button" class="page-link" disabled={currentPage === 1 ? true : false} onClick={this.showPrevPage}>Previous</a></li>
                                    <li class="page-item"><a type="button" class="page-link" disabled={currentPage === 1 ? true : false} onClick={this.showFirstPage}>First</a></li>
                                    <li class="page-item"><a type="button" class="page-link" disabled={currentPage === totalPages ? true : false} onClick={this.showNextPage}>Next</a></li>
                                    <li class="page-item"><a type="button" class="page-link" disabled={currentPage === totalPages ? true : false} onClick={this.showLastPage}>Last</a></li>
                                </ul>
                            </nav>
                        </div>
                    </table>
                </div>
            </div>
        )
    }
}
export default BookComponent

Now, let us divide the code and understand the working of it. (Here, in this code, we have also added the Pagination, Searching Functionality If you want to know How it is done check this article https://codebun.com/search-record-from-a-table-in-react-js-spring-boot-and-mysql/)

First, add the delete button and add the method deleteBook(id) method that would be called on the onClick of a button.

<td><button className="btn btn-outline-danger" onClick={() => { this.deleteBook(books.id) }}>Delete</button></td>

Now, define the method deleteBook() as shown below. Inside this method, use the Axios library to make a request to the endpoints and at last show message Record Deleted Successfully” using alert.
In order to refresh the page after the book is deleted set the state with the id which is not equal to deleted book id.

//Delete Book on the web page
    deleteBook = (id) => {
        axios.delete("http://localhost:8889/books/" + id).then(
            (response) => {
                alert("Record Deleted Successfully");
                this.setState({
                    books: this.state.books.filter(book => book.id !== id)
                });
            }, (error) => {
                alert("Operation Failed Here");
            }
        );
    };

Now, add the BookComponent.js into App.js

import logo from './logo.svg';
import './App.css';
import BookComponent from './components/BookComponent';
function App() {
  return (
    <div className="App">
      <BookComponent/>
    </div>
  );
}
export default App;

Run the React JS app by going to the terminal and enter the following command

D:\Job Stuff\My_Study\React JS\book-frontend> npm start

At localhost:3000 you will be able to see the following output. Once you click on delete, it would delete the record ‘5’ and will display the alert message “Record deleted Successfully”.