SpringBoot – Upload/Download MultipartFile to MySQL – Bootstrap 4 + JQuery Ajax + Spring Hibernate JPA @Lob Example

springboot-upload-download-multipartfile-to-mysql-bootstrap-4-jquery-ajax-spring-hibernate-jpa-lob

In the tutorial, we will show you how to create a SpringBoot project to download/upload MultipartFile to MySQL using Bootstrap 4, JQuery Ajax, Spring Hibernate JPA @Lob

Related posts:
SpringJPA – save/retrieve Files/Images to MySQL database with @Lob annotation

Technologies

  • Java 8
  • Maven 3.6.1
  • Spring Tool Suite: Version 3.9.4.RELEASE
  • Spring Boot: 2.0.2.RELEASE
  • JQuery Ajax
  • Bootstrap 4
  • MySQL

Demo

Goal

We create a SpringBoot project as below:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-project structure

-> Upload/Download Form:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-dowload-files

-> PostgreSQL’s records:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-records

Practice

We create a SpringBoot project with below dependencies:

  • spring-boot-starter-thymeleaf
  • spring-boot-starter-web
  • spring-boot-starter-data-jpa
  • mysql

-> Details:

FrontEnd
Upload Multipart-Form

Ajax Post/Get MultipartFile

– JQuery Ajax to Post MultipartFile is implemented in ‘\src\main\resources\static\js\postrequest.js’ file:

– JQuery Ajax to Retrieve/Download MultipartFile is implemented in ‘\src\main\resources\static\js\getrequest.js’ file:

BackEnd
Data Model

– Create a View with @JsonView in ‘View.java’ file:

– Create ‘FileModel.java’ file:

JPA Repository

Implement JPA repository in ‘FileRepository.java’ file:

– Configure @EnableTransactionManagement in main class ‘SpringBootUploadMultipartFile2MySqlApplication.java’:

Index Controller

Create ‘IndexController.java’ file to serve ‘uploadfile.html’ form:

Upload/Download RestAPIs

– Implement upload-file RestAPI in ‘UploadFileController.java’ file:

– Implement download/retrieve files RestAPIs in ‘DownloadFileController.java’ file:

MySQL Connection

– Add setting in ‘application.properties’ file:

Run & Check Results

Run the SpringBoot project, then makes upload/download requests ->

Upload Files

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-upload-a-file

-> Browser Networks logs:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-upload-file-network-logs

-> MySQL records:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-records

Retrieve Files

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-retrieve-all-files

-> Browser Network logs:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-retrieves-all-files-network-logs

Download Files

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-dowload-files

-> Browser Network logs:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-download-files-network-logs

SourceCode

SpringBootUploadMultipartFile2MySQL

By grokonez | May 31, 2018.

Last updated on September 15, 2018.



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1 thought on “SpringBoot – Upload/Download MultipartFile to MySQL – Bootstrap 4 + JQuery Ajax + Spring Hibernate JPA @Lob Example”

  1. but can you help me I tried to relate like this for but it does not work method MultipartFile Upload:

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