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

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

Related posts:
Spring Hibernate JPA – Upload/Download File/Image to PostgreSQL with @Lob

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

Goal

We create a SpringBoot project as below:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-project-structure

-> Upload/Download Form:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-download-files

-> PostgreSQL’s records:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-records

Practice

We create a SpringBoot project with below dependencies:

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

-> 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 file:

– Configure @EnableTransactionManagement in main class SpringBootUploadMultipartFile2PostgreSqlApplication:

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 RestAPI
s in DownloadFileController.java file:

PostgreSQL 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-using-JQuery-Ajax-Bootstrap4-upload-file-successfully

-> Browser Network logs:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-upload-file

-> PostgreSQL records:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-records

Retrieve Files

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-get-all-files-views

-> Browser Network logs:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-get-all-files

Download Files

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-download-files

-> Browser Network logs:

SpringJPA-Upload-Download-MultipartFile-to-PostgreSQL-using-JQuery-Ajax-Bootstrap4-download-files-network-logs

SourceCode

SpringBootUploadMultipartFile2PostgreSQL

By JavaSampleApproach | May 30, 2018.

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