Spring boot implementation file upload instance (multi file upload)

File upload is mainly divided into the following steps:

(1) Create a new Maven java project;

(2) Add corresponding dependencies in pom.xml;

(3) Create a new form page (thymleaf is used here);

(4) Write controller;

(5) Testing;

(6) Make some restrictions on uploaded files;

(7) Implementation of multi file upload

(1) Create a new Maven java project

Create a new Java project named spring boot fileUpload Maven;

(2) Add corresponding dependencies in pom.xml;

Add the corresponding Maven dependency. See the following explanation for details:

(3) Create a new form page (thymleaf is used here)

Create new templates in Src / main / resources and a new file under templates html:

(4) Write controller;

Write the controller to test. Here we mainly implement two methods: one is to provide the / file path for access; The second is to provide the / upload method of post upload. See the code implementation for details:

(5) Write application. Java and test it

The application does not have any code, but the boot configuration of spring boot is as follows:

Then you can access: http://127.0.0.1:8080/file After testing, the file upload path is under the following path of the project. Please refresh and check. For others, please check the comments in the code for your own thinking

(6) Make some restrictions on uploaded files;

It is necessary to make some restrictions on files in application Java coding configuration:.

(7) Implementation of multi file upload

Multiple files are relatively simple for the previous page, and the specific code implementation is as follows:

In Src / resources / templates / mutifile html

Two new methods are added in fileuploadcontroller:

Access path: http://127.0.0.1:8080/mutifile Test.

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