Shulou(Shulou.com)06/01 Report--

Editor to share with you how to customize the tool class in the Springboot project to achieve the operation of uploading pictures in the background, I believe that most people do not know much about it, so share this article for your reference. I hope you will gain a lot after reading this article. Let's learn about it together.

1. Configure the startup class first

Inherit WebMvcConfigurer

Rewriting method

@ SpringBootApplication//@MapperScan ("com.example.demo.Mapper") public class DemoApplication implements WebMvcConfigurer {public static void main (String [] args) {SpringApplication.run (DemoApplication.class, args) } @ Override public void addResourceHandlers (ResourceHandlerRegistry registry) {/ * addResoureHandler: refers to the exposed access path addResourceLocations: refers to the directory where the internal files are placed * / registry.addResourceHandler ("/ imctemp-rainy/**"). AddResourceLocations ("file:D:/image");}} 2. Add a UploadUtil file upload utility class public class UploadUtil {/ / source file name private String originalFilename; / / source file suffix private String suffix; / / tomcat virtual path private String dbPath; / / file size private long size; / / actual storage path private String realPath stored in the database / * * File upload tool class * @ param attach * @ param request * @ param uploader File uploader * @ return * / public boolean doUpload (MultipartFile attach, HttpServletRequest request, String uploader) {if (! attach.isEmpty ()) {originalFilename = attach.getOriginalFilename (); System.out.println ("= > uploaded file name:" + originalFilename) Suffix = originalFilename.substring (originalFilename.lastIndexOf ("."); System.out.println ("= = > uploaded file suffix:" + suffix); size = attach.getSize (); System.out.println ("= = > size of uploaded file:" + size); String currentFilename = System.currentTimeMillis () + UUID.randomUUID (). ToString () + suffix System.out.println ("= = > uploaded file name:" + currentFilename); realPath = "D:/image/" + uploader; System.out.println ("= = > the real path where the uploaded file is saved:" + realPath); File targetFile = new File (realPath, currentFilename); if (! targetFile.exists ()) {targetFile.mkdirs () } try {attach.transferTo (targetFile);} catch (Exception e) {e.printStackTrace (); return false;} realPath = realPath + "/" + currentFilename / / dbPath = request.getContextPath () + "/" + uploader + "/" + new SimpleDateFormat ("yyyy-MM-dd") .format (new Date ()) + "/" + currentFilename; dbPath = "/" + uploader + "/" + currentFilename; return true;} else {return false;}} public String getUploadFile () {return dbPath;}}

Among them, all the paths need to be changed to their own paths for storing pictures.

3.Controller layer @ RestControllerpublic class UserPhotoController {@ RequestMapping (value = "/ upload", method = RequestMethod.POST) @ ResponseBody public String testUpload (@ RequestParam ("file") MultipartFile file, HttpServletRequest request) {UploadUtil uploadUtil = new UploadUtil (); String fileName = ""; if (uploadUtil.doUpload (file, request, "uploadImg")) {fileName = uploadUtil.getUploadFile ();} else {fileName = "file" } return fileName;}}

Done.

The above is all the contents of this article entitled "how to customize the tool class in the Springboot project to upload pictures in the background". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.