Take out system file upload

04 Upload files

/** *  File upload and download  */
@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {
    

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public String upload(MultipartFile file){
    
        log.info(file.toString());

        // Original filename 
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));

        // Use uuid Regenerate file name 
        String fileName = UUID.randomUUID().toString() + suffix;
        
        // Create directory objects 
        File dir = new File(basePath);
        // Determine whether the directory exists 
        if(!dir.exists()){
    
            // directory does not exist , Need to create 
            dir.mkdirs();
        }
        try{
    
            // Transfer the temporary file to the specified location 
            file.transferTo(new File(basePath+"hello.jpg"));
        }catch (IOException ex){
    
            ex.printStackTrace();
        }
        return fileName;
    }

    /** *  File download  */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
    
        try{
    
            // Input stream 
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));

            // Output stream 
            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");
            
            int len=0;
            byte[] bytes=new byte[1024];
            
            while ((len=fileInputStream.read(bytes))!=-1){
    
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
            // close resource 
            outputStream.close();
            fileInputStream.close();
            
        }catch (Exception e){
    
            e.printStackTrace();
        }
        
    }
}