單檔案上傳

配置檔案設定

@Component
public class MultipartConfig {
    @Bean
    public MultipartConfigElement multipartConfigElement(){
        MultipartConfigFactory factory=new MultipartConfigFactory();
        //設定檔案上傳大小
        factory.setMaxFileSize("256KB");
        //設定總上傳檔案總大小
        factory.setMaxRequestSize("512KB");
        //設定檔案上傳路徑
        factory.setLocation("D:/temp/");

        return factory.createMultipartConfig();
    }
}
 

單檔案上傳controller

@RequestMapping(value = "upload", method = RequestMethod.POST)
    @ResponseBody
    public String upload(@RequestParam("file") MultipartFile file , HttpSession session) {
        if (!file.isEmpty()) {
            try {
                FileCopyUtils.copy(file.getBytes(), new File(uploadPath + file.getOriginalFilename()));
            } catch (IOException e) {
                e.printStackTrace();
                return "檔案上傳失敗" + e.getMessage();
            }
            return "上傳成功，檔名為" + file.getOriginalFilename();
        } else {
            return "檔案上傳失敗，檔案是空的";
        }
    }
 

多檔案上傳controller

@RequestMapping(value = "batchUpLoad" ,method = RequestMethod.POST)
    @ResponseBody
    public String batchUpLoad(HttpServletRequest request ){
        List<MultipartFile> file = ((MultipartHttpServletRequest) request).getFiles("file");
        StringBuilder stringBuilder=new StringBuilder();
        for (MultipartFile multipartFile : file) {
            if (!multipartFile.isEmpty()){
                try {
                    FileCopyUtils.copy(multipartFile.getBytes(), new File(uploadPath + multipartFile.getOriginalFilename()));
                    stringBuilder.append(multipartFile.getOriginalFilename()+"上傳成功"+"\n");
                } catch (IOException e) {
                    e.printStackTrace();
                    stringBuilder.append(multipartFile.getOriginalFilename()+"上傳失敗"+e.getMessage()+"\n");
                    return stringBuilder.toString();
                }
            } else {
                System.out.println("檔案為空");
            }
        }
        return stringBuilder.toString();

    }

 

html頁面就是簡單的檔案提交頁面
需要說的是，批量上傳檔案，也可以使用 MultipartFile【】 陣列來接收，不過這樣的話，前臺的資料就需要做一定的處理，讓前臺的資料提交為陣列型別

將檔案寫入響應中 （主要用於前臺需要顯示後臺的動態檔案的情況）

   @RequestMapping(value = "personInfo")
    public void getPersonPicture(HttpServletResponse response) throws IOException {
        response.setHeader("Content-Type", URLConnection.guessContentTypeFromName(personPicturePath.getFilename()));
        IOUtils.copy(personPicturePath.getInputStream(), response.getOutputStream());
    }

github url:springbootfileupload