Springboot文件上传

yaml中的配置

file-save-path: D:/uploadFile/

将上传文件转成url链接形式,接口代码

@Value("${file-save-path}")
private String fileSavePath;

SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd/");

ArrayList<String> mylist=new ArrayList();
@PostMapping("/uploads")
public ArrayList uploads(@RequestParam(value = "file",required = false) MultipartFile[] uploadFiles, HttpServletRequest req) {
    String filePath = "";
    for(MultipartFile uploadFile:uploadFiles){
        String format = sdf.format(new Date());
        File folder = new File(fileSavePath + format);
        if (!folder.isDirectory()) {
            folder.mkdirs();
        }
        String oldName = uploadFile.getOriginalFilename();
        String newName = UUID.randomUUID().toString() +
                oldName.substring(oldName.lastIndexOf("."), oldName.length());
        try {
            uploadFile.transferTo(new File(folder, newName));
            filePath = req.getScheme() + "://" + req.getServerName() + ":" +
                    req.getServerPort() + "/uploadFile/" + format + newName;
        } catch (IOException e) {
            e.printStackTrace();
        }
        mylist.add(filePath);
    }
    return mylist;
}

配置静态资源映射

@Configuration
public class WebConfig implements WebMvcConfigurer {
    /**
     * 图片保存路径，自动从yml文件中获取数据
     *   示例： E:/images/
     */
    @Value("${file-save-path}")
    private String fileSavePath;

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        /**
         * 配置资源映射
         * 意思是：如果访问的资源路径是以“/images/”开头的，
         * 就给我映射到本机的“E:/images/”这个文件夹内，去找你要的资源
         * 注意：E:/images/ 后面的 “/”一定要带上
         */
        registry.addResourceHandler("/uploadFile/**")
                .addResourceLocations("file:"+fileSavePath);
    }
}