content: package jnpf.util;
  
  import org.springframework.web.multipart.MultipartFile;
  import org.springframework.web.multipart.MultipartHttpServletRequest;
  import org.springframework.web.multipart.MultipartResolver;
  import org.springframework.web.multipart.support.StandardServletMultipartResolver;
  
  import java.io.File;
  import java.io.IOException;
  import java.text.SimpleDateFormat;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  import java.util.Map;
  
  /**
   *
   * @author JNPF开发平台组
   * @version V3.1.0
   * @copyright 引迈信息技术有限公司
   * @date 2021/3/16 10:57
   */
  public class UpUtil {
  
      /**
       * 获取上传文件
       */
      public static List<MultipartFile> getFileAll(){
          MultipartResolver resolver = new StandardServletMultipartResolver();
          MultipartHttpServletRequest mRequest = resolver.resolveMultipart(ServletUtil.getRequest());
          Map<String, MultipartFile> fileMap = mRequest.getFileMap();
          List<MultipartFile> list = new ArrayList<>();
          for(Map.Entry<String,MultipartFile> map : fileMap.entrySet()){
              list.add(map.getValue());
          }
          return list;
      }
  
      /**
       * 获取文件大小
       */
      public static long getFileSize(MultipartFile multipartFile){
         return multipartFile.getSize();
      }
  
      /**
       * 获取文件类型
       */
      public static String getFileType(MultipartFile multipartFile){
          if (multipartFile.getContentType()!=null) {
              int begin = multipartFile.getOriginalFilename().indexOf(".");
              int last = multipartFile.getOriginalFilename().length();
              String type = multipartFile.getOriginalFilename().substring(begin+1, last);
              return type;
          }
          return null;
      }
  
      /**
       * 上传文件
       */
      public static String upLoad(MultipartFile file) {
          if (file.isEmpty()) {
              throw new RuntimeException("上传文件不能为空");
          }
          String fileName = file.getOriginalFilename();
          Date date=new Date();
          SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
          String time = formatter.format(date);
          String uuidFileName = time+"_"+ RandomUtil.uuId()+"@"+fileName;
          File dest = new File(uuidFileName);
          if(!dest.getParentFile().exists()){
              dest.getParentFile().mkdir();
          }
          try {
              file.transferTo(dest);
              return uuidFileName;
          } catch (IllegalStateException e) {
              e.printStackTrace();
          } catch (IOException e) {
              e.printStackTrace();
          }
          return null;
      }
  
  }
  