Java File与MultipartFile互转

pom中添加依赖

      <dependency>
          <groupId>commons-fileupload</groupId>
          <artifactId>commons-fileupload</artifactId>
          <version>1.4</version>
      </dependency>

File转MultipartFile

	/**
     * File转MultipartFile
     *
     * @param file
     * @return
     */
    public static MultipartFile createFileItem(File file) {
   
        FileItemFactory factory = new DiskFileItemFactory(16, null);
        FileItem item = factory.createItem("textField", "text/plain", true,