multipart类型,multipart to singlepart

package org.springframework.web.multipart;import java.io.File;import java.io.IOException;import java.io.InputStream;public interface MultipartFile { String getName(); String getOriginalFilename(); String getContentType(); boolean isEmpty(); long getSize(); byte[] getBytes() throws IOException; InputStream getInputStream() throws IOException; void transferTo(File var1) throws IOException, IllegalStateException;}