package com.dji.sample.patches.utils;

import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.UUID;

public class MultipartFileTOFileUtil {

    public File multipartFile2File(MultipartFile multipartFile) {
        String tmpFileDir = null;
        // 创建临时文件
        String randomFileName = UUID.randomUUID().toString();
        tmpFileDir = "D:/tmp/" + randomFileName;
        File file = new File(tmpFileDir);
        InputStream inputStream = null;
        FileOutputStream outputStream = null;
        try {
            // 获取文件输入流
            inputStream = multipartFile.getInputStream();

            if (!file.exists()) {
                file.createNewFile();
            }
            // 创建输出流
            outputStream = new FileOutputStream(file);
            byte[] bytes = new byte[1024];
            int len;
            // 写入到创建的临时文件
            while ((len = ((InputStream) inputStream).read(bytes)) > 0) {
                outputStream.write(bytes, 0, len);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        ZipUtil.deleteFiles(tmpFileDir);
        return file;
    }
}