package com.gk.firework.Domain.Utils;

import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

public class UploadUtil {

    public static String uploadFile(MultipartFile file,String filePath) throws Exception {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        String oldName = file.getOriginalFilename();
        if (StringUtils.isBlank(oldName)) {
            return "null";
        }
        String newName = sdf.format(new Date()) + oldName.substring(oldName.lastIndexOf("."));
        File dest = new File(filePath, newName);
        String url = newName;
        if (!dest.getParentFile().exists()) {
            boolean rel = dest.getParentFile().mkdirs();
            if (!rel) {
                throw new Exception("文件夹创建失败");
            }
        }
        InputStream is = file.getInputStream();
        OutputStream os = new FileOutputStream(dest);
        try {
            byte[] buffer = new byte[8 * 1024];
            int bytesRead;
            while ((bytesRead = is.read(buffer)) != -1) {
                os.write(buffer, 0, bytesRead);
            }
        } catch (Exception e) {
            throw e;
        } finally {
            if (is != null) {
                is.close();
            }
            if (os != null) {
                os.close();
            }
        }

        return url;
    }
}