package com.szxgl.pars2021.utils;

import org.apache.commons.io.IOUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

public class FileUpLoad {

    public static String upload(String parentPath, MultipartFile fileImage){

        //如果没有上传文件就为null
        if (fileImage == null) {
            return null;
        }
        InputStream is = null;
        String fileName = null;
        String newPath = null;
        FileOutputStream os = null;
        String name = null;

        try {
            //获取输入流
            is = fileImage.getInputStream();

            //获取文件名
            fileName = fileImage.getOriginalFilename();
            //文件名处理，加上一串随机数
            fileName = UUID.randomUUID().toString().replaceAll("-","") + fileName;

            //判断文件夹是否创建
            File file = new File(parentPath);
            if(!file.exists()){
                file.mkdirs();
            }

            //根据时间创建文件夹名称
            newPath = new SimpleDateFormat("yyyyMMdd").format(new Date());
            newPath = parentPath + "/" +  newPath;
            File file2 = new File(newPath);
            if(!file2.exists()){
                file2.mkdirs();
            }

            //获取输出流
            os = new FileOutputStream(new File(newPath, fileName));
            //进行复制
            IOUtils.copy(is,os);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                if (os != null) {
                    os.close();
                }
                if (is != null) {
                    is.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        name = "/" + newPath.substring(newPath.lastIndexOf("\\")+1) + "/" + fileName;

        return  name;
    }

    public static void main(String[] args) {
        String url = "D:\\file/2021111022379fe88b5f44f797271c0dc39d3019WeChat_20211110092809.mp4";
        url = url.substring(url.lastIndexOf("\\")+1);
        System.out.println(url);

    }
}