通过url下载文件保存本地或者转存云服务器

package tech.liveeasy.biz.camphor.common.utils;

import org.apache.commons.io.FileUtils;
import tech.liveeasy.biz.camphor.common.oss.OSSUnit;

import java.io.File;
import java.net.URL;

public class RecordOSSUtil {

//调用这个方法即可
    public static String up2OSS(String url) {
        File file = downloadFromUrl(url, "/");
        String oss = OSSUnit.uploadObject2OSS(file, "record/");
        file.delete();
        return oss;
    }

    public static File downloadFromUrl(String url, String dir) {
        try {
            URL httpUrl = new URL(url);
            String fileName = getFileNameFromUrl(url);
            File file = new File(dir + fileName);
            FileUtils.copyURLToFile(httpUrl, file);
            return file;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String getFileNameFromUrl(String url) {
        String name = new Long(System.currentTimeMillis()).toString() + ".X";
        int index = url.lastIndexOf("/");
        if (index > 0) {
            name = url.substring(index + 1);
            if (name.trim().length() > 0) {
                return name;
            }
        }
        return name;
    }
}