java如何下载视频到本地

1.加载servlet容器

不能使用main方法直接调用

  public static boolean httpDownload(String httpUrl, String saveFile) {

        // 1.下载网络文件

        int byteRead;

        URL url;

        try {

            url = new URL(httpUrl);

        } catch (MalformedURLException e1) {

            e1.printStackTrace();

            return false;

        }

 

        try {

            //2.获取链接

            URLConnection conn = url.openConnection();

            //3.输入流

            InputStream inStream = conn.getInputStream();

            //3.写入文件

            FileOutputStream fs = new FileOutputStream(saveFile);

 

            byte[] buffer = new byte[1024];

            while ((byteRead = inStream.read(buffer)) != -1) {

                fs.write(buffer, 0, byteRead);

            }

            inStream.close();

            fs.close();

            return true;

        } catch (FileNotFoundException e) {

            e.printStackTrace();

            return false;

        } catch (IOException e) {

            e.printStackTrace();

            return false;

        }

    }

 

 

    @Test

    public void httpDownload() {

        httpDownload("http://video.zhihuishu.com/zhs/ablecommons/demo/201806/dddee1c446314b84a26c74a8def3c3c7.mp4","E:\\test/22.mp4");

    }

2.添加common-io依赖

import org.apache.commons.io.FileUtils;

 

import java.io.File;

import java.net.URL;

 

public class TestDownloadFile {

 

    public static void main(String[] args) throws Exception{

        String urlStr = "https://img2018.cnblogs.com/i-beta/1278703/201911/1278703-20191128121650595-812419505.png";

        URL url = new URL(urlStr);

        String tempFileName = "E://a.png";

        File temp = new File(tempFileName);

        FileUtils.copyURLToFile(url, temp);

    }

}