java 读取url数据

package test0911;

import com.sun.deploy.net.HttpRequest;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

public class DowMp4 {
    /**
     * 从网络Url中下载文件
     * @param urlStr
     * @param fileName
     * @param savePath
     * @throws IOException
     */
    public static void  downLoadFromUrl(String urlStr,String fileName,String savePath,String toekn,FileOutputStream fos) throws IOException {
        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        //设置超时间为3秒
        conn.setConnectTimeout(3*1000);
        //防止屏蔽程序抓取而返回403错误
        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
        conn.setRequestProperty("lfwywxqyh_token",toekn);

        //得到输入流
        InputStream inputStream = conn.getInputStream();
        //获取自己数组
        byte[] getData = readInputStream(inputStream);

        //文件保存位置
        File saveDir = new File(savePath);
        if(!saveDir.exists()){
            saveDir.mkdir();
        }
//        File file = new File(saveDir+File.separator+fileName);
//        FileOutputStream fos = new FileOutputStream(file);
        fos.write(getData);
//        if(fos!=null){
//            fos.close();
//        }
        if(inputStream!=null){
            inputStream.close();
        }


        System.out.println("info:"+url+" download success");

    }



    /**
     * 从输入流中获取字节数组
     * @param inputStream
     * @return
     * @throws IOException
     */
    public static  byte[] readInputStream(InputStream inputStream) throws IOException {
        byte[] buffer = new byte[1024];
        int len = 0;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        while((len = inputStream.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        bos.close();
        return bos.toByteArray();
    }

    public static void main(String[] args) throws IOException {
        File file = new File("D:\\a.mp4");
        FileOutputStream fos = new FileOutputStream(file);
        for(int i=50;i<70;i++){
            String url="https://v5.weizan.cn//474299/132202396797408098/55756337466_"+i+".ts";
            String token="v32Eo2Tw+qWI/eiKW3D8ye7l19mf1NngRLushO6CumLMHIO1aryun0/Y3N3YQCv/TqzaO/TFHw4=";
            DowMp4.downLoadFromUrl(url,"a.mp4","D:\\",token,fos);
        }
        if(fos!=null){
            fos.close();
        }
        System.out.println("下载完成");

    }
}