JAVA获取远程文件

//path,如:http://xxxx/a.flv

public boolean getExistsUrl(String path){    try {        URL url = new URL(path);        HttpURLConnection httpURLConnection = null;        httpURLConnection = (HttpURLConnection) url.openConnection();        Long size=Long.parseLong(httpURLConnection.getHeaderField("Content-Length"));        if (size>3000){            System.out.println("存在");            return true;        }

       //其它不细写了，
//httpURLConnection从这个对象中可以获取很多东西了
    } catch (Exception e) {        e.printStackTrace();    }    return false;}