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;}