关于HttpURLConnection/HttpsURLConnection请求出现了io.filenotfoundexception:url的解决方法

//从输入流读取返回内容
InputStream is = null;
int status = connection.getResponseCode();
if(status>= HttpStatus.SC_BAD_REQUEST){  //此处一定要根据返回的状态码state来初始化输入流。如果为错误
    is = connection.getErrorStream();
}else{
　　//如果正确
    is = connection.getInputStream();
}