關於HttpURLConnection/HttpsURLConnection請求出現了io.filenotfoundexception:url的解決方法

//從輸入流讀取返回內容
InputStream is = null;
int status = connection.getResponseCode();
if(status>= HttpStatus.SC_BAD_REQUEST){  //此處一定要根據返回的狀態碼state來初始化輸入流。如果為錯誤
    is = connection.getErrorStream();
}else{
　　//如果正確
    is = connection.getInputStream();
}