Java 雅虎天气API没有回应

我正试图编写一个java客户端，从yahoo weather API获取天气信息

我每次都会遇到这样的异常： 服务器为URL返回了HTTP响应代码：401：

守则：

public class Main {

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
        //  log.info( "Retrieving Weather Data" );
        String zipcode="USCA1116";
            String url = "http://weather.yahooapis.com/forecastrss?p=USCA1116";
            URLConnection connection = new URL(url).openConnection();

            BufferedReader in = new BufferedReader(
                    new InputStreamReader(
                    connection.getInputStream()));
String decodedString;
while ((decodedString = in.readLine()) != null) {
System.out.println(decodedString);
}
in.close();

    }

}

有什么想法吗

只要更换

    String url = "http://weather.yahooapis.com/forecastrss?p=USCA1116";

与

---

截至3月15日的积分请求需要更新为Oauth 1.0。看见

    String url = "http://xml.weather.yahoo.com/forecastrss?p=USCA1116";