2
http接続を確立し、HTMLページの内容を読み取ろうとしています。これは私がページに接続するために使用しているクラスで、Webページに接続できません。
public class Connection {
private URL url;
private HttpURLConnection httpURLConnection;
public Connection(String url) throws MalformedURLException {
this.url = new URL(url);
this.httpURLConnection = new HttpURLConnection(this.url) {
@Override
public void connect() throws IOException {
httpURLConnection.connect();
httpURLConnection.setReadTimeout(15000);
httpURLConnection.setConnectTimeout(15000);
httpURLConnection.setUseCaches(false);
HttpURLConnection.setFollowRedirects(true);
}
@Override
public void disconnect() {
httpURLConnection.disconnect();
}
@Override
public boolean usingProxy() {
return false;
}
};
}
public String parse() throws IOException {
InputStream is = httpURLConnection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while ((line = rd.readLine()) != null)
{
response.append(line);
response.append('\n');
}
rd.close();
return response.toString();
}
}
これは、呼び出し元のコードで、
public static void main(String[] args) {
// write your code here
String url = "https://www.buffalo.edu";
Connection c;
String str = null;
try {
c = new Connection(url);
str = c.parse();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println(str);
}
私は次の例外
null
java.net.UnknownServiceException: protocol doesn't support input
at java.net.URLConnection.getInputStream(URLConnection.java:830)
at io.soumasish.connections.Connection.parse(Connection.java:47)
at io.soumasish.App.main(App.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
私は何をやっているの取得しますここで間違っている。どんな助けもありがたい。