向Google发送身份验证请求(Send an authentication request to Google)

我想向Google发送身份验证请求。但我收到错误： 线程“main”中的异常java.io.IOException：服务器返回HTTP响应代码：400为URL。

有人可以帮助我并说出错误所在吗？

我的代码如下：

public class Main { public static void main( String... args ) throws Exception { String httpsURL ="\n" + " client_id=xxx.apps.googleusercontent.com&\n" + " response_type=code&\n" + // "code" is an Basic Value " scope=openid%20email&\n" + " redirect_uri=http://localhost&\n" + " state=security_token%3D138r5719ru3e1%26url%3Dhttps://oauth2-login-demo.example.com/myHome&\n" + " login_hint=peterpan@googlemail.com\n"; String inputLine; String httpsencode ="https://accounts.google.com/o/oauth2/v2/auth?" + URLEncoder.encode(httpsURL, "UTF-8"); URL u = new URL(httpsencode); HttpsURLConnection con = (HttpsURLConnection)u.openConnection(); InputStream ins = con.getInputStream(); InputStreamReader isr = new InputStreamReader(ins); BufferedReader in = new BufferedReader(isr); while ((inputLine = in.readLine()) != null) { System.out.println(inputLine); } in.close(); } }

I would like a Send an authentication request to Google. But I get the error: Exception in thread "main" java.io.IOException: Server returned HTTP response code: 400 for URL.

Can someone help me and say where the error lies?

My code looks as follows:

public class Main { public static void main( String... args ) throws Exception { String httpsURL ="\n" + " client_id=xxx.apps.googleusercontent.com&\n" + " response_type=code&\n" + // "code" is an Basic Value " scope=openid%20email&\n" + " redirect_uri=http://localhost&\n" + " state=security_token%3D138r5719ru3e1%26url%3Dhttps://oauth2-login-demo.example.com/myHome&\n" + " login_hint=peterpan@googlemail.com\n"; String inputLine; String httpsencode ="https://accounts.google.com/o/oauth2/v2/auth?" + URLEncoder.encode(httpsURL, "UTF-8"); URL u = new URL(httpsencode); HttpsURLConnection con = (HttpsURLConnection)u.openConnection(); InputStream ins = con.getInputStream(); InputStreamReader isr = new InputStreamReader(ins); BufferedReader in = new BufferedReader(isr); while ((inputLine = in.readLine()) != null) { System.out.println(inputLine); } in.close(); } }