java - UnknownHostException Android utf-8 编码 URL

Question

String url = String.format("http://%s.jpg.to", URLEncoder.encode("свинья", "utf-8"));
new URL(url).openStream();
Document doc = Jsoup.connect(url).get();

我想读取 URL 中包含俄语符号的网页，但捕获异常 (Android 4.1.1):

W/System.err: java.net.UnknownHostException: http://%D1%81%D0%B2%D0%B8%D0%BD%D1%8C%D1%8F.jpg.to
W/System.err:     at libcore.net.http.HttpConnection$Address.<init>(HttpConnection.java:283)
W/System.err:     at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
W/System.err:     at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
W/System.err:     at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
W/System.err:     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
W/System.err:     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
W/System.err:     at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
W/System.err:     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:563)
W/System.err:     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:540)
W/System.err:     at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:227)
W/System.err:     at org.jsoup.helper.HttpConnection.get(HttpConnection.java:216)
W/System.err:     at test.jpgto.MainActivity$RetrieveImageTask.doInBackground(MainActivity.java:63)
W/System.err:     at test.jpgto.MainActivity$RetrieveImageTask.doInBackground(MainActivity.java:49)
W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:287)
W/System.err:     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
W/System.err:     at java.lang.Thread.run(Thread.java:856)

但是链接http://2.jpg.to/ (例如)工作正常。我做错了什么？

Answer 1

            String url = String.format("http://%s.jpg.to", IDN.toASCII("свинья"));

我们看到链接http://xn--b1ampn2ds.jpg.to