連接被拒絕異常

Question

我收到此異常：

org.apache.http.conn.HttpHostConnectException: Connection to http://www.google.es refused
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:158)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:149)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:121)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:561)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:415)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:820)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:732)
at sdf.main(sdf.java:17)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.TwoStacksPlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:123)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:148)
... 8 more

我正在運行的代碼是這樣的：

public class sdf {

static String url = "http://www.google.es";

public static void main(String[] args) {

    try {
        BufferedReader br = new BufferedReader(new InputStreamReader(
                new DefaultHttpClient().execute(new HttpGet(url))
                        .getEntity().getContent()));
        String line;
        while ((line = br.readLine()) != null) {
            System.out.println(line);
        }

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
}

不管url的值是什么，都行不通。

我究竟做錯了什么？

Answer 1

您是否有經過正確許可的清單？ 這是您必須執行的一個示例：

<manifest xlmns:android...>
 ...
      <uses-permission android:name="android.permission.INTERNET"></uses-permission>
</manifest>

沒有這個，您將無法連接互聯網