从Servlet使用Facebooks Graph-API以及编码问题

特殊字符转码：String param = URLEncoder.encode("Hermann-Löns", "UTF-8");

String url = "http://facebook.com/some/api"; 
String charset = "UTF-8"; 
String param1 = URLEncoder.encode("value1", charset); 
String param2 = URLEncoder.encode("value2", charset); 
String query = String.format("param1=%s&param2=%s", param1, param2); 
 
URLConnection urlConnection = new URL(url).openConnection(); 
urlConnection.setUseCaches(false); 
urlConnection.setDoOutput(true); // Triggers POST. 
urlConnection.setRequestProperty("accept-charset", charset); 
urlConnection.setRequestProperty("content-type", "application/x-www-form-urlencoded"); 
 
OutputStreamWriter writer = null; 
try { 
    writer = new OutputStreamWriter(urlConnection.getOutputStream(), charset); 
    writer.write(query); // Write POST query string (if any needed). 
} finally { 
    if (writer != null) try { writer.close(); } catch (IOException logOrIgnore) {} 
} 
 
InputStream response = urlConnection.getInputStream(); 
// Now do your thing with the facebook response.

 HttpClient API :

String url = "http://facebook.com/some/api"; 
String charset = "UTF-8"; 
List<NameValuePair> params = new ArrayList<NameValuePair>(); 
params.add(new BasicNameValuePair("param1", "value1")); 
params.add(new BasicNameValuePair("param2", "value2")); 
UrlEncodedFormEntity query = new UrlEncodedFormEntity(params, charset); 
 
HttpClient client = new DefaultHttpClient() 
HttpPost post = new HttpPost(url); 
post.setEntity(query); 
InputStream response = client.execute(post).getEntity().getContent(); 
// Now do your thing with the facebook response.