Quand le témoin situé dans HttpURLConnection avec Java?

regardez ces code:

public static String get(String url, Properties parameters) throws MalformedURLException, IOException{
url = buldGetUrl(url, parameters);
if(DEBUG) System.out.println("[HTTP GET REQUEST]");
if(DEBUG) System.out.println(" URL: " + url);
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
conn.setRequestProperty("Cookie","JSESSIONID=" + J_SESSION_ID);
conn.connect();
if(DEBUG) System.out.println("\n[HTTP GET RESPONSE]");
if(DEBUG) System.out.println("==== Response Headers =====");
String serverCookies = conn.getHeaderField("Set-Cookie");
if(serverCookies != null){
String[] cookies = serverCookies.split(";");
for(String s : cookies){
s = s.trim();
if(s.split("=")[0].equals("JSESSIONID")){
J_SESSION_ID = s.split("=")[1];
if(DEBUG) System.out.println(" Session ID Found: " + J_SESSION_ID);
break;
}
}
}
if(DEBUG){
for(String s : conn.getHeaderFields().keySet()){
if(s == null)
System.out.println(" " + conn.getHeaderField(s));
else
System.out.println(" " + s + "=" + conn.getHeaderField(s));
}
}
if(DEBUG) System.out.println("==== Response Content =====");
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String str = null;
StringBuilder sb = new StringBuilder();
while ((str = br.readLine()) != null) {
sb.append(str + System.getProperty("line.separator"));
if(DEBUG) System.out.println(str);
}
br.close();
return sb.toString();
}

veuillez noter que ces trois lignes:

HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();    
conn.setRequestProperty("Cookie","JSESSIONID=" + J_SESSION_ID);
conn.connect();

URL#openConnection et URL#connect, la méthode à envoyer la requête au serveur?
si la réponse est openConnection méthode, comment un témoin peut être réglé après une demande déjà été envoyé? si la réponse est connecter méthode, vous devinez quoi ? ces code ci-dessous fonctionne trop, je peux obtenir la réponse du serveur :

url = buldGetUrl(url, parameters);
if(DEBUG) System.out.println("[HTTP GET REQUEST]");
if(DEBUG) System.out.println(" URL: " + url);
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
if(DEBUG) System.out.println("\n[HTTP GET RESPONSE]");
if(DEBUG) System.out.println("==== Response Headers =====");
String serverCookies = conn.getHeaderField("Set-Cookie");
if(serverCookies != null){
String[] cookies = serverCookies.split(";");
for(String s : cookies){
s = s.trim();
if(s.split("=")[0].equals("JSESSIONID")){
J_SESSION_ID = s.split("=")[1];
if(DEBUG) System.out.println(" Session ID Found: " + J_SESSION_ID);
break;
}
}
}
if(DEBUG){
for(String s : conn.getHeaderFields().keySet()){
if(s == null)
System.out.println(" " + conn.getHeaderField(s));
else
System.out.println(" " + s + "=" + conn.getHeaderField(s));
}
}
if(DEBUG) System.out.println("==== Response Content =====");
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String str = null;
StringBuilder sb = new StringBuilder();
while ((str = br.readLine()) != null) {
sb.append(str + System.getProperty("line.separator"));
if(DEBUG) System.out.println(str);
}
br.close();
return sb.toString();

OriginalL'auteur CaiNiaoCoder | 2011-11-23