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Javaから（HTTP経由で）特定のWebサイトにフォームを送信しようとしていますが、応答を読んだときに、期待したものが表示されません。正確に言うと、まず、ブラウザでWebサイトを開き、フォームに手動で入力して送信します。Chromeでは、ネットワークを介して送信されるデータを確認できます。

Request URL:http://wizzair.com/en-GB/Select
Request Method:POST
Status Code:200 OK
Request Headersview source
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Cache-Control:max-age=0
Connection:keep-alive
Content-Length:1061
Content-Type:application/x-www-form-urlencoded
Cookie:WRUID=0; ASP.NET_SessionId=3e3ahach1d34oyhtoqfshxhe; Culture=en-GB; __utma=17431487.361991764.1292186668.1354138010.1354651562.81; __utmb=17431487.9.9.1354652614319; __utmc=17431487; __utmz=17431487.1319145359.34.18.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=wizz
Host:wizzair.com
Origin:http://wizzair.com
Referer:http://wizzair.com/en-GB/Select
User-Agent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.91 Safari/537.11
Form Dataview URL encoded
__EVENTTARGET:HeaderControlGroupRibbonSelectView_AvailabilitySearchInputRibbonSelectView_ButtonSubmit
__VIEWSTATE:/wEPDwUBMGRkNSMYF94e4mXCiiJGEJbRixyidoa2QXSambTT2mm6cLs=
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$OriginStation:EIN
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$DestinationStation:OTP
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$DepartureDate:02/02/2013
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$ReturnDate:05/02/2013
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$PaxCountADT:1
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$PaxCountCHD:0
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$PaxCountINFANT:0
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$BaggageCount:0
HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$ButtonSubmit:Search

したがって、Javaプログラムからの同じ要求をシミュレートしようとします。

        public void doSubmit(String url, Map<String, String> data) throws Exception {
    URL siteUrl = new URL(url);
    HttpURLConnection conn = (HttpURLConnection) siteUrl.openConnection();
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);
    conn.setDoInput(true);

    conn.setRequestProperty("Cookie", "WRUID=0; ASP.NET_SessionId=3e3ahach1d34oyhtoqfshxhe; Culture=en-GB; __utma=17431487.361991764.1292186668.1354138010.1354651562.81; __utmb=17431487.9.9.1354652614319; __utmc=17431487; __utmz=17431487.1319145359.34.18.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=wizz");

    DataOutputStream out = new DataOutputStream(conn.getOutputStream());

    Set keys = data.keySet();
    Iterator keyIter = keys.iterator();
    String content = "";
    for(int i=0; keyIter.hasNext(); i++) {
        Object key = keyIter.next();
        if(i!=0) {
            content += "&";
        }
        content += key + "=" + URLEncoder.encode(data.get(key), "UTF-8");
    }
    System.out.println(content);
    out.writeBytes(content);
    out.flush();
    out.close();
    BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String line = "";
    while((line=in.readLine())!=null) {
        System.out.println(line);
    }
    in.close();
}

....上記のHTTPフォームデータに見られるように、次のパラメータを使用して呼び出します。

    String url = "http://wizzair.com/en-GB/Select";
    Map<String, String> data = new TreeMap<String, String>();
    data.put("__EVENTTARGET", "HeaderControlGroupRibbonSelectView_AvailabilitySearchInputRibbonSelectView_ButtonSubmit");
    data.put("__VIEWSTATE", "/wEPDwUBMGRkNSMYF94e4mXCiiJGEJbRixyidoa2QXSambTT2mm6cLs=\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$OriginStation:EIN\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$DestinationStation:OTP\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$DepartureDate:02/02/2013\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$ReturnDate:05/02/2013\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$PaxCountADT:1\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$PaxCountCHD:0\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$PaxCountINFANT:0\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$BaggageCount:0\n"+
            "HeaderControlGroupRibbonSelectView$AvailabilitySearchInputRibbonSelectView$ButtonSubmit:Search"

ただし、返される応答は、そのWebサイトからの一般的なWebページであり、期待した回答ではありません。私は何を間違っているのですか？

どうもありがとう、ご挨拶、ソリン

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