java httpclient 重定向_如何在HttpClient中自动重定向(java,apache)

我创建了httpClient并设置了设置

HttpClient client = new HttpClient();

client.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);

client.getParams().setContentCharset("UTF-8");

第一次请求(获取)

GetMethod first = new GetMethod("http://vk.com");

int returnCode = client.executeMethod(first);

BufferedReader br = null;

String lineResult = "";

if (returnCode == HttpStatus.SC_NOT_IMPLEMENTED) {

System.err.println("The Post method is not implemented by this URI");

// still consume the response body

first.getResponseBodyAsString();

} else {

br = new BufferedReader(new InputStreamReader(first.getResponseBodyAsStream(), Charset.forName("windows-1251")));

String readLine = "";

while (((readLine = br.readLine()) != null)) {

lineResult += readLine;

}

}

回应正确.

第二个请求(帖子)：

PostMethod second = new PostMethod("http://login.vk.com/?act=login");

second.setRequestHeader("Referer", "http://vk.com/");

second.addParameter("act", "login");

second.addParameter("al_frame", "1");

second.addParameter("captcha_key", "");

second.addParameter("captcha_sid", "");

second.addParameter("expire", "");

second.addParameter("q", "1");

second.addParameter("from_host", "vk.com");

second.addParameter("email", email);

second.addParameter("pass", password);

returnCode = client.executeMethod(second);

br = null;

lineResult = "";

if (returnCode == HttpStatus.SC_NOT_IMPLEMENTED) {

System.err.println("The Post method is not implemented by this URI");

// still consume the response body

second.getResponseBodyAsString();

} else {

br = new BufferedReader(new InputStreamReader(second.getResponseBodyAsStream()));

String readLine = "";

while (((readLine = br.readLine()) != null)) {

lineResult += readLine;

}

}

这个响应也是正确的,但我需要重定向到Headers.Location.

我不知道如何从Headers Location获取价值或如何自动启用重定向.