转载：http://blog.csdn.net/zhangbinu/article/details/72777620
一、旧版本的HttpClient获取Cookies
p.s. 该方式官方已不推荐使用
使用DefaultHttpClient类实例化httpClient对象：
public static String dooPost_deprecated(String url, Map<String, String> map, String charset) {
DefaultHttpClient httpClient = null;
HttpPost httpPost = null;
String result = null;
try {
httpClient = new DefaultHttpClient();
httpPost = new HttpPost(url);
// 设置参数
List<NameValuePair> list = new ArrayList<NameValuePair>();
Iterator<Entry<String, String>> iterator = map.entrySet().iterator();
while (iterator.hasNext()) {
Entry<String, String> elem = (Entry<String, String>) iterator.next();
list.add(new BasicNameValuePair(elem.getKey(), elem.getValue()));
}
if (list.size() > 0) {
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, charset);
httpPost.setEntity(entity);
}
HttpResponse response = httpClient.execute(httpPost);
System.out.println(response.getStatusLine().getStatusCode());
String JSESSIONID = null;
String cookie_user = null;
//获得Cookies
CookieStore cookieStore = httpClient.getCookieStore();
List<Cookie> cookies = cookieStore.getCookies();
for (int i = 0; i < cookies.size(); i++) {
//遍历Cookies
System.out.println(cookies.get(i));
System.out.println("cookiename=="+cookies.get(i).getName());
System.out.println("cookieValue=="+cookies.get(i).getValue());
System.out.println("Domain=="+cookies.get(i).getDomain());
System.out.println("Path=="+cookies.get(i).getPath());
System.out.println("Version=="+cookies.get(i).getVersion());
if (cookies.get(i).getName().equals("JSESSIONID")) {
JSESSIONID = cookies.get(i).getValue();
}
if (cookies.get(i).getName().equals("cookie_user")) {
cookie_user = cookies.get(i).getValue();
}
}
if (cookie_user != null) {
result = JSESSIONID;
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}二、新版本的HttpClient获取Cookies
使用CloseableHttpClient类实例化httpClient对象：
public static String doPost(Map<String, String> map, String charset) {
CloseableHttpClient httpClient = null;
HttpPost httpPost = null;
String result = null;
try {
CookieStore cookieStore = new BasicCookieStore();
httpClient = HttpClients.custom().setDefaultCookieStore(cookieStore).build();
httpPost = new HttpPost("http://localhost:8080/testtoolmanagement/LoginServlet");
List<NameValuePair> list = new ArrayList<NameValuePair>();
Iterator<Map.Entry<String, String>> iterator = map.entrySet().iterator();
while (iterator.hasNext()) {
Entry<String, String> elem = (Entry<String, String>) iterator.next();
list.add(new BasicNameValuePair(elem.getKey(), elem.getValue()));
}
if (list.size() > 0) {
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, charset);
httpPost.setEntity(entity);
}
httpClient.execute(httpPost);
String JSESSIONID = null;
String cookie_user = null;
List<Cookie> cookies = cookieStore.getCookies();
for (int i = 0; i < cookies.size(); i++) {
if (cookies.get(i).getName().equals("JSESSIONID")) {
JSESSIONID = cookies.get(i).getValue();
}
if (cookies.get(i).getName().equals("cookie_user")) {
cookie_user = cookies.get(i).getValue();
}
}
if (cookie_user != null) {
result = JSESSIONID;
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}HttpClient及其jar包下载地址：官网链接