在Http请求中，很多时候我们要设置Cookie和获取返回的Cookie，在这个问题上踩了一个很大的坑，主要是两个问题：
1.不能获取到重定向返回的Cookie；
2.两次请求返回的Cookie是相同的；
（接口是苏宁登录的接口，是用ids_r_me兑换authId的，这是单点登录常见的方式）后来我花了一点时间把几种不同的包中的坑总结一下：
第一个：apache下在httpclient
???????<dependency> ???????????<groupId>org.apache.httpcomponents</groupId> ???????????<artifactId>httpclient</artifactId> ???????????<version>4.5.6</version> ???????</dependency>
这个包在获取重定向Cookie时，会存在丢失Cookie的情况，这个包没有提供获取Cookie的借口方法，只能是通过Header获取Cookie和Set-Cookie获取返回的Cookie，用这个包发送Http请求好像没有存储重定向的Cookie，过程中肯定是有用到的，但是没有对外提供获取Cookie的接口，代码如下：
1 ????/** 2 ?????* apache httpclient 4.5.6 test redirect Cookie 3 ?????*/ 4 ????@Test 5 ????public void Test_2() throws IOException { 6 ????????List<String> list = new ArrayList(); 7 ????????list.add("NjIyMDY5MDk1M19CUk9XU0VSXz**********************************18wXzQ2OWM1ZjI3 NDdjN2RmYzRiZWI3Njg3MDllNzI3MmFj"); 8 ????????list.add("NzEwNDIyNjQwN19CUk9XU0VSXz**********************************M18wX2JiZWQ5YmVkMjJiOTAyZDNjYmNkZTk4NGM0NmFiYmMz"); 9 ????????String url = "https://passport.suning.com/ids/login?service=https%3A%2F%2Fmy.suning.com%2Fmsi-web%2Fauth%3FtargetUrl%3Dhttps%253A%252F%252Floginst.suning.com%252FauthStatus%253F_%253D1540179466121%2526callback%253DZepto1540179465802";10 11 ????????for (String token : list) {12 ????????????HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();13 ????????????CloseableHttpClient httpClient = httpClientBuilder.build();14 ????????????HttpGet httpGet = new HttpGet(url);15 ????????????httpGet.setHeader("Cookie", "ids_r_me=" + token);16 ????????????CloseableHttpResponse response = httpClient.execute(httpGet);17 ????????????org.apache.http.Header[] headers = response.getAllHeaders();18 ????????????for (org.apache.http.Header header : headers) {19 ????????????????System.out.println(header.getName() + "=" + header.getValue());20 ????????????}21 ????????????System.out.println(EntityUtils.toString(response.getEntity()) );22 ????????}23 ????}因为没有找到获取Cookie的接口，所以打印了所有的header。
第二个：hutool
???????<dependency> ???????????<groupId>cn.hutool</groupId> ???????????<artifactId>hutool-all</artifactId> ???????????<version>4.2.1</version> ???????</dependency>
这个包默认是可以获取Cookie的，但是开始遇到的问题是，第二次请求时获取的Cookie和第一次一样，因为这个包中的cookieManager是一个静态变量，但是第二次请求应该会覆盖掉才对，具体为什么不回覆盖没有再深追，后来找到了它提供的一个清空cookieManager中cookieStore的方法，问题就解决了。两次请求获取的是正常的Cookie。代码如下：
1 ????/** 2 ?????* Hutool 4.2.1 test redirect Cookie 3 ?????*/ 4 ????@Test 5 ????public void Test_1() { 6 ????????List<String> list = new ArrayList(); 7 ????????list.add("NjIyMDY5MDk1M19CUk9XU0VSXz**********************************18wXzQ2OWM1ZjI3 NDdjN2RmYzRiZWI3Njg3MDllNzI3MmFj"); 8 ????????list.add("NzEwNDIyNjQwN19CUk9XU0VSXz**********************************M18wX2JiZWQ5YmVkMjJiOTAyZDNjYmNkZTk4NGM0NmFiYmMz"); 9 ????????String url = "https://passport.suning.com/ids/login?service=https%3A%2F%2Fmy.suning.com%2Fmsi-web%2Fauth%3FtargetUrl%3Dhttps%253A%252F%252Floginst.suning.com%252FauthStatus%253F_%253D1540179466121%2526callback%253DZepto1540179465802";10 ????????for (String token : list) {11 12 ????????????HttpRequest request = HttpUtil.createGet(url);13 ????????????Map header = new HashMap();14 ????????????header.put("Cookie", "ids_r_me=" + token);15 ????????????request = request.addHeaders(header);16 17 ????????????HttpResponse response = request.execute();18 19 ????????????List<HttpCookie> cookieList = response.getCookies();20 ????????????System.out.println("Cookie:");21 ????????????for (HttpCookie cookie : cookieList) {22 ????????????????System.out.println(cookie.getName() + "=" + cookie.getValue());23 ????????????}24 ????????????HttpRequest.getCookieManager().getCookieStore().removeAll();25 ????????}26 ????}其中第24行是清除本次请求中的Cookie，如果放在response.getCookies()之前，就不能获取到Cookie了，所以应该是获取到Cookie后，清除本次请求的Cookie。
第三个：commons-httpclient
???????<dependency> ???????????<groupId>commons-httpclient</groupId> ???????????<artifactId>commons-httpclient</artifactId> ???????????<version>3.1</version> ???????</dependency>
这个包发送请求返回的有点奇怪，但是习惯了感觉好像也挺合理，代码如下：
1 ????/** 2 ?????* commons-httpclient 3.1 test redirect Cookie 3 ?????* 4 ?????* @throws IOException 5 ?????*/ 6 ????@Test 7 ????public void Test_3() throws IOException { 8 ????????List<String> list = new ArrayList(); 9 ????????list.add("NjIyMDY5MDk1M19CUk9XU0VSXz**********************************18wXzQ2OWM1ZjI3 NDdjN2RmYzRiZWI3Njg3MDllNzI3MmFj");10 ????????list.add("NzEwNDIyNjQwN19CUk9XU0VSXz**********************************M18wX2JiZWQ5YmVkMjJiOTAyZDNjYmNkZTk4NGM0NmFiYmMz");11 ????????String url = "https://passport.suning.com/ids/login?service=https%3A%2F%2Fmy.suning.com%2Fmsi-web%2Fauth%3FtargetUrl%3Dhttps%253A%252F%252Floginst.suning.com%252FauthStatus%253F_%253D1540179466121%2526callback%253DZepto1540179465802";12 ????????for (String token : list) {13 ????????????HttpClient httpClient = new HttpClient();14 ????????????GetMethod getMethod = new GetMethod(url);15 16 ????????????getMethod.setRequestHeader(new Header("Cookie", "ids_r_me=" + token));17 ????????????Integer state = httpClient.executeMethod(getMethod);18 ????????????Cookie[] cookieArray = httpClient.getState().getCookies();19 ????????????for (Cookie cookie : cookieArray) {20 ????????????????System.out.println(cookie.getName() + "=" + cookie.getValue());21 ????????????}22 ????????????System.out.println("responseBody:"+getMethod.getResponseBodyAsString());23 ????????}24 ????}其中第17行返回的是本次请求的状态码，第22行是获取本次请求返回内容。
关于Http请求Cookie问题
原文地址：https://www.cnblogs.com/ben-mario/p/10034049.html