httpclient获取cookie为空

Question

什么情况下，从登入页面到index页面时，理论上login到index，可以得到cookie，会有jsessionId,但是获取的时候是空；代码：
public static void main(String[] args) {

// 登陆 Url

String loginUrl = "http://192.168.1.127:8080/propertyLogin.html";

// 需登陆后访问的 Url

String dataUrl = "http://192.168.1.127:8080/propertyadmin/index.do";

        HttpClient httpClient = new HttpClient();  

        // 模拟登陆，按实际服务器端要求选用 Post 或 Get 请求方式  
        PostMethod postMethod = new PostMethod(loginUrl);  

        // 设置登陆时要求的信息，用户名和密码  
        NameValuePair[] data = { new NameValuePair("userName", "10000000002"),  
                new NameValuePair("passWord", "123456") };  
        postMethod.setRequestBody(data);  
        try {  
            // 设置 HttpClient 接收 Cookie,用与浏览器一样的策略  
            httpClient.getParams().setCookiePolicy(  
                    CookiePolicy.BROWSER_COMPATIBILITY);  
            int a = httpClient.executeMethod(postMethod);  
            // 获得登陆后的 Cookie  
            Cookie[] cookies = httpClient.getState().getCookies();  
            StringBuffer tmpcookies = new StringBuffer();  
            for (Cookie c : cookies) {  
                tmpcookies.append(c.toString() + ";"); 
            } 

            System.out.println("cookie:"+  httpClient.getState()+"==》结束");
            // 进行登陆后的操作1581,1602,1603,1610,1609,1608,1607,1606,1605,1620,1619,1617,1616,1622,1626,1642,1648,1647,1657  
            GetMethod getMethod = new GetMethod(dataUrl);  
            // 每次访问需授权的网址时需带上前面的 cookie 作为通行证  
            getMethod.setRequestHeader("cookie",  tmpcookies.toString());  
            // 你还可以通过 PostMethod/GetMethod 设置更多的请求后数据  
            // 例如，referer 从哪里来的，UA 像搜索引擎都会表名自己是谁，无良搜索引擎除外  
            postMethod.setRequestHeader("Referer", "http://192.168.1.127:8080/propertyadmin/index.do");  
            postMethod.setRequestHeader("User-Agent", "www Spot");  
            httpClient.executeMethod(getMethod);  
            // 打印出返回数据，检验一下是否成功  
            String text = getMethod.getResponseBodyAsString();  
            System.out.println(text);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    } 

        cookie的执行结果：
          System.out.println("cookie:"+  httpClient.getState()+"==》结束");
            ==》cookie:[ |  | ]==》结束

            但是浏览器上的结果是：![图片说明](https://img-ask.csdn.net/upload/201706/21/1498027781_348950.png)

Answer 1

https://www.cnblogs.com/ceshi2016/p/7244608.html