关于用http client模拟登录教务系统的问题

response = httpclient.execute(httppost,context);
String result = response.getStatusLine().toString();
System.out.println(result);
HttpEntity entity1 = response.getEntity();
System.out.println(EntityUtils.toString(entity1));
Header locationHeader =response.getFirstHeader("location");

System.out.println(locationHeader.toString());
             String newuri = "http://jwxt1.cumt.edu.cn"+locationHeader.getValue(); 


         System.out.println(result);     
            HttpGet redirect=new HttpGet(newuri);  

            CloseableHttpResponse response1=httpclient.execute(redirect,context);  
            HttpEntity entity = response1.getEntity();
              System.out.println(EntityUtils.toString(entity)); 


            redirect.releaseConnection();  
返回的结果```
HTTP/1.1 302 Moved Temporarily
Object moved
Object moved to here.
Location: /xs_main.aspx?xh=我的学号

用httpclient模拟登陆学校的方正教务系统 post数据以后再获取重定向的地址进行get访问 为何不行