java访问webservcie URL

1.  登录时保存cookie

1 private String responseCookie;

 1     /**
 2      * 根据URL地址和参数，获取返回数据
 3      */
 4     private String login_postMethod(String url, String jsonParam) throws IOException {
 5         URL postUrl = new URL(url);
 6         HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();
 7         connection.setDoOutput(true);
 8         connection.setDoInput(true);
 9         connection.setRequestMethod("POST"); // 设置访问类型
10         connection.setUseCaches(false);
11         connection.setInstanceFollowRedirects(true);
12         connection.setRequestProperty("Content-Type", "application/json"); //设置参数类型
13         connection.setRequestProperty("Connection", "Keep-Alive");
14         connection.connect();
15
16         DataOutputStream out = new DataOutputStream(connection.getOutputStream());
17         out.writeBytes(jsonParam);
18         out.flush();
19         out.close();
20
21         BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));//设置返回数据编码
22         responseCookie = connection.getHeaderField("Set-Cookie");// 取到所用的Cookie
23
24         // 获取请求返回结果
25         String result = "";
26         String line;
27         while ((line = reader.readLine()) != null) {
28             result += line;
29         }
30
31         reader.close();
32         connection.disconnect();
33
34         logger.info("url : " + url);
35         logger.info(result);
36
37         return result;
38     }

2 .根据首次登录保存的cookie，再次访问webservice接口

 1     /**
 2      * 根据URL地址和参数，获取返回数据
 3      */
 4     private String reconnnect_postMethod(String url, String jsonParam) throws IOException {
 5         URL postUrl = new URL(url);
 6         HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();
 7         connection.setRequestProperty("Cookie", responseCookie); // 设置login时返回的cookie
 8         connection.setDoOutput(true);
 9         connection.setDoInput(true);
10         connection.setRequestMethod("POST");
11         connection.setUseCaches(false);
12         connection.setInstanceFollowRedirects(true);
13         connection.setRequestProperty("Content-Type", "application/json");
14         connection.connect();
15
16         DataOutputStream out = new DataOutputStream(connection.getOutputStream());
17         out.writeBytes(jsonParam);
18         out.flush();
19         out.close();
20
21         BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
22
23         // 获取请求返回结果
24         String result = "";
25         String line;
26         while ((line = reader.readLine()) != null) {
27             result += line;
28         }
29
30         reader.close();
31         connection.disconnect();
32
33         return result;
34     }