java后台用post方式提交参数

 

1.  public static void main(String[] args) {
2.      URL url = null;
3.      HttpURLConnection httpurlconnection = null;
4.      try {
5.          url = new URL("http://www.ip138.com/ips.asp");
6.          httpurlconnection = (HttpURLConnection) url.openConnection();
7.          httpurlconnection.setDoInput(true);
8.          httpurlconnection.setDoOutput(true);
9.
10.         httpurlconnection.setRequestMethod("POST");
11.         httpurlconnection.setRequestProperty("Content-Type",
12.                 "application/x-www-form-urlencoded");
13.
14.         String username = "ip=192.168.0.1";
15.         httpurlconnection.getOutputStream().write(username.getBytes());
16.
17.         httpurlconnection.getOutputStream().flush();
18.         httpurlconnection.getOutputStream().close();
19.         int code = httpurlconnection.getResponseCode();
20.         System.out.println("code    " + code);
21.
22.         if (code == 200) {
23.
24.             String cookie = httpurlconnection.getHeaderField("Set-Cookie ");
25.             System.out.println(cookie);
26.             // httpurlconnection.setRequestProperty( "Cookie", cookie);
27.
28.             DataInputStream in = new DataInputStream(httpurlconnection
29.                     .getInputStream());
30.             int len = in.available();
31.             byte[] by = new byte[len];
32.             in.readFully(by);
33.             String rev = new String(by);
34.             System.out.println(rev);
35.             in.close();
36.         }
37.     } catch (Exception e) {
38.         e.printStackTrace();
39.     } finally {
40.         if (httpurlconnection != null) {
41.             httpurlconnection.disconnect();
42.         }
43.     }
44. }