java httpurlconnection 发送cookie时,cookie要在Post前发送

Java代码

1. public InputStreamgetStream(URLurl,Stringpost,URLcookieurl){
2. HttpURLConnectionconnection;
3. StringcookieVal=null ;
4. StringsessionId="" ;
5. Stringkey=null ;
6. if (cookieurl!= null ){
7. try {
8. connection=(HttpURLConnection)cookieurl.openConnection();
9. for ( int i= 1 ;(key=connection.getHeaderFieldKey(i))!= null ;i++){
10. if (key.equalsIgnoreCase( "set-cookie" )){
11. cookieVal=connection.getHeaderField(i);
12. cookieVal=cookieVal.substring(0 ,cookieVal.indexOf( ";" ));
13. sessionId=sessionId+cookieVal+";" ;
14. }
15. }
16. InputStreamin=connection.getInputStream();
17. System.out.println(sessionId);
18. }catch (MalformedURLExceptione){
19. System.out.println("urlcan'tconnection" );
20. return null ;
21. }catch (IOExceptione){
22. System.out.println(e.getMessage());
23. return null ;
24. }
25. }
27. try {
28. connection=(HttpURLConnection)url.openConnection();
29. //这个要写在Post前,否则会取不到值,原因我不知道
30. if (cookieurl!= null ){
31. connection.setRequestProperty("Cookie" ,sessionId);
32. }
33. if (post!= "" ){
34. connection.setDoOutput(true );
35. connection.setRequestMethod("POST" );
36. connection.getOutputStream().write(post.getBytes());
37. connection.getOutputStream().flush();
38. connection.getOutputStream().close();
39. }
40. int responseCode=connection.getResponseCode();
41. int contentLength=connection.getContentLength();
42. //System.out.println("Contentlength:"+contentLength);
43. if (responseCode!=HttpURLConnection.HTTP_OK) return ( null );
44. InputStreamin=connection.getInputStream();
45. return (in);
46. }
47. catch (Exceptione){
48. //System.out.println(e);
49. //e.printStackTrace();
50. return ( null );
51. }
53. }

转自：http://stephenjqj.javaeye.com/blog/477194