Android應用開發之Android平台向web應用提交信息

GET方式

實驗：提交視頻名稱、時長信息

url：

http://192.168.1.102:8080/videoweb/video/manage.do?method=save&name=xxx&timelength=90

資源

1. <string name="app_name">VideoClient</string>
3. <string name="name">視頻名稱</string>
5. <string name="timeLength">時長</string>
7. <string name="save">保存</string>
9. <string name="success">數據保存成功</string>
11. <string name="fail">數據保存失敗</string>
13. <string name="error">網絡連接失敗</string>
15. <string name="videoFile">視頻文件</string>

布局

1. <TextView
3. Android:layout_width="fill_parent"
5. android:layout_height="wrap_content"
7. android:text="@string/name" />
11. <EditText
13. android:id="@+id/nameEt"
15. android:layout_width="match_parent"
17. android:layout_height="wrap_content" >
21. <requestFocus />
23. </EditText>
27. <TextView
29. android:layout_width="fill_parent"
31. android:layout_height="wrap_content"
33. android:text="@string/timeLength" />
37. <EditText
39. android:id="@+id/timeLengthEt"
41. android:layout_width="match_parent"
43. android:layout_height="wrap_content" >
45. </EditText>
49. <Button
51. android:id="@+id/saveBtn"
53. android:layout_width="wrap_content"
55. android:layout_height="wrap_content"
57. android:text="save" />

VideoService

1. public static boolean save(String name, String timeLength) throws Exception {
3. String path = "http://192.168.1.102:8080/videoweb/video/manage.do";
5. Map<String, String> params = new HashMap<String, String>();
7. params.put("name", name);
9. params.put("timelength", timeLength);
11. params.put("method", "save");
15. return sendPostRequestHttpClient(path, params, "UTF-8");
17. }
21. private static boolean sendPostRequestHttpClient(String path,
23. Map<String, String> params, String string) throws Exception {
25. // http://192.168.1.102:8080/videoweb/video/manage.do?method=save&name=xxx&timelength=90
27. StringBuilder pathBuilder = new StringBuilder(path);
29. pathBuilder.append("?");
33. for (Map.Entry<String, String> entry : params.entrySet()) {
35. pathBuilder.append(entry.getKey()).append("=")
37. .append(entry.getValue()).append("&");
39. }
41. pathBuilder.deleteCharAt(pathBuilder.length() - 1);
45. URL url = new URL(pathBuilder.toString());
47. HttpURLConnection conn = (HttpURLConnection) url.openConnection();
49. conn.setRequestMethod("GET");
51. conn.setConnectTimeout(5000);
53. if (conn.getResponseCode() == 200) {
55. return true;
57. }
59. return false;
61. }

測試方法代碼

VideoServiceTest

1. public void testSave() throws Throwable{
3. VideoService.save("Sucan", "80");
5. }

中文字符解決方案：

服務器端代碼：

1. VideoForm formbean = (VideoForm)form;
3. if("GET".equals(request.getMethod())){
5. String name = new String(request.getParameter("name")
7. .getBytes("ISO8859-1"),"UTF-8");
9. System.out.println("視頻名稱: "+ name);
11. System.out.println("時長: "+formbean.getTimelength());
13. }else{
15. System.out.println("視頻名稱: "+formbean.getName());
17. System.out.println("時長: "+formbean.getTimelength());
19. }

客戶端的VideoService中

POST方式

修改服務器端代碼

Index.jsp

1. <form action="http://192.168.1.102:8080/videoweb/video/manage.do"
3. method="post" >
5. <input type="hidden" name="method" value="save"><br/>
7. 視頻名稱：<input type="text" name="name" value=""><br/>
9. 時長：<input type="text" name="timelength" value=""><br/>
13. <input type="submit" value="提交">
15. </form>

利用HttpWatch對post傳輸進行簡單講解：

1. POST /videoweb/video/manage.do HTTP/1.1
3. Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
5. Referer: http://192.168.1.102:8080/videoweb/
7. Accept-Language: zh-cn,en-GB;q=0.5
9. User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727)
11. Content-Type: application/x-www-form-urlencoded
13. Accept-Encoding: gzip, deflate
15. Host: 192.168.1.102:8080
17. Content-Length: 34
19. Connection: Keep-Alive
21. Cache-Control: no-cache
23. Cookie: JSESSIONID=AE51607F874103B085624AD38C68CF56
27. method=save&name=xxxx&timelength=2

編寫業務類方法（VideoService）

1. private static boolean sendPostRequestHttpClient(String path,
3. Map<String, String> params, String encoding) throws Exception {
5. /*
7. * Content-Type: application/x-www-form-urlencoded
9. * Content-Length: 34
11. * method=save&name=xxxx&timelength=2
13. */
15. StringBuffer sb = new StringBuffer("");
17. if (params != null && !params.isEmpty()) {
19. for (Map.Entry<String, String> entry : params.entrySet()) {
21. sb.append(entry.getKey()).append("=")
23. // .append(entry.getValue()).append("&");
25. .append(URLEncoder.encode(entry.getValue(), encoding)).append('&'); //url編碼，解決中文亂碼
27. }
29. sb.deleteCharAt(sb.length() - 1);
31. }
35. byte[] data = sb.toString().getBytes(); //得到實體數據eg. method=save&name=xxxx&timelength=2
37. URL url = new URL(path);
39. HttpURLConnection conn = (HttpURLConnection) url.openConnection();
41. conn.setRequestMethod("POST");
43. conn.setConnectTimeout(5000);
45. conn.setDoOutput(true); //允許通過POST方式提交數據，必須允許輸出
47. conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
49. conn.setRequestProperty("Content-Length", String.valueOf(data.length));
53. OutputStream outStream = conn.getOutputStream();
55. outStream.write(data);
57. outStream.flush();
59. outStream.close();
63. if (conn.getResponseCode() == 200) {
65. return true;
67. }
69. return false;
71. }

修改save方法

1. // return sendGetRequestHttpClient(path, params, "UTF-8");
3. return sendPostRequest(path, params, "UTF-8");