Android Tomcat 的應用之客戶端部分

最近因為做一個客戶端的登錄部分，最後選擇了使用Tomcat作為servlet服務器，MySQL作為數據庫，今天就先寫了一下客戶端的部分，主要就是Android的網絡編程部分，服務器端編程明天再寫吧，今天有點累了。

相關閱讀：Android Tomcat 的應用之服務器部分 http://www.linuxidc.com/Linux/2012-03/55916.htm

首先是布局文件，如下：

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:orientation="vertical" >
7. <TextView
8. android:layout_width="fill_parent"
9. android:layout_height="wrap_content"
10. android:text="@string/hello" />
12. <TableLayout >
13. <TableRow >
14. <TextView
15. android:id="@+id/tv_name"
16. android:layout_width="wrap_content"
17. android:layout_height="wrap_content"
18. android:text="@string/nameStr"/>
19. <EditText
20. android:id="@+id/et_name"
21. android:layout_width="fill_parent"
22. android:layout_height="wrap_content"/>
23. </TableRow>
24. <TableRow >
25. <TextView
26. android:id="@+id/tv_passwd"
27. android:layout_width="wrap_content"
28. android:layout_height="wrap_content"
29. android:text="@string/passwdStr"/>
30. <EditText
31. android:id="@+id/et_passwd"
32. android:layout_width="fill_parent"
33. android:layout_height="wrap_content"
34. android:password="true"/>
35. </TableRow>
36. <TableRow >
37. <Button
38. android:id="@+id/btn_confirm"
39. android:layout_width="wrap_content"
40. android:layout_height="wrap_content"
41. android:text="@string/btn_confirm"/>
42. <Button
43. android:id="@+id/btn_cancel"
44. android:layout_width="wrap_content"
45. android:layout_height="wrap_content"
46. android:text="@string/btn_cancel"/>
47. </TableRow>
48. </TableLayout>
50. </LinearLayout>

然後就是進行網絡編程部分了，肯定是要用到post方式，這個部分就做一個單獨的工具類，大家看一下就明白：

1. package com.chenlong12580.app.tomcat;
3. import java.io.IOException;
5. import org.apache.http.HttpResponse;
6. import org.apache.http.client.ClientProtocolException;
7. import org.apache.http.client.methods.HttpGet;
8. import org.apache.http.client.methods.HttpPost;
9. import org.apache.http.impl.client.DefaultHttpClient;
10. import org.apache.http.util.EntityUtils;
12. public class HttpUtil {
13. // 基礎URL
14. public static final String BASE_URL="http://222.20.60.132:8080/WebRoot/";
15. // 獲得Get請求對象request
16. public static HttpGet getHttpGet(String url){
17. HttpGet request = new HttpGet(url);
18. return request;
19. }
20. // 獲得Post請求對象request
21. public static HttpPost getHttpPost(String url){
22. HttpPost request = new HttpPost(url);
23. return request;
24. }
25. // 根據請求獲得響應對象response
26. public static HttpResponse getHttpResponse(HttpGet request) throws ClientProtocolException, IOException{
27. HttpResponse response = new DefaultHttpClient().execute(request);
28. return response;
29. }
30. // 根據請求獲得響應對象response
31. public static HttpResponse getHttpResponse(HttpPost request) throws ClientProtocolException, IOException{
32. HttpResponse response = new DefaultHttpClient().execute(request);
33. return response;
34. }
36. // 發送Post請求，獲得響應查詢結果
37. public static String queryStringForPost(String url){
38. // 根據url獲得HttpPost對象
39. HttpPost request = HttpUtil.getHttpPost(url);
40. String result = null;
41. try {
42. // 獲得響應對象
43. HttpResponse response = HttpUtil.getHttpResponse(request);
44. // 判斷是否請求成功
45. if(response.getStatusLine().getStatusCode()==200){
46. // 獲得響應
47. result = EntityUtils.toString(response.getEntity());
48. return result;
49. }
50. } catch (ClientProtocolException e) {
51. e.printStackTrace();
52. result = "網絡異常！";
53. return result;
54. } catch (IOException e) {
55. e.printStackTrace();
56. result = "網絡異常！";
57. return result;
58. }
59. return null;
60. }
61. // 獲得響應查詢結果
62. public static String queryStringForPost(HttpPost request){
63. String result = null;
64. try {
65. // 獲得響應對象
66. HttpResponse response = HttpUtil.getHttpResponse(request);
67. // 判斷是否請求成功
68. if(response.getStatusLine().getStatusCode()==200){
69. // 獲得響應
70. result = EntityUtils.toString(response.getEntity());
71. return result;
72. }
73. } catch (ClientProtocolException e) {
74. e.printStackTrace();
75. result = "網絡異常！";
76. return result;
77. } catch (IOException e) {
78. e.printStackTrace();
79. result = "網絡異常！";
80. return result;
81. }
82. return null;
83. }
84. // 發送Get請求，獲得響應查詢結果
85. public static String queryStringForGet(String url){
86. // 獲得HttpGet對象
87. HttpGet request = HttpUtil.getHttpGet(url);
88. String result = null;
89. try {
90. // 獲得響應對象
91. HttpResponse response = HttpUtil.getHttpResponse(request);
92. // 判斷是否請求成功
93. if(response.getStatusLine().getStatusCode()==200){
94. // 獲得響應
95. result = EntityUtils.toString(response.getEntity());
96. return result;
97. }
98. } catch (ClientProtocolException e) {
99. e.printStackTrace();
100. result = "網絡異常！";
101. return result;
102. } catch (IOException e) {
103. e.printStackTrace();
104. result = "網絡異常！";
105. return result;
106. }
107. return null;
108. }
109. }