[Android教程] android的 Http工具类

android的HttpClient实现简单的get和post请求

2. /**
3. * Http工具类
4. */
5. public class HttpUtil {
6. // 创建HttpClient对象
7. public static HttpClient httpClient = new DefaultHttpClient();
8. public static final String BASE_URL = "";
9. http://m.hwjbyby.com/nxby/dnlc/281.html
10. /**
11. * get请求
12. *
13. * @param url
14. * 发送请求的URL
15. * @return 服务器响应字符串
16. * @throws Exception
17. */
18. public static String doGet(String url) throws Exception {
19. // 创建HttpGet对象。
20. HttpGet get = new HttpGet(url);
21. // 发送GET请求
22. HttpResponse httpResponse = httpClient.execute(get);
23. // 如果服务器成功地返回响应
24. if (httpResponse.getStatusLine().getStatusCode() == 200) {
25. // 获取服务器响应字符串
26. HttpEntity entity = httpResponse.getEntity();
27. InputStream content = entity.getContent();
28. return convertStreamToString(content);
29. }
30. return null;
31. }
33. /**
34. * post请求
35. *
36. * @param url
37. * 发送请求的URL
38. * @param params
39. * 请求参数
40. * @return 服务器响应字符串
41. * @throws Exception
42. */http://m.hwjbyby.com/nxby/lcxby/282.html
43. public static String doPost(String url, Map<String, String> rawParams)
44. throws Exception {
45. // 创建HttpPost对象。
46. HttpPost post = new HttpPost(url);
47. // 如果传递参数个数比较多的话可以对传递的参数进行封装
48. List<NameValuePair> params = new ArrayList<NameValuePair>();
49. for (String key : rawParams.keySet()) {
50. // 封装请求参数
51. params.add(new BasicNameValuePair(key, rawParams.get(key)));
52. }
53. // 设置请求参数
54. post.setEntity(new UrlEncodedFormEntity(params, "utf-8"));
55. // 发送POST请求
56. HttpResponse httpResponse = httpClient.execute(post);
57. // 如果服务器成功地返回响应
58. if (httpResponse.getStatusLine().getStatusCode() == 200) {
59. // 获取服务器响应字符串
60. HttpEntity entity = httpResponse.getEntity();
61. InputStream content = entity.getContent();
62. return convertStreamToString(content);
63. }
64. return null;
65. }
67. /**
68. * 获取服务器的响应，转换为字符串
69. */
70. private static String convertStreamToString(InputStream is) {
71. BufferedReader reader = new BufferedReader(new InputStreamReader(is));
72. StringBuilder sb = new StringBuilder();
73. String line = null;
74. try {
75. while ((line = reader.readLine()) != null) {
76. sb.append(line);
77. }
78. } catch (IOException e) {
79. e.printStackTrace();
80. } finally {
81. try {
82. is.close();
83. } catch (IOException e) {
84. e.printStackTrace();
85. }http://m.hwjbyby.com/nxby/lcxby/282.html
86. }m.hwjbyby.com/nxby
87. return sb.toString();
88. }
89. }