Http请求之基于HttpUrlConnection，支持Header,Body传值，支持Multipart上传文件：

Http请求之基于HttpUrlConnection，支持Header,Body传值，支持Multipart上传文件：

1. public static String post(String actionUrl, Map<String, String> headParams,
2. Map<String, String> params,
3. Map<String, File> files) throws IOException {
4. String BOUNDARY = java.util.UUID.randomUUID().toString();
5. String PREFIX = "--", LINEND = "\r\n";
6. String MULTIPART_FROM_DATA = "multipart/form-data";
7. String CHARSET = "UTF-8";
8. URL uri = new URL(actionUrl);
9. HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
10. conn.setReadTimeout(30 * 1000); // 缓存的最长时间
11. conn.setDoInput(true);// 允许输入
12. conn.setDoOutput(true);// 允许输出
13. conn.setUseCaches(false); // 不允许使用缓存
14. conn.setRequestMethod("POST");
15. conn.setRequestProperty("connection", "keep-alive");
16. conn.setRequestProperty("Charsert", "UTF-8");
17. conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA
18. + ";boundary=" + BOUNDARY);
19. if(headParams!=null){
20. for(String key : headParams.keySet()){
21. conn.setRequestProperty(key, headParams.get(key));
22. }
23. }
24. StringBuilder sb = new StringBuilder();
25. if (params!=null) {
26. // 首先组拼文本类型的参数
27. for (Map.Entry<String, String> entry : params.entrySet()) {
28. sb.append(PREFIX);
29. sb.append(BOUNDARY);
30. sb.append(LINEND);
31. sb.append("Content-Disposition: form-data; name=\""
32. + entry.getKey() + "\"" + LINEND);
33. sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
34. sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
35. sb.append(LINEND);
36. sb.append(entry.getValue());
37. sb.append(LINEND);
38. }
39. }
40. DataOutputStream outStream = new DataOutputStream(
41. conn.getOutputStream());
42. if (!TextUtils.isEmpty(sb.toString())) {
43. outStream.write(sb.toString().getBytes());
44. }
45. // 发送文件数据
46. if (files != null)
47. for (Map.Entry<String, File> file : files.entrySet()) {
48. StringBuilder sb1 = new StringBuilder();
49. sb1.append(PREFIX);
50. sb1.append(BOUNDARY);
51. sb1.append(LINEND);
52. sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""
53. + file.getKey() + "\"" + LINEND);
54. sb1.append("Content-Type: application/octet-stream; charset="
55. + CHARSET + LINEND);
56. sb1.append(LINEND);
57. outStream.write(sb1.toString().getBytes());
58. InputStream is = new FileInputStream(file.getValue());
59. byte[] buffer = new byte[1024];
60. int len = 0;
61. while ((len = is.read(buffer)) != -1) {
62. outStream.write(buffer, 0, len);
63. Log.i("HttpUtil", "写入中...");
64. }
65. is.close();
66. outStream.write(LINEND.getBytes());
67. }
68. // 请求结束标志
69. byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
70. outStream.write(end_data);
71. outStream.flush();
72. Log.i("HttpUtil", "conn.getContentLength():"+conn.getContentLength());
73. // 得到响应码
74. int res = conn.getResponseCode();
75. InputStream in = conn.getInputStream();
76. if (res == 200) {
77. BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in, "UTF-8"));
78. StringBuffer buffer = new StringBuffer();
79. String line = "";
80. while ((line = bufferedReader.readLine()) != null){
81. buffer.append(line);
82. }
83. //          int ch;
84. //          StringBuilder sb2 = new StringBuilder();
85. //          while ((ch = in.read()) != -1) {
86. //              sb2.append((char) ch);
87. //          }
88. return buffer.toString();
89. }
90. outStream.close();
91. conn.disconnect();
92. return in.toString();
93. }