Android文件上传

1/**
2	 * 上传文件
3	 * 
4	 * @param uploadUrl
5	 *            上传地址
6	 * @param param
7	 *            参数
8	 * @param filepath
9	 *            文件路径
10	 * @return 结果
11	 */
12	public static String upload(String uploadUrl, HashMap<String, String> param, String fieldName, String filepath) {
13		StringBuilder result = null;
14		try {
15			String boundary = "---------------------------esa000000000001";
16			URL url = new URL(uploadUrl);
17			HttpURLConnection connection = (HttpURLConnection) url.openConnection();
18			connection.setDoOutput(true);
19			connection.setDoInput(true);
20			connection.setUseCaches(false);
21			connection.setConnectTimeout(1000 * 20);
22			connection.setReadTimeout(1000 * 20);
23			connection.setRequestMethod("POST");
24			connection.setRequestProperty("Connection", "Keep-Alive");
25			connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
26			connection.setRequestProperty("Charsert", "UTF-8");
27
28			File file = new File(filepath);
29			StringBuilder sbf = new StringBuilder();
30			sbf.append("--" + boundary + "\r\n");
31			sbf.append("Content-Disposition: form-data; name=\"" + fieldName + "\"; filename=\"" + file.getName() + "\"\r\n");
32			sbf.append("Content-Type: application/octet-stream" + "\r\n\r\n");
33			byte[] fz = sbf.toString().getBytes();
34			StringBuilder sb = new StringBuilder();
35			sb.append("\r\n\r\n");
36			Iterator<String> iterator = param.keySet().iterator();
37			while (iterator.hasNext()) {
38				String key = iterator.next();
39				String value = param.get(key);
40				sb.append("--" + boundary + "\r\n");
41				sb.append("Content-Disposition: form-data; name=\"" + key + "\"\r\n");
42				sb.append("\r\n");
43				sb.append(value + "\r\n");
44			}
45			byte[] before = sb.toString().getBytes();
46			byte[] after = ("\r\n--" + boundary + "--\r\n").getBytes();
47			connection.setRequestProperty("content-length", (before.length + fz.length + file.length() + after.length) + "");
48			DataOutputStream dos = new DataOutputStream(connection.getOutputStream());
49			dos.write(fz);
50			FileInputStream fis = new FileInputStream(file);
51			byte[] buffer = new byte[1024 * 10];
52			int len;
53			while ((len = fis.read(buffer)) != -1) {
54				dos.write(buffer, 0, len);
55			}
56			dos.write(before);
57			dos.write(after);
58			dos.flush();
59			int code = connection.getResponseCode();
60			InputStream stream = connection.getInputStream();
61			byte[] b = new byte[1024 * 10];
62			int l;
63			result = new StringBuilder();
64			while ((l = stream.read(b)) != -1) {
65				result.append(new String(b, 0, l, "utf-8"));
66			}
67			fis.close();
68			dos.close();
69			stream.close();
70		} catch (MalformedURLException e) {
71		} catch (ProtocolException e) {
72		} catch (IOException e) {
73		} finally {
74
75		}
76		if (result == null) {
77			return null;
78		} else {
79			return result.toString();
80		}
81	}