android 用httpClient和HttpUrlConnection上传文件

HttpClient上传文件用到httpmime-4.1.3.jar,直接上代码

String url = "http://192.168.2.12:8080/UploadFile/default/uploadFile.action";MultipartEntity entity = new MultipartEntity();FileBody body = new FileBody(new File("/mnt/sdcard/test2.apk"));entity.addPart("file", body);entity.addPart("fileFileName", new StringBody("test2.apk", Charset.forName("utf-8")));HttpPost post = new HttpPost(url);post.setEntity(entity);HttpClient client = new DefaultHttpClient();HttpResponse response = client.execute(post);int stateCode = response.getStatusLine().getStatusCode();if (stateCode == HttpStatus.SC_OK) {String result  = EntityUtils.toString(response.getEntity());System.out.println(result);}

比较简单，上传大文件也没什么问题。

HttpUrlConnection上传比较麻烦点，自己要构造出头文件，这边直接从网上copy的代码，好想是谁的博客里面的，如果有侵权啥的，私聊我，或者让我删除，都可以。代码如下：

public class HttpUrlConnectionUploadFile {public static String post(String actionUrl, Map<String, String> params, Map<String, File> files) throws IOException {        String BOUNDARY = java.util.UUID.randomUUID().toString();String PREFIX = "--", LINEND = "\r\n";String MULTIPART_FROM_DATA = "multipart/form-data";String CHARSET = "UTF-8";        URL uri = new URL(actionUrl);HttpURLConnection conn = (HttpURLConnection) uri.openConnection();conn.setChunkedStreamingMode(0);conn.setReadTimeout(5 * 1000);conn.setDoInput(true);conn.setDoOutput(true);conn.setUseCaches(false);conn.setRequestMethod("POST");conn.setRequestProperty("connection", "keep-alive");conn.setRequestProperty("Charsert", "UTF-8");conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);        // 首先组拼文本类型的参数StringBuilder sb = new StringBuilder();for (Map.Entry<String, String> entry : params.entrySet()) {sb.append(PREFIX);sb.append(BOUNDARY);sb.append(LINEND);sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);sb.append("Content-Transfer-Encoding: 8bit" + LINEND);sb.append(LINEND);sb.append(entry.getValue());sb.append(LINEND);}        DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());outStream.write(sb.toString().getBytes());// 发送文件数据if (files != null)for (Map.Entry<String, File> file : files.entrySet()) {StringBuilder sb1 = new StringBuilder();sb1.append(PREFIX);sb1.append(BOUNDARY);sb1.append(LINEND);sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + file.getKey() + "\"" + LINEND);sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);sb1.append(LINEND);outStream.write(sb1.toString().getBytes());                InputStream is = new FileInputStream(file.getValue());byte[] buffer = new byte[1024];int len = 0;while ((len = is.read(buffer)) != -1) {outStream.write(buffer, 0, len);}                is.close();outStream.write(LINEND.getBytes());}        // 请求结束标志byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();outStream.write(end_data);outStream.flush();// 得到响应码int res = conn.getResponseCode();InputStream in = conn.getInputStream();if (res == 200) {int ch;StringBuilder sb2 = new StringBuilder();while ((ch = in.read()) != -1) {sb2.append((char) ch);}}outStream.close();conn.disconnect();return in.toString();}}

conn.setChunkedStreamingMode(0);强调下，如果不加这句话，android上传大文件的时候，容易出现内存溢出。

服务端我用的是struts2，和android关系不大，也没什么难度，代码就不贴了。

还有就是用socket上传了，http://blog.csdn.net/shimiso/article/details/8529633 这有高手写好了，挺不错的，推荐下。