Android http附带参数的文件上传

/**
*
* @param urlString 路径
* @param params 上传参数
* @param files 上传文件
* @return 返回结果
* @throws IOException
*/

public static String doPost(String urlString, Map<String, Object> params,
Map<String, byte[]> 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(urlString+encodeParams(params));
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
conn.setReadTimeout(10 * 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);

DataOutputStream outStream = new DataOutputStream(
conn.getOutputStream());
if (files != null) {
for (Map.Entry<String, byte[]> file : files.entrySet()) {
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition: form-data; name=\"userupfile\"; filename=\""
+ file.getKey() + "\"" + LINEND);
sb1.append("Content-Type: application/octet-stream; charset="
+ CHARSET + LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());
outStream.write(file.getValue());
outStream.write(LINEND.getBytes());
}
}

byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
outStream.write(end_data);
outStream.flush();

int res = conn.getResponseCode();
String in = null;
if (res == HttpURLConnection.HTTP_OK) {
in = getStringFromStream(conn.getInputStream());
}
return in;
}

//    　Accept: text/plain, */*//　　Accept-Language: zh-cn//　　Host: 192.168.24.56//　　Content-Type:multipart/form-data;boundary=-----------------------------7db372eb000e2//　　User-Agent: WinHttpClient//　　Content-Length: 3693//　　Connection: Keep-Alive//　　-------------------------------7db372eb000e2//　　Content-Disposition: form-data; name="file"; filename="kn.jpg"//　　Content-Type: image/jpeg//　　(此处省略jpeg文件二进制数据...）//　　-------------------------------7db372eb000e2--

/*** 本方法需要导入httpmime的jar包** @param urlPath 请求路径* @param params  上传参数 

* @param files 上传文件的本地路径

* @return 服务器返回结果

 * @throws IOException*/public static String doPostByHttpClient(String urlPath, Map<String, Object> params, Map<String, String> files) throws IOException {HttpClient client = new DefaultHttpClient();HttpPost post = new HttpPost(urlPath);MultipartEntity mpEntity = new MultipartEntity();for (Map.Entry<String, String> file : files.entrySet()) {ContentBody cbFile = new FileBody(new File(file.getValue()));mpEntity.addPart(file.getKey(), cbFile);}for (Map.Entry<String, Object> entry : params.entrySet()) {mpEntity.addPart(entry.getKey(), new StringBody((String) entry.getValue(), "text/plain", Charset.forName("UTF-8")));}post.setEntity(mpEntity);String res = null;HttpResponse response = client.execute(post);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {res = getStringFromStream(response.getEntity().getContent());}String content = EntityUtils.toString(response.getEntity());client.getConnectionManager().shutdown();return res;}