android 上传文件到服务器代码

private static final String TAG = "TTTTTT upload";

private static final int TIME_OUT = 10 * 1000; // 超时时间

private static final String CHARSET = "utf-8"; // 设置编码

public static String uploadFile(File file, String RequestURL) {

String result = null;

String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成

String CONTENT_TYPE = "multipart/form-data"; // 内容类型

try {

URL url = new URL(RequestURL);

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setReadTimeout(TIME_OUT);

conn.setConnectTimeout(TIME_OUT);

conn.setDoInput(true); // 允许输入流

conn.setDoOutput(true); // 允许输出流

conn.setUseCaches(false); // 不允许使用缓存

conn.setRequestMethod("POST"); // 请求方式

conn.setRequestProperty("Charset", CHARSET); // 设置编码

conn.setRequestProperty("connection", "keep-alive");

conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);

if (file != null) {

/**

* 当文件不为空，把文件包装并且上传

*/

DataOutputStream dos = newDataOutputStream(conn.getOutputStream());

InputStream is = new FileInputStream(file);

byte[] bytes = new byte[1024];

int len = 0;

while ((len = is.read(bytes)) != -1) {

dos.write(bytes, 0, len);

}

is.close();

dos.flush();

/**

* 获取响应码 200=成功 当响应成功，获取响应的流

*/

int res = conn.getResponseCode();

Log.e(TAG, "response code:" + res);

if (res == 200) {

Log.e(TAG, "request success");

InputStream input = conn.getInputStream();

StringBuffer sb1 = new StringBuffer();

int ss;

while ((ss = input.read()) != -1) {

sb1.append((char) ss);

}

result = sb1.toString();

Log.e(TAG, "result : " + result);

}

}else{

Log.e(TAG, "file not found！");

}

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return result;

}

}