Android 通过httppost上传文本文件到服务器的实例代码

/*** 往服务器上上传文本 比如log日志* @param urlstr 请求的url * @param uploadFile log日志的路径 * /mnt/shell/emulated/0/LOG/LOG.log * @param newName log日志的名字 LOG.log* @return*/public static void httpPost(Activity activity,String urlstr,String uploadFile,String newName) {LogUtil.info("getEhttpPostt", "urlstr="+urlstr+";uploadFile="+uploadFile+";newName="+newName,"i");String end = "/r/n";String twoHyphens = "--";String boundary = "*****";//边界标识 int TIME_OUT = 10*1000; //超时时间HttpURLConnection con = null; DataOutputStream ds = null; InputStream is = null;try {URL url = new URL(urlstr);con = (HttpURLConnection) url.openConnection();con.setReadTimeout(TIME_OUT);con.setConnectTimeout(TIME_OUT);/* 允许Input、Output，不使用Cache */con.setDoInput(true);con.setDoOutput(true);con.setUseCaches(false);// 设置http连接属性con.setRequestMethod("POST");//请求方式con.setRequestProperty("Connection", "Keep-Alive");//在一次TCP连接中可以持续发送多份数据而不会断开连接con.setRequestProperty("Charset", "UTF-8");//设置编码con.setRequestProperty("Content-Type",//multipart/form-data能上传文件的编码格式"multipart/form-data;boundary=" + boundary);ds = new DataOutputStream(con.getOutputStream());ds.writeBytes(twoHyphens + boundary + end);ds.writeBytes("Content-Disposition: form-data; "+ "name=/"stblog/";filename=/"" + newName + "/"" + end);ds.writeBytes(end);// 取得文件的FileInputStreamFileInputStream fStream = new FileInputStream(uploadFile);/* 设置每次写入1024bytes */int bufferSize = 1024;byte[] buffer = new byte[bufferSize];int length = -1;/* 从文件读取数据至缓冲区 */while ((length = fStream.read(buffer)) != -1) {/* 将资料写入DataOutputStream中 */ds.write(buffer, 0, length);}ds.writeBytes(end);ds.writeBytes(twoHyphens + boundary + twoHyphens + end);//结束fStream.close();ds.flush();/* 取得Response内容 */is = con.getInputStream();int ch;StringBuffer b = new StringBuffer();while ((ch = is.read()) != -1) {b.append((char) ch);}/* 将Response显示于Dialog */showDialog(activity,true,uploadFile,"上传成功" + b.toString().trim());} catch (Exception e) {showDialog(activity,false,uploadFile,"上传失败" + e);}finally {/* 关闭DataOutputStream */if(ds!=null){try {ds.close();} catch (IOException e) {e.printStackTrace();}}if (is != null) {try {is.close();} catch (IOException e) {e.printStackTrace();}}if (con != null) {con.disconnect();}}}/* 显示Dialog的method */private static void showDialog(final Activity activity,final Boolean isSuccess,final String uploadFile,final String mess) {activity.runOnUiThread(new Runnable() {@Overridepublic void run() {new AlertDialog.Builder(activity).setTitle("Message").setMessage(mess).setNegativeButton("确定", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {File file = new File(uploadFile);if(file.exists()&&isSuccess){//日志文件存在且上传日志成功file.delete();Toast.makeText(activity, "log日志已删除", Toast.LENGTH_SHORT).show();}}}).show();}});}