基于标准的http来实现Android多文件上传，android文件上传,实现多文件的上传，基于标

基于标准的http来实现Android多文件上传，android文件上传,实现多文件的上传，基于标

实现多文件的上传，基于标准的http来实现。多文件上传MyUploader类的实现：```java/ * * 同步上传多个文件 * 基于标准的http实现，需要在非UI线程中调用，以免阻塞UI。 /public class MyUploader { private static final String TAG = "MyUploader";

// ////////////////////同步上传多个文件/////////    /**     * 同步上传File     *      * @param Url     * @param fullFileName     *            : 全路径，ex. /sdcard/f/yh.jpg     * @param fileName     *            : file name, ex. yh.jpg     * @return 服务器的响应结果(字符串形式)     */    public String MyUploadMultiFileSync(String Url,            List<String> fileList, Map<String, String> params) {        String reulstCode = "";        String end = "\r\n";        String twoHyphens = "--";        String boundary = "--------boundary";        try {            URL url = new URL(actionUrl);            HttpURLConnection con = (HttpURLConnection) url.openConnection();            // 允许Input、Output，不使用Cache            con.setDoInput(true);            con.setDoOutput(true);            con.setUseCaches(false);            // 设置传送的method=POST            con.setRequestMethod("POST");            // setRequestProperty            con.setRequestProperty("Connection", "Keep-Alive");            con.setRequestProperty("Charset", "UTF-8");            // con.setRequestProperty("Content-Type",            // "application/x-www-form-urlencoded");            con.setRequestProperty("Content-Type",                    "multipart/form-data;boundary=" + boundary);            StringBuffer s = new StringBuffer();            // 设置DataOutputStream            DataOutputStream dos = new DataOutputStream(con.getOutputStream());            for (int i = 0; i < fileList.size(); i++) {                String filePath = fileList.get(i);                int endFileIndex = filePath.lastIndexOf("/");                String fileName = filePath.substring(endFileIndex + 1);                Log.i(TAG, "filename= " + fileName);                // set 头部                StringBuilder sb = new StringBuilder();                sb.append(twoHyphens);                sb.append(boundary);                sb.append(end);                sb.append("Content-Disposition: form-data; ");                sb.append("name=" + "\"" + "upload_file" +i + "\"");                sb.append(";filename=");                sb.append("\"" + fileName + "\"");                sb.append(end);                sb.append("Content-Type: ");                sb.append("image/jpeg");                sb.append(end);                sb.append(end);                // 1. write sb                dos.writeBytes(sb.toString());                // 取得文件的FileInputStream                FileInputStream fis = new FileInputStream(filePath);                // 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 = fis.read(buffer)) != -1) {                    dos.write(buffer, 0, length);                }                dos.writeBytes(end);                fis.close();                dos.writeBytes(end);                dos.writeBytes(end);                //dos.writeBytes(end);                //dos.flush();                // close streams                //fis.close();            }            // set 尾部            StringBuilder sb2 = new StringBuilder();            if (params != null &amp;&amp; !params.isEmpty()) {                for (String key : params.keySet()) {                    String value = params.get(key);                    sb2.append(twoHyphens);                    sb2.append(boundary);                    sb2.append(end);                    sb2.append("Content-Disposition: form-data; ");                    sb2.append("name=" + "\"");                    sb2.append(key + "\"");                    sb2.append(end);                    sb2.append(end);                    sb2.append(value);                    sb2.append(end);                }            }            sb2.append(twoHyphens + boundary + end);            dos.writeBytes(sb2.toString());            dos.flush();            Log.i(TAG, "sb2:" + sb2.toString());            // 取得Response内容            InputStream is = con.getInputStream();            int ch;            StringBuffer b = new StringBuffer();            while ((ch = is.read()) != -1) {                b.append((char) ch);            }            reulstCode = b.toString().trim();            // 关闭            dos.close();        } catch (IOException e) {            Log.i(TAG, "IOException: " + e);            e.printStackTrace();        }        return reulstCode;    }

}

 2. 调用方法： 由于MyUploader的MyUploadMultiFileSync本身是同步的函数请求，所以，这个函数需要在非UI线程中执行。本例采用Thread+Handler的方式来进行说明。下面是activity的主要代码,功能是将cache目录中的的jpg文件上传到指定的服务器：```javapublic void uploadThreadTest() {        new Thread(new Runnable() {            @Override            public void run() {                try {                    upload();                } catch (Exception e) {                    e.printStackTrace();                }            }        }).start();    }    private void upload() {        String url = "https://httpbin.org/post";        List<String> fileList = getCacheFiles();        if (fileList == null) {            myHandler.sendEmptyMessage(-1);        }else {            MyUploader myUpload = new MyUploader();            //同步请求，直接返回结果，根据结果来判断是否成功。            String reulstCode = myUpload.MyUploadMultiFileSync(url, fileList, null);            Log.i(TAG, "upload reulstCode: " + reulstCode);            myHandler.sendEmptyMessage(0);        }    }    private List<String> getCacheFiles() {        List<String> fileList = new ArrayList<String>();        File catchPath = mContext.getCacheDir();        if (catchPath!=null &amp;&amp; catchPath.isDirectory()) {            File[] files = catchPath.listFiles();            if (files == null || files.length<1) {                return null;            }            for (int i = 0; i < files.length; i++) {                if (files[i].isFile() &amp;&amp; files[i].getAbsolutePath().endsWith(".jpg")) {                    fileList.add(files[i].getAbsolutePath());                }            }            return fileList;        }        return null;    }    ////////////handler/////    private Handler myHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            Log.i(TAG,"handleMessage msg===" + msg);            if (msg.what == -1) {                Toast.makeText(mContext, "not find file!", Toast.LENGTH_LONG).show();                return;            }else {                Toast.makeText(mContext, "upload success!", Toast.LENGTH_LONG).show();            }        }    };

3 项目demo代码地址： https://github.com/ranke/HttpAsyncTest