【笔记】HTTP-POST多文件上传

/**
 * 后台程序
 * https://github.com/TrillGates/SOBAndroidMiniWeb
 *
 */
public class PostTextActivity extends AppCompatActivity {

    public ArrayList<String> mArrayList;    //用于存放遍历到的图片路径
    private String TAG = "PostTextActivity";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_post_text);

        //获取储存卡读取权限
        int permission = checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE);
        Log.d(TAG, "permission-- >" + permission);
        if (permission == PackageManager.PERMISSION_DENIED) {
            requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
        }
    }
    //post请求：上传多张图片“扫描整个保存截图的目录把目录里的图片全部上传”
    public void onClickImages(View view) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                OutputStream outputStream = null;
                //准备图片资源
                if (mArrayList != null) {
                    mArrayList.clear();//清空下
                }
                mArrayList = new ArrayList<>();//把图片路径存入此集合
                File file = new File("/sdcard/Pictures");
                getAllFilePath(file);//获取所有图片的绝对路径
                Log.d(TAG, "扫描到=" + mArrayList.size() + "张图片");

                try {

                    String BOUNDARY = "--------------------------694710120812426434874443";
                    String fileKey = "files";
                    URL url = new URL("http://192.168.1.216:9102" + "/files/upload");
                    HttpURLConnection httpurlconnection = (HttpURLConnection) url.openConnection();
                    httpurlconnection.setRequestMethod("POST");
                    httpurlconnection.setConnectTimeout(10000);
                    //设置请求头
                    httpurlconnection.setRequestProperty("User-Agent", "OnePlus A3000");
                    httpurlconnection.setRequestProperty("Accept", "*/*");
                    httpurlconnection.setRequestProperty("Cache-Control", "no-cache");
                    httpurlconnection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);
                    httpurlconnection.setRequestProperty("Connection", "keep-alive");
                    httpurlconnection.setDoInput(true);//发送POST请求必须设置允许输入
                    httpurlconnection.setDoOutput(true);//发送POST请求必须设置允许输出


                    //连接
                    httpurlconnection.connect();
                    outputStream = httpurlconnection.getOutputStream();
                    //准备好图片路径
                    if (mArrayList != null) {
                        boolean isLast;//是否是最后一张图
                        for (int i = 0; i < mArrayList.size(); i++) {
                            File imageFile = new File(mArrayList.get(i));
                            if (i == (mArrayList.size() - 1)) {
                                isLast = true;
                            } else {
                                isLast = false;
                            }
                            //Log.d(TAG,";;;;;;;;;"+imageFile+imageFile.getName()+fileKey+isLast);
                            uploadImages(imageFile, imageFile.getName(), BOUNDARY, fileKey, outputStream, isLast);
                        }
                    }
                    outputStream.flush();//刷新下，不刷新也没发现问题 为什么要刷新？？？？？？？

                    //获取响应码,,,输出服务端返回的信息
                    int responseCode = httpurlconnection.getResponseCode();
                    Log.d(TAG, "responseCode-- >" + responseCode);
                    if (responseCode == HttpURLConnection.HTTP_OK) {
                        InputStream inputStream = httpurlconnection.getInputStream();
                        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
                        Log.d(TAG, "上传成功这是返回信息--- >" + bufferedReader.readLine());
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    try {
                        outputStream.close();//关闭流释放资源
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

            }

            /**
             * @param file         图片的路径，要上传的图片的路径
             * @param fileName     图片的名称
             * @param BOUNDARY     这个是请求头里的那啥玩意
             * @param fileKey      接口参数
             * @param outputStream
             * @throws IOException
             */
            private void uploadImages(File file, String fileName, String BOUNDARY, String fileKey, OutputStream outputStream, boolean isLast) throws IOException {
                //设置请求体的请求头。。。
                StringBuilder stringBuilder = new StringBuilder();
                stringBuilder.append("--");
                stringBuilder.append(BOUNDARY + "\r\n");
                stringBuilder.append("Content-Disposition: form-data; name=\"" + fileKey + "\"; filename=\"" + fileName + "\"" + "\r\n");
                stringBuilder.append("Content-Type: image/png" + "\r\n");//image/jpeg
                stringBuilder.append("\r\n");

                //写入数据
                byte[] bytes = stringBuilder.toString().getBytes("UTF-8");
                outputStream.write(bytes);//将请求体的请求头。写入
                //将图片写入
                BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(file));
                byte[] bytes1 = new byte[1024];
                int len;
                while ((len = bufferedInputStream.read(bytes1, 0, bytes1.length)) != -1) {
                    outputStream.write(bytes1, 0, len);
                }

                //写请求体的 尾部信息
                StringBuilder sb = new StringBuilder();
                if (isLast) {
                    sb.append("\r\n");
                    sb.append("--" + BOUNDARY + "--" + "\r\n");
                    sb.append("\r\n");
                } else {
                    sb.append("\r\n");
                    sb.append("--" + BOUNDARY + "\r\n");
                }

                outputStream.write(sb.toString().getBytes("UTF-8"));
                //outputStream.flush();//刷新下
            }
        }).start();
    }

    //扫描截图目录 为多文件上传,准备图片
    public void getAllFilePath(File srcFile) {

        //获取指定目录所有的文件或者目录的File数组
        File[] fileArray = srcFile.listFiles();
        //遍历该File数组，得到每一个File对象
        if (fileArray != null) {
            for (File file : fileArray) {
                //判断该File对象是否是文件
                if (file.isFile()) {
                    //是：就把图片的路径添加到集合
                    String absolutePath = file.getAbsolutePath();
                    boolean add = mArrayList.add(absolutePath);
                    Log.d(TAG, "是否添加成功??????????????" + add);
                } else {
                    //不是：递归
                    getAllFilePath(file);
                }
            }
        }

    }
}