如何使用Java HTTP Server发送文件？

问题描述

This代码流摄像头和Java http服务器。

此浏览器中的此代码流网络摄像头的URL为http：// localhost：8080

我要使用相同的方法发送文件以供下载。

在这种方法中，java http服务器流网络摄像头。我想使用相同的方法从PC发送文件。

打开http：// localhost：8080时，它将在浏览器中下载文件。

网络摄像头流示例代码：

public class HttpStreamServer implements Runnable {


private BufferedImage img = null;
private ServerSocket serverSocket;
private Socket socket;
private final String boundary = "stream";
private OutputStream outputStream;
public Mat imag;

public HttpStreamServer(Mat imagFr) {
    this.imag = imagFr;
}


public void startStreamingServer() throws IOException {
    serverSocket = new ServerSocket(8080);
    socket = serverSocket.accept();
    writeHeader(socket.getOutputStream(),boundary);
}

private void writeHeader(OutputStream stream,String boundary) 
throws IOException {
    stream.write(("HTTP/1.0 200 OK\r\n" +
            "Connection: close\r\n" +
            "Max-Age: 0\r\n" +
            "Expires: 0\r\n" +
            "Cache-Control: no-store,no-cache,must-revalidate,pre- 
  check=0,post-check=0,max-age=0\r\n" +
            "Pragma: no-cache\r\n" +
            "Content-Type: multipart/x-mixed-replace; " +
            "boundary=" + boundary + "\r\n" +
            "\r\n" +
            "--" + boundary + "\r\n").getBytes());
  }

  public void pushImage(Mat frame) throws IOException {
    if (frame == null)
        return;
    try {
        outputStream = socket.getOutputStream();
        BufferedImage img = Mat2bufferedImage(frame);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ImageIO.write(img,"jpg",baos);
        byte[] imageBytes = baos.toByteArray();
        outputStream.write(("Content-type: image/jpeg\r\n" +
                "Content-Length: " + imageBytes.length + "\r\n" +
                "\r\n").getBytes());
        outputStream.write(imageBytes);
        outputStream.write(("\r\n--" + boundary + "\r\n").getBytes());
    } catch (Exception ex) {
        socket = serverSocket.accept();
        writeHeader(socket.getOutputStream(),boundary);
     }
  }


  public void run() {
    try {
        System.out.print("go to  http://localhost:8080 with browser");
        startStreamingServer();

        while (true) {
            pushImage(imag);
        }
    } catch (IOException e) {
        return;
    }

 }

 public void stopStreamingServer() throws IOException {
    socket.close();
    serverSocket.close();
 }

public static BufferedImage Mat2bufferedImage(Mat image) 
throws IOException {
    MatOfByte bytemat = new MatOfByte();
    Imgcodecs.imencode(".jpg",image,bytemat);
    byte[] bytes = bytemat.toArray();
    InputStream in = new ByteArrayInputStream(bytes);
    BufferedImage img = null;
    img = ImageIO.read(in);
    return img;
}
}

我想使用this方法发送文件。

我该怎么做？

解决方法

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