javaweb使用HTTP协议实现大媒体在线播放代码示例

下面是一个使用HTTP协议实现大媒体在线播放的JavaWeb代码示例：

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MediaServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;

  protected void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    String fileName = request.getParameter("file");
    String filePath = "/path/to/media/" + fileName;
    FileInputStream fileInputStream = new FileInputStream(filePath);
    BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
    OutputStream outputStream = response.getOutputStream();
    BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(outputStream);
    response.setContentType("video/mp4");
    response.setHeader("Content-Disposition", "inline; filename=" + fileName);
    byte[] buffer = new byte[8192];
    int length;
    while ((length = bufferedInputStream.read(buffer)) > 0) {
      bufferedOutputStream.write(buffer, 0, length);
    }
    bufferedOutputStream.flush();
    bufferedOutputStream.close();
    bufferedInputStream.close();
  }

  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    doGet(request, response);
  }
}

在上面的示例中，我们创建了一个名为 `MediaServlet` 的 servlet，用于处理客户端请求并提供视频文件的流式传输。当客户端请求该 servlet 时，servlet 会读取请求参数中指定的视频文件，并将其作为 HTTP 响应的一部分传输回客户端。在响应头中设置了 `Content-Type` 和 `Content-Disposition`，以便告知客户端响应的文件类型和文件名。

请注意，上述代码示例中的 `/path/to/media/` 应该被替换为实际存储视频文件的路径。