java how to handle http get request after establishing tcp connection

1ServerSocket serverSock = new ServerSocket(6789);
2Socket sock = serverSock.accept();
3
4InputStream sis = sock.getInputStream();
5BufferedReader br = new BufferedReader(new InputStreamReader(sis));
6String request = br.readLine(); // Now you get GET index.html HTTP/1.1`
7String[] requestParam = request.split(" ");
8String path = requestParam[1];
9
10PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
11File file = new File(path);
12if (!file.exists()) {
13     out.write("HTTP 404"); // the file does not exists
14}
15FileReader fr = new FileReader(file);
16BufferedReader bfr = new BufferedReader(fr);
17String line;
18while ((line = bfr.readLine()) != null) {
19    out.write(line);
20}
21
22bfr.close();
23br.close();
24out.close();
25