1，浏览器的底层是：客户端；

2，服务器的底层就是：服务端；

3，HTTP协议在返回数据时的固定格式：

  1. OutputStream outputStream = socket.getOutputStream();
  2. OutputStream out = socket.getOutputStream();
  3. out.write("HTTP/1.1 200 OK\r\n".getBytes());
  4. //告诉浏览器这是一个网页，编码为utf-8
  5. out.write("Content-Type:text/html;charset=utf-8\r\n".getBytes());
  6. out.write("\r\n".getBytes());

4，代码示例：

  1. public class Text01 {
  3.     public static void main(String[] args) throws IOException {
  5.         System.out.println("start");
  7.         ServerSocket serverSocket = new ServerSocket(9527);
  9.         while (true) {
  11.             Socket socket = serverSocket.accept();
  13.             //
  14.             OutputStream outputStream = socket.getOutputStream();
  15.             OutputStream out = socket.getOutputStream();
  16.             out.write("HTTP/1.1 200 OK\r\n".getBytes());
  17.             out.write("Content-Type:text/html;charset=utf-8\r\n".getBytes());
  18.             out.write("\r\n".getBytes());
  20.             out.write("<h1>ffffffffffffffffff<h1>".getBytes());
  22.         }
  24.     }
  26. }