如何在java中向特定的客户端发送响应？

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 设置响应内容类型
        response.setContentType("text/html");

        // 获取特定的客户端IP地址
        String clientIP = request.getRemoteAddr();

        // 向特定的客户端发送响应
        response.getWriter().println("Hello, " + clientIP);
    }
}