Java如何在Servlet中读取cookie？

package org.nhooo.example.servlet;

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

public class ReadCookieExample extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter writer = response.getWriter();

        Cookie[] cookies = request.getCookies();
        for (int i = 0; i < cookies.length; i++) {
            writer.println("Name: " + cookies[i].getName() + "; Value: " + cookies[i].getValue());            
        }
    }

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

上面的servlet的示例结果是：

Name: JSESSIONID; Value: A1BF9D70A238CB3359946ABA8FC3212D