Unit06： 状态管理-cookie

 

 

web

package web;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class FindCostServlet extends HttpServlet {

    //相当于MainServlet.findCost()
    @Override
    protected void service(
        HttpServletRequest req, 
        HttpServletResponse res) throws ServletException, IOException {
        Cookie[] cs = req.getCookies();
        if(cs != null) {
            res.setContentType(
                "text/html;charset=utf-8");
            PrintWriter out = res.getWriter();
            for(Cookie c : cs) {
                out.println(
                    c.getName()+":"+c.getValue());
            }
            out.close();
        }
    }

}

FindCostServlet.java