//商品浏览详细信息记录商品id,存到cookie中package com.kt.servlet_qt;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;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 com.kt.bean.Easybuy_Shangpin;import com.kt.bean.Easybuy_ShangpinFenlei;import com.kt.dao.impl.Easybuyimpl;public class merchandisetype extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); String uid = request.getParameter("uid"); String uname = request.getParameter("uname"); Easybuyimpl e = new Easybuyimpl(); Easybuy_Shangpin all_ID_Shangpin = e.all_ID_Shangpin(Integer .parseInt(uid)); // 拿到商品id int id = all_ID_Shangpin.getEp_id(); // 保存商品id Cookie cookie1 = null; // 初始创建cookie cookie1 = new Cookie("cookis_id", ""); cookie1.setValue(id + ","); // 多少秒过期 cookie1.setMaxAge(7 * 24 * 60 * 60); // 添加到客户端 response.addCookie(cookie1); // 先获取cookie是否有值 Cookie[] ck = request.getCookies(); // 进行判断 if (ck != null) { // 定义累加值的变量为空 String value = ""; // 循环cookie拿值 for (Cookie cookie : ck) { // 判断是否存在cookis_id名称 if (cookie.getName().equals("cookis_id")) { // 拿到cookie最新值 value = cookie.getValue(); // 将cookie分割以（","）分割 String[] split = value.split(","); // 清空所定义的值，进行下一轮拼接 value = ""; // 创建集合 List list = new ArrayList (); // 循环数组将值添加到list集合中 for (int i = 0; i < split.length; i++) { list.add(split[i]); } if (split.length < 5) { // 循环判断拿到的值是否有相同的如果有就移除 for (int i = 0; i < list.size(); i++) { if (Integer.parseInt(list.get(i)) == id) { list.remove(i); } } } else { // 移除 list.remove(0); // 循环判断拿到的值是否有相同的如果有就移除 for (int i = 0; i < list.size(); i++) { if (Integer.parseInt(list.get(i)) == id) { list.remove(i); } } } for (String string : list) { value += string + ","; } cookie1 = new Cookie("cookis_id", value + id + ","); // 多少秒过期 cookie1.setMaxAge(7 * 24 * 60 * 60); // 添加到客户端 response.addCookie(cookie1); } } } request.getRequestDispatcher("product-view.jsp").forward(request, response); out.flush(); out.close(); }}//获取cookie拿到值，传给jsp界面package com.kt.servlet_qt;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.HashSet;import java.util.List;import java.util.Set;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 com.kt.bean.Easybuy_Shangpin;import com.kt.bean.Easybuy_ShangpinFenlei;import com.kt.bean.Easybuy_xinwen;import com.kt.dao.impl.Easybuyimpl;public class blank extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); // 获取cookie所存放的值 Cookie[] cookies = request.getCookies(); if (cookies != null) {// 判断cookie是否为空 // 创建集合 ArrayList all_cookle_Shangpin = new ArrayList (); // 定义一个用分解cookie的变量 String value = ""; // 循环cookie判断是否存在cookis_id for (Cookie cookie : cookies) { if (cookie.getName().equals("cookis_id")) { // 接收cookie的值 value = cookie.getValue(); // 然后以（"，"）分解拿到数据ID String[] split = value.split(","); // 循环添加到 all_cookle_Shangpin集合中将最新数据传递给jsp页面 for (int i = 0; i < split.length; i++) { all_cookle_Shangpin.add(e .all_cookle_Shangpin( Integer.parseInt(split[split.length - (i + 1)])).get(0));// split[split.length- // (i + // 1)]指的是从最新的开始拿数据 } // 存到会话中 request.getSession().setAttribute("all_cookle_Shangpin", all_cookle_Shangpin); } } } // 使用转发 request.getRequestDispatcher("index.jsp").forward(request, response); out.flush(); out.close(); }} QQ1015420659,喜欢结交朋友，技术交流