会话管理 session实现多页面传输数据

以下面购物车几个页面传输数据为例html页面有index.html

 <!DOCTYPE html>

 <html lang="en">

 <head>

     <meta charset="UTF-8">

     <title>首页</title>

     <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

 </head>

 <body>

 <ul>

     <li><a href="fuzhuang.html">服装</a></li>

     <li><a href="shipin.html">食品</a></li>

     <li><a href="dianzi.html">电子</a></li>

 </ul>

 <input type="button" id="view" value="查看购物车">

 <script>

     $("#view").click(function () {

         $.get("getgoods",function (data) {

             alert(data.goods);

         });

     });

 </script>

 </body>

 </html>

后面是三个副页fuzhuang.html;shipin.html;dianzi.html

fuzhuang.html

 <!DOCTYPE html>

 <html lang="en">

 <head>

     <meta charset="UTF-8">

     <title>服装</title>

     <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

 </head>

 <body>

 <form id="fuz">

     <input type="checkbox" name="fz" value="服装1"/>服装1

     <input type="checkbox" name="fz" value="服装2"/>服装2

     <input type="checkbox" name="fz" value="服装3"/>服装3

     <input type="checkbox" name="fz" value="服装4"/>服装4

     <input type="button" value="添加" id="add-btn"/>

     <input type="button" value="查看购物车"/>

 </form>

 <a href="index.html">回到首页</a>

 <script>

     $("#add-btn").click(function () {

         var d=$("#fuz").serialize();

         $.post("addList",d,function (data) {

          alert(data.status);

         });

     });

 </script>

 </body>

 </html>

dianzi.html

 <!DOCTYPE html>

 <html lang="en">

 <head>

     <meta charset="UTF-8">

     <title>电子</title>

     <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

 </head>

 <body>

 <form id="dzs">

     <input type="checkbox" name="dz" value="电子1">电子1

     <input type="checkbox" name="dz" value="电子2">电子2

     <input type="checkbox" name="dz" value="电子3">电子3

     <input type="checkbox" name="dz" value="电子4">电子4

     <input type="button" value="添加" id="add-btn">

     <input type="button" value="查看购物车">

 </form>

 <a href="index.html">回到首页</a>

 <script>

     $("#add-btn").click(function () {

         var d=$("#dzs").serialize();

         $.post("addList",d,function (data) {

             alert(data.status);

         });

     });

 </script>

 </body>

 </html>

shipin.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>食品</title>

    <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

</head>

<body>

<form id="sps">

    <input type="checkbox" name="sp" value="食品1">食品1

    <input type="checkbox" name="sp" value="食品2">食品2

    <input type="checkbox" name="sp" value="食品3">食品3

    <input type="checkbox" name="sp" value="食品4">食品4

    <input type="button" value="添加" id="add-btn">

    <input type="button" value="查看购物车">

</form>

<a href="index.html">回到首页</a>

<script>

    $("#add-btn").click(function () {

        var d=$("#sps").serialize();

        $.ajax({url:"addList",

            type:"post",

            data:d,

            success:function (data) {

             alert(data.status)

        }});

    });

</script>

</body>

</html>

Servlet中两个页面
Addlist.java

 package control;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import javax.servlet.http.HttpSession;

 import java.io.IOException;

 import java.io.PrintWriter;

 import java.util.ArrayList;

 import java.util.List;

 @WebServlet("/addList")

 public class AddList extends HttpServlet {

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

         request.setCharacterEncoding("utf-8");

         String[] goods=request.getParameterValues("fz");

         String[] goods1=request.getParameterValues("dz");

         String[] goods2=request.getParameterValues("sp");

         HttpSession session=request.getSession();

         List<String> listgoods=(List<String>) session.getAttribute("goods");

         if (listgoods==null){

             listgoods=new ArrayList<>();

             session.setAttribute("goods",listgoods);

         }

         if(goods!=null){for (String s:goods){

             System.out.println(s+"   ");

             listgoods.add(s);

         }}

         if(goods1!=null){for (String s:goods1){

             System.out.println(s+"   ");

             listgoods.add(s);

         }}

         if(goods2!=null){for (String s:goods2){

             System.out.println(s+"   ");

             listgoods.add(s);

         }}

         response.setCharacterEncoding("utf-8");

         response.setContentType("application/json;charset=utf-8");

         PrintWriter out=response.getWriter();

         out.write("{\"status\":\"添加成功\"}");

         out.close();

     }

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

     }

 }

Getgoods.java

 package control;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import javax.servlet.http.HttpSession;

 import java.io.IOException;

 import java.io.PrintWriter;

 import java.util.List;

 @WebServlet("/getgoods")

 public class Getgoods extends HttpServlet {

     @Override

     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

         HttpSession session=req.getSession();

         List<String> goods=(List<String>) session.getAttribute("goods");

         resp.setContentType("application/json;charset=utf-8");

         PrintWriter out=resp.getWriter();

         if (goods==null){

             out.write("{\"goods\":"+null+"}");

         }else{

             Object[] arr=goods.toArray();

             String s="{\"goods\":[";

             for (int i=0;i<arr.length;i++){

                 s+="\""+arr[i]+"\"";

                 if (i<arr.length-1)

                     s+=",";

             }

             s+="]}";

             System.out.println(s);

             out.write(s);

     }

     out.close();

     }

 }

巴特西

会话管理 session实现多页面传输数据

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