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package com.MarissaMan.Servlet;

import java.io.IOException;

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 com.MarissaMan.beans.ShoppingCart;

/**

• Servlet implementation class AddToCartServlet
  */
  @WebServlet("/addToCart")
  public class AddToCartServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;

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

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

   String bookName= request.getParameter("id");
   int price = Integer.parseInt(request.getParameter("price"));
   
   HttpSession session = request.getSession();
   ShoppingCart sCart = (ShoppingCart)session.getAttribute("sCart");
   
   if(sCart == null ){
       sCart = new ShoppingCart();
       session.setAttribute("sCart", sCart);
   }
   
   sCart.addToCart(bookName, price);
   
   StringBuilder result = new StringBuilder();
   result.append("{")
   .append("\"bookName\":\"" + bookName + "\"")
   .append(",")
   .append("\"totalBookNumber\":" + sCart.getTotalBookNumber())
   .append(",")
   .append("\"totalMoney\":" + sCart.getTotalMoney())
   .append("}");
   
   response.setContentType("text/javascript; charset=UTF-8");
   response.getWriter().print(result.toString());
  

  }

}

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>

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Java
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Oracle
加入购物车




Struts2
加入购物车

---

package com.MarissaMan.Servlet;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**

• Servlet implementation class ValiateUserNameServlet
  */
  @WebServlet("/valiateUserName")
  public class ValiateUserNameServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;

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

   List userNames = Arrays.asList("userName");
   String userName = request.getParameter("userName");
   String result = null;
   if(userNames.contains(userName)){
       result = "used";
   } else {
       result = "unused";
   }
   
   response.setContentType("text/html; charset=UTF-8");
   response.setCharacterEncoding("UTF-8");
   response.getWriter().print(result);
  

  }

}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>

    UserName: