小程序网上商城，我的毕业设计，类似京东

package com.hdzz.web; 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 com.hdzz.service.MarketService; import com.hdzz.service.ShopService; /** * Servlet implementation class ShopService */ @WebServlet("/ShopService") public class ShopServlet extends HttpServlet { private static final long serialVersionUID = 1L; private ShopService ms = new ShopService(); /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String state = request.getParameter("state"); if(state.equals("getAdd")) { //查询购物车添加信息（传一个id）。http://localhost:8080/market/shop?state=getAdd&3 this.getAdd(request,response); }else if(state.equals("getDelete")){ this.getDelete(request, response); //删除购物车商品(传要 删除的id)。http://localhost:8080/market/shop?state=getDelete&1 }else if(state.equals("getAlter")){ this.getAlter(request, response); //(传一个优惠卷面值和对应的id)http://localhost:8080/market/shop?state=getAlter&20&1 }else if(state.equals("getSearch")){ this.getSearch(request, response); //查询购物车商品。http://localhost:8080/market/shop?state=getSearch } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void getAdd(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /** 设置后台跨域 */ response.setContentType("text/html;charset=utf-8"); response.setHeader("Access-Control-Allow-Origin", "*"); //获取url后面所带的参数得到的是个字符串 String value=request.getQueryString(); // 将url后面的字符串按指定字符转化成数组 String[] valueArray = value.split("&"); // for (String values : valueArray) { // System.out.println(values); // } System.out.println(valueArray[1]); //将url中取出的数据将格式转为中文 String id=java.net.URLDecoder.decode(valueArray[1],"UTF-8"); String returnJson = ms.getAddByJson(id); response.getWriter().print(returnJson); // response.getOutputStream().write((returnJson).getBytes()); } protected void getDelete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /** 设置后台跨域 */ response.setContentType("text/html;charset=utf-8"); response.setHeader("Access-Control-Allow-Origin", "*"); //获取url后面所带的参数得到的是个字符串 String value=request.getQueryString(); // 将url后面的字符串按指定字符转化成数组 String[] valueArray = value.split("&"); // for (String values : valueArray) { // System.out.println(values); // } System.out.println(valueArray[1]); //将url中取出的数据将格式转为中文 String id=java.net.URLDecoder.decode(valueArray[1],"UTF-8"); String returnJson = ms.getDeleteByJson(id); response.getWriter().print(returnJson); // response.getOutputStream().write((returnJson).getBytes()); } protected void getAlter(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /** 设置后台跨域 */ response.setContentType("text/html;charset=utf-8"); response.setHeader("Access-Control-Allow-Origin", "*"); //获取url后面所带的参数得到的是个字符串 String value=request.getQueryString(); // 将url后面的字符串按指定字符转化成数组 String[] valueArray = value.split("&"); // for (String values : valueArray) { // System.out.println(values); // } System.out.println(valueArray[1]); //将url中取出的数据将格式转为中文 String id=java.net.URLDecoder.decode(valueArray[1],"UTF-8"); String price=java.net.URLDecoder.decode(valueArray[2],"UTF-8"); String returnJson = ms.getAlterByJson(price,id); response.getWriter().print(returnJson); // response.getOutputStream().write((returnJson).getBytes()); } protected void getSearch(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /** 设置后台跨域 */ response.setContentType("text/html;charset=utf-8"); response.setHeader("Access-Control-Allow-Origin", "*"); String returnJson = ms.getSearchByJson(); response.getWriter().print(returnJson); // response.getOutputStream().write((returnJson).getBytes()); } }