@GetMapping("/shop-cart") public String cartListPage(HttpServletRequest request, HttpSession httpSession) { NewBeeMallUserVO user = (NewBeeMallUserVO) httpSession.getAttribute(Constants.MALL_USER_SESSION_KEY); int itemsTotal = 0; int priceTotal = 0; List<NewBeeMallShoppingCartItemVO> myShoppingCartItems = newBeeMallShoppingCartService.getMyShoppingCartItems(user.getUserId()); if (!CollectionUtils.isEmpty(myShoppingCartItems)) { //购物项总数 itemsTotal = myShoppingCartItems.stream().mapToInt(NewBeeMallShoppingCartItemVO::getGoodsCount).sum(); if (itemsTotal < 1) { NewBeeMallException.fail("购物项不能为空"); } //总价 for (NewBeeMallShoppingCartItemVO newBeeMallShoppingCartItemVO : myShoppingCartItems) { priceTotal += newBeeMallShoppingCartItemVO.getGoodsCount() * newBeeMallShoppingCartItemVO.getSellingPrice(); } if (priceTotal < 1) { NewBeeMallException.fail("购物项价格异常"); } } request.setAttribute("itemsTotal", itemsTotal); request.setAttribute("priceTotal", priceTotal); request.setAttribute("myShoppingCartItems", myShoppingCartItems); return "mall/cart"; }

Spring注解 - 52注解 - 原稿笔记

@ConfigurationProperties , @Controller , @CrossOrigin , @EnableWebMvc , @GetMapping , @Import , @JsonDeserialize , @JsonIgnore , @JsonIgnoreProperties , @JsonIgnoreType , @JsonInclude , @JsonProperty...

帮我改写以下代码，不要用servlet.代码为：@Controller public class CartController { @Autowired private UserService userService; @Autowired private CommodityService commodityService; @Autowired private CartService cartService; @GetMapping("/cart") public String cart(Model model, HttpServletRequest request) { HttpSession session = request.getSession(); User user = (User)session.getAttribute("user"); if (user == null) { return "redirect:/login"; } List<Cart> cartList = cartService.findByUid(user.getUid()); model.addAttribute("cartList", cartList); return "cart"; } @PostMapping("/cart/add") public String addCart(Integer cid, Integer cnum, HttpServletRequest request) { HttpSession session = request.getSession(); User user = (User)session.getAttribute("user"); if (user == null) { return "redirect:/login"; } Commodity commodity = commodityService.findById(cid); if (commodity == null) { return "redirect:/commodity"; } Cart cart = new Cart(); cart.setUid(user.getUid()); cart.setCid(cid); cart.setCnum(cnum); cartService.save(cart); return "redirect:/cart"; } @PostMapping("/cart/delete") public String deleteCart(Integer cartid) { cartService.deleteById(cartid); return "redirect:/cart"; }

public List<Cart> getCart(HttpServletRequest request) { HttpSession session = request.getSession(); User user = (User)session.getAttribute("user"); if (user == null) { return null; } List<Cart>...

这断代码能用getmapping吗@GetMapping("/allAppliance") //接口路径 public String allAppliance(HttpServletRequest request, HttpServletResponse response,HttpSession session) { //查询全部二手家电信息方法 Buyer buyer= (Buyer) session.getAttribute("buyer"); if (buyer== null) {//如果买家没有登录 request.setAttribute("error","请先登陆后再浏览家电");return "login";} List<Appliance>appliances= applianceService.selectallApp(); //调用applianceService中的selectallApp查询全部二手家电信息 request.setAttribute("appliances",appliances); return "applianceby";} //查询成功，返回二手家电信息

public String allAppliance(HttpServletRequest request, HttpServletResponse response, HttpSession session) { Buyer buyer = (Buyer) session.getAttribute("buyer"); if (buyer == null) { request....

@GetMapping("/create/byCart") public String goToOrderConfirmPageByCart(Map<String, Object> map, HttpSession session, HttpServletRequest request, @RequestParam(required = false) Integer[] order_item_list) throws UnsupportedEncodingException { User user = (User) session.getAttribute("USER_SESSION"); Integer userId = (Integer) session.getAttribute("USER_ID"); map.put("user", user); if (order_item_list == null || order_item_list.length == 0) { log.warn("用户订单项数组不存在，回到购物车页"); return "redirect:/order/cart"; }

它接受了Map、HttpSession、HttpServletRequest和@RequestParam作为参数。其中@RequestParam表示在请求中必须提供名为order_item_list的参数，它是一个可选的整数数组。如果order_item_list不存在或为空，则会将用户...

以下代码有问题吗：@GetMapping("/allAppliance") //接口路径 public String allAppliance(HttpServletRequest request, HttpServletResponse response, HttpSession session) {//查询全部二手家电信息方法 try { Buyer buyer = (Buyer) session.getAttribute("buyer"); if (buyer == null) { //如果买家没有登录 request.setAttribute("error", "请先登录后再浏览家电"); return "login"; } List<Appliance> appliances = applianceService.selectAllApp(); request.setAttribute("appliances", appliances); return "applianceby"; } catch (Exception e) { // 处理异常情况 request.setAttribute("error", "浏览二手家电信息时发生错误"); return "error"; }

在代码中，你使用了@GetMapping注解来指定接口的请求方式为GET。你需要确保在实际使用中按照指定的路径发送GET请求来访问该接口。此外，代码中有一处需要注意的地方是在异常处理部分，你使用了catch (Exception...

package com.example.controller; import com.example.domain.Cart; import com.example.domain.Order; import com.example.service.OrderService; import jakarta.servlet.http.HttpServletRequest; import jakarta.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import java.util.List; @Controller @RequestMapping("/orders") public class OrderController { @Autowired private HttpServletRequest request; @Autowired private OrderService orderService; @PostMapping("/order") public String order(@RequestBody List<Cart> carts , Model model){ HttpSession session = request.getSession(); Long userId =(Long)session.getAttribute("userId"); List<Order> orders = orderService.getByUserId(userId); session.setAttribute("orders",orders); session.setAttribute("carts",carts); // model.addAttribute("username",session.getAttribute("username")); // model.addAttribute("orders",orders); // model.addAttribute("carts",carts); return "/order"; } @GetMapping("/order2") public String order2(Model model){ HttpSession session = request.getSession(); model.addAttribute("username",session.getAttribute("username")); model.addAttribute("orders",session.getAttribute("orders")); model.addAttribute("carts",session.getAttribute("carts")); return "/order"; } @GetMapping("/ok") public String ok(){ return "/ok"; } }

7. HttpSession session = request.getSession() 表示获取当前请求的 HttpSession 对象。 8. Long userId =(Long)session.getAttribute("userId") 表示从 HttpSession 中获取 userId 属性值，并将其转换为 Long...

登录验证 AdminPO res = afAdminService.showOne(admin); HttpSession session = request.getSession(); if (res != null){ session.setAttribute("admin",res); } return Result.success(res); @GetMapping("/showOne") Result showOne(String uAccount,String uPassword){ return Result.success(afUserService.showOne(uAccount,uPassword)); } @PostMapping(value = "/login") public Result login(@RequestBody AdminPO admin, HttpServletRequest request){ AdminPO res = afAdminService.showOne(admin); HttpSession session = request.getSession(); if (res != null){ session.setAttribute("admin",res); } return Result.success(res); } @GetMapping("/showAA") public Result showAA(String password,String account){ AdminPO admin = new AdminPO(); admin.setPassword(password); admin.setAccount(account); return Result.success(afAdminService.showOne(admin)); }

如果查询结果不为空，说明验证成功，将管理员对象存储在HttpSession中，然后返回成功的结果。如果查询结果为空，则表示验证失败，返回空的结果。在showOne方法中，通过调用afUserService.showOne(uAccount, ...

spring-redis-session 自定义 key 和过期时间

public String sessionId(){ HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest(); HttpSession session = request.getSession(); session....

使用HttpSession解决Ajax请求后重定向问题

public String index() { // 将数据存入session HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest(); HttpSession session = request....

解释如下代码： @GetMapping("/login") public String toLogin(){ return "login"; } @PostMapping("/login") @ResponseBody public String login(@RequestParam("username")String username, @RequestParam("password")String password, @RequestParam("remember")String remember, HttpServletRequest request, HttpServletResponse response) throws JsonProcessingException { String password_back = password; User login = userService.login(username, password); if (login!=null){ login.setLastTime(new Date()); userService.updateUser(login); HttpSession session = request.getSession(); session.setAttribute("loginUser",username); session.setAttribute("isAdmin",login.getAdmin()); User user = userService.findUserByUname(username).get(0); session.setAttribute("localUser",user); if (remember.equals("true")){ Cookie ucookie = new Cookie("unameCookie",username); Cookie pcookie = new Cookie("passwdCookie",password_back); ucookie.setMaxAge(243600); //cookies 保存一天 pcookie.setMaxAge(243600); response.addCookie(ucookie); response.addCookie(pcookie); } if ("true".equals(login.getAdmin())){ return "2"; //管理员登录返回2 } return "1"; // 普通登陆，返回1 } return "0"; // 失败，返回0.用户名或密码错误 }

这段代码是一个 Spring Boot 的 Controller 类，其中包含两个请求处理方法：toLogin 和 login。toLogin 方法处理 GET 请求，返回一个名为 "login...如果查询不到 User 对象，则表示验证失败，返回字符串 "0" 给浏览器。

@GetMapping(value = "/out", produces = MediaType.APPLICATION_JSON_UTF8_VALUE) private void loginOutnew(HttpSession httpSession, HttpServletResponse response, HttpServletRequest request) throws IOException { String score = "1"; String userInfo = httpSession.getAttribute("userInfo") == null ? null : httpSession.getAttribute("userInfo").toString(); log.info("正在登出"); if (userInfo != null) { log.info(userInfo); JSONObject resultJson = (JSONObject) JSONObject.parse(userInfo); String userType = resultJson.getString("userType"); score = StringUtils.equals("0", userType) ? "1" : "2"; Enumeration<String> attributeNames = httpSession.getAttributeNames(); while (attributeNames.hasMoreElements()) { request.getSession().removeAttribute(attributeNames.nextElement()); } // 2.清除session request.getSession().invalidate(); log.info("清除缓存成功"); } String url = outUrl + "?score=" + score + "&returnUrl=" + loginurl; response.sendRedirect(url); }

方法接收 HttpSession、HttpServletResponse 和 HttpServletRequest 三个参数，分别表示当前会话、响应对象和请求对象。方法通过 HttpSession 的 getAttribute 方法获取名为 "userInfo" 的属性值，并根据该属性值中...

@GetMapping("/order2") public String order2(Model model){ HttpSession session = request.getSession(); model.addAttribute("username",session.getAttribute("username")); model.addAttribute("orders",session.getAttribute("orders")); model.addAttribute("carts",session.getAttribute("carts")); return "/order"; }

具体来说，该方法使用了 @GetMapping("/order2") 注解，表示它可以处理 GET 请求方式的 "/order2" 请求。方法中使用了 @Autowired private HttpServletRequest request; 注入，其中的 HttpServletRequest request ...

@Controller public class StudentControl { @Resource private StudentService studentService; @GetMapping("/checkCode") public void checkCode(HttpServletRequest req, HttpServletResponse resp){ try { Object[] code = CodePicture.createImage(); HttpSession session = req.getSession(); session.setAttribute("checkCode", code[0]); ImageIO.write((RenderedImage) code[1], "jpg", resp.getOutputStream()); System.out.println("checkcode.."); } catch (Exception e) { e.printStackTrace(); } }

该控制器中包含了一个用于生成验证码图片的方法checkCode，该方法接收HttpServletRequest和HttpServletResponse两个参数。在方法中，首先通过调用CodePicture.createImage()方法来生成验证码图片，然后将验证码的值...

加了@Mapping如果形参中有HttpSession会自动装配吗

在Spring框架中，@Autowired注解通常用于自动装配依赖项，包括从HttpServletRequest或HttpSession等请求上下文中注入对象。如果你在使用Spring Data REST的@RepositoryRestResource或类似的@Mapping注解...

运用ServletContext, 统计网站访问次数再运用HttpServletResponse与HttpServletRequest，实现用户登录验证运用HttpSession，实现登录合法的用户，在后续浏览链接的页面都显示输出该用户名,并提供退出功能。运用Java语言编写

在Java中，我们可以结合ServletContext, ... public String logout(HttpServletRequest request) { HttpSession session = request.getSession(); session.invalidate(); return "redirect:/"; }

后端将httpsession保存后前端怎么获取

public void saveData(@RequestBody MyData data, HttpServletRequest request) { HttpSession session = request.getSession(); session.setAttribute("myData", data); } @GetMapping("/getData") public ...

请根据user（uid,uname,upwd）,commodity(cid,cname,cprice,cinventory),cart(cartid,cid,uid,cnum)三个表使用springboot帮我实现购物车功能，包括entity，service、controller、html、repository相关文件和完整代码

public String cart(Model model, HttpServletRequest request) { HttpSession session = request.getSession(); User user = (User)session.getAttribute("user"); if (user == null) { return "redirect:/...

6. 怎样在Controller方法里面得到Request,或者Session？

public String myMethod(HttpServletRequest request, HttpSession session) { // 使用request对象和session对象进行操作 // ... return "myView"; } } 在上面的代码中，myMethod 方法声明了 ...

请写一个调用微信auth.code2Session方法后与自定义登录态关联的使用Spring Security 框架完整实例的springboot微信小程序项目，请注意项目需要引入<artifactId>weixin-java-miniapp</artifactId>

public void doLogin(HttpServletRequest request, HttpServletResponse response, String username, String password) throws IOException { Authentication authentication = new ...

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Spring注解 - 52注解 - 原稿笔记

spring-redis-session 自定义 key 和过期时间

使用HttpSession解决Ajax请求后重定向问题

加了@Mapping如果形参中有HttpSession会自动装配吗

运用ServletContext, 统计网站访问次数再运用HttpServletResponse与HttpServletRequest，实现用户登录验证运用HttpSession，实现登录合法的用户，在后续浏览链接的页面都显示输出该用户名,并提供退出功能。运用Java语言编写

后端将httpsession保存后前端怎么获取

请根据user（uid,uname,upwd）,commodity(cid,cname,cprice,cinventory),cart(cartid,cid,uid,cnum)三个表使用springboot帮我实现购物车功能，包括entity，service、controller、html、repository相关文件和完整代码

6. 怎样在Controller方法里面得到Request,或者Session？

请写一个调用微信auth.code2Session方法后与自定义登录态关联的使用Spring Security 框架完整实例的springboot微信小程序项目，请注意项目需要引入<artifactId>weixin-java-miniapp</artifactId>

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