@RequestMapping("/askforleaveList") public String askforleaveList(Model model, HttpSession session) { Student student = (Student) session.getAttribute("loginUserinfo"); LambdaQueryWrapper<Vacate> vacateLambdaQueryWrapper = new LambdaQueryWrapper<>(); vacateLambdaQueryWrapper.eq(Vacate::getStuNum,student.getStudentNumber()); List<Vacate> vacates = vacateService.list(vacateLambdaQueryWrapper); SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd HH:mm"); vacates.forEach(vacate -> { String format = sdf1.format(vacate.getCreatTime()); String format1 = sdf1.format(vacate.getStartTime()); String format2 = sdf1.format(vacate.getEndTime()); vacate.setCreatTimeStr(format); vacate.setStartTimeStr(format1); vacate.setEndTimeStr(format2); }); model.addAttribute("askforleaveList", vacates); return "askforleaveList"; }请详细解释每一行代码

02@RequestMapping映射.md

SpringMVC model和session

public String login(User user, Model model) { // 验证用户并登录 model.addAttribute("user", user); return "success"; } @RequestMapping("/protectedPage") public String protectedPage(@...

Spring MVC之@RequestMapping注解详解

public Map<String, Appointment> getForDay(@PathVariable Date day) { // ... } 在这个例子中，{day}是一个变量，实际请求如/appointments/2022-06-07将被映射到这个方法。 2. **method**：用于...

@RequestMapping("/repairList") public String repairList(Model model, HttpSession session) { Student student = (Student) session.getAttribute("loginUserinfo"); LambdaQueryWrapper<Repair> repairLambdaQueryWrapper = new LambdaQueryWrapper<>(); repairLambdaQueryWrapper.eq(Repair::getStuNum,student.getStudentNumber()); List<Repair> repairList1 = repairList.list(repairLambdaQueryWrapper); SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd HH:mm"); repairList1.forEach(repair -> { String format = sdf1.format(repair.getCreateTime()); repair.setCreateTimeStr(format); }); model.addAttribute("repairList", repairList1); return "repairList"; }请详细解释每一行代码

3. Student student = (Student) session.getAttribute("loginUserinfo"); 这行代码从 Session 中获取名为 "loginUserinfo" 的属性，并将其强制转换为 Student 类型。这里假设在登录时将 Student 对象存入了 ...

// 添加 @RequestMapping("/debook/add.html") public String addDebookHtml(Model model, HttpSession session) { List<Category> categoryList = categoryService.selectAll(); model.addAttribute("categoryList", categoryList); return "/admin/debook_add"; } @ResponseBody @RequestMapping("/debook/add") public Map<String, Object> addDebook(@RequestBody Debook debook, HttpSession session) { User user = (User) session.getAttribute(WebConstant.SESSION_KEY_USER); debook.setUserId(user.getId()); debook.setUsername(user.getUsername()); debook.setDebookTime(new Date()); debookService.insertSelective(debook); return new ResponseBean().getResponseMap(); }

在方法中，都使用了Model对象和HttpSession对象。在addDebookHtml方法中，从数据库中获取所有的Category对象列表，并将它们添加到Model对象中，最后返回一个指定路径为"/admin/debook_add"的字符串，表示要渲染该...

@RequestMapping("/debook/add.html") public String addDebookHtml(Model model, HttpSession session) { List<Category> categoryList = categoryService.selectAll(); model.addAttribute("categoryList", categoryList); return "/admin/debook_add"; } @ResponseBody @RequestMapping("/debook/add") public Map<String, Object> addDebook(@RequestBody Debook debook, HttpSession session) { User user = (User) session.getAttribute(WebConstant.SESSION_KEY_USER); debook.setUserId(user.getId()); debook.setUsername(user.getUsername()); debook.setDebookTime(new Date()); debookService.insertSelective(debook); return new ResponseBean().getResponseMap(); }

这是一个使用Spring MVC框架的Java Web项目中的两个请求处理方法。第一个方法 @RequestMapping("/debook/add.html") 用于处理 GET 请求，返回一个...此外，该方法还使用了 HttpSession 对象，用于获取当前用户信息。

@RequestMapping("/stayoutlateList") public String stayoutlateList(Model model, HttpSession session) { Student student = (Student) session.getAttribute("loginUserinfo"); LambdaQueryWrapper<StayOutLate> stayOutLateLambdaQueryWrapper = new LambdaQueryWrapper<>(); stayOutLateLambdaQueryWrapper.eq(StayOutLate::getStuNum,student.getStudentNumber()); List<StayOutLate> stayOutLates = stayOutLateService.list(stayOutLateLambdaQueryWrapper); SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd HH:mm"); stayOutLates.forEach(stayOutLate -> { String format = sdf1.format(stayOutLate.getCreatTime()); String format1 = sdf1.format(stayOutLate.getStayTime()); stayOutLate.setCreatTimeStr(format); stayOutLate.setStayTimeStr(format1); }); model.addAttribute("stayoutlateList", stayOutLates); return "stayoutlateList"; }请详细解释每一行代码

3. Student student = (Student) session.getAttribute("loginUserinfo");: 从 HttpSession 对象中获取名为 loginUserinfo 的属性值，并将其转换为 Student 对象。 4. LambdaQueryWrapper<StayOutLate> ...

@RequestMapping("/myDataList") public String myDataList(Model model, HttpSession session) { //判断是否登陆 if (session.getAttribute("loginUserinfo") == null) { model.addAttribute("errorMsg", "登陆以后才可以操作"); return "/"; } Student student = (Student) session.getAttribute("loginUserinfo"); if (ObjectUtils.isNotEmpty(student.getDormitoryId())) { LambdaQueryWrapper<Student> studentLambdaQueryWrapper = new LambdaQueryWrapper<>(); studentLambdaQueryWrapper.eq(Student::getDormitoryId, student.getDormitoryId()); List<Student> studentList = studentService.list(studentLambdaQueryWrapper); Dormitory dormitory = dormitoryService.getById(student.getDormitoryId()); List<String> stringList = studentList.stream().map(Student::getName).collect(Collectors.toList()); String[] ans2 = stringList.toArray(new String[stringList.size()]); dormitory.setDormUser(String.join(",",ans2)); session.setAttribute("dormUserinfoList", studentList); model.addAttribute("dorminfo", dormitory); } return "myDataList"; }请详细解释每一行代码

Student student = (Student) session.getAttribute("loginUserinfo"); 从Session中获取已登录的学生信息。 if (ObjectUtils.isNotEmpty(student.getDormitoryId())) { LambdaQueryWrapper<Student> ...

@RequestMapping("/login") public String login(@RequestBody User user, @RequestParam String checkCode, HttpServletRequest request) throws IOException { HttpSession session = request.getSession(); String checkCodeGen = (String) session.getAttribute("checkCodeGen"); if (checkCodeGen.equalsIgnoreCase(checkCode)){ User result = userService.login(user.getUserName(), user.getPassword()); if (result != null){ session.setAttribute("userName",result.getUserName()); return "success" ; } }else{ return "验证码错误"; } return "用户名或密码错误"; } @RequestMapping("/checkCode") public void checkCode(HttpServletRequest request, HttpServletResponse response) throws IOException { String checkCodeGen = CheckCodeUtil.generateVerifyCode(4); HttpSession session = request.getSession(); session.setAttribute("checkCodeGen",checkCodeGen); System.out.println(session.getId()); ServletOutputStream os = response.getOutputStream(); CheckCodeUtil.outputImage(100,40,os,checkCodeGen); } @RequestMapping("/checkLogin") public String checkLogin(HttpSession session){ return (String)session.getAttribute("userName"); } @RequestMapping("/logout") public String logout(HttpSession session){ session.setAttribute("userName",null); return "success"; }

- @RequestMapping是一个注解，用于映射请求的URL路径和Controller方法。 - @RequestBody注解用于将request请求的body部分转换成Java对象，并且可以通过@RequestParam注解获取请求参数。 - HttpSession是一个接口，...

@RequiredArgsConstructor @Controller public class LoginController { private final LoginService loginService; @RequestMapping(value = "/login",method = RequestMethod.POST) //插入数据 public String login(String username, String password, String vercode, String role, HttpSession session, Model model) { return loginService.login(username,password,vercode,role,session,model); } @RequestMapping("/loginOut") public String loginOut(HttpSession session) { session.invalidate(); return "redirect:/"; } }请详细解释每一行代码

public String login(String username, String password, String vercode, String role, HttpSession session, Model model) { return loginService.login(username,password,vercode,role,session,model); } ...

package com.controller; import java.text.SimpleDateFormat; import java.util.Date; import javax.servlet.http.HttpSession; import javax.validation.Valid; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import com.bean.Orders; import com.bean.OrderRecord; import com.services.OrdersServices; @Controller public class OrdersController { @Autowired private OrdersServices OrdersServices; @RequestMapping("/addOrders") public String addOrders(Orders Orders,HttpSession session,OrderRecord OrderRecord) { return OrdersServices.addOrders(Orders,session,OrderRecord); } @RequestMapping("/deleteOrdersByID") public String deleteOrdersByID(int oid,Model model,HttpSession session) { return OrdersServices.deleteOrdersByID(oid, model,session); } @RequestMapping("/selectOrdersByPid") public String selectOrdersByPid(Model model,HttpSession session) { return OrdersServices.selectOrdersByPid( model,session); } }

这是一个基于Spring框架开发的订单控制器。包含了添加订单、根据订单ID删除订单、根据商品ID查询订单等功能。其中使用了@Autowired注解注入了OrdersServices...同时，也使用了HttpSession来存储和获取当前用户的信息。

@RequestMapping("/addUser") public ModelAndView addUser(String userName,String passWord,String gender,String email,String phone,String address){ User user = new User(); user.setUname(userName); user.setPassword(passWord); user.setGender(gender); user.setEmail(email); user.setPhone(phone); user.setAdress(address); userService.addUser(user); return new ModelAndView("redirect:/manaUser.do"); } @RequestMapping("/updateUserPage") public String updateUserPage(Model model,HttpSession session){ User sessionUser= (User) session.getAttribute("user"); User user=userService.findUserById(sessionUser.getUid()); model.addAttribute("user",user); return "front/update"; } @RequestMapping("/updateUser") public ModelAndView updateUser(Integer uid,String uname,String gender,String email,String phone,String address){ User user=new User(); user.setUid(uid); user.setUname(uname); user.setGender(gender); user.setEmail(email); user.setPhone(phone); user.setAdress(address); userService.userModify(user); return new ModelAndView("redirect:/index.do"); }解释这段代码

2. "/updateUserPage"：用于跳转到用户信息修改页面，接收一个Model对象和一个HttpSession对象，从session中获取当前用户的id，通过userService的findUserById方法获取该用户的信息，将这些信息封装成一个User对象，...

@RequestMapping("login") public String login(@Nullable String refer, Model model, HttpSession session) { if (refer != null) { model.addAttribute("refer",refer); } if (session.getAttribute("user") != null ){ return "redirect:/"; } return "login"; }

Model 参数用于向视图中传递数据，HttpSession 参数用于获取和设置 Session 中的数据。在方法的实现中，首先判断 refer 参数是否为 null，如果不为 null，就将其添加到 Model 中。然后判断 Session 中...

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"; } }

11. model.addAttribute("username",session.getAttribute("username"))、model.addAttribute("orders",orders) 和 model.addAttribute("carts",carts) 表示将 HttpSession 中的属性值存入 Model 对象中，以便...

@RequiredArgsConstructor @Controller public class StudenController { private final StudentService studentService; @ResponseBody @RequestMapping(value = "/updateStudent",method = RequestMethod.POST) public GlobalResult updateUserinfo(HttpSession session, Student student) { if (studentService.updateById(student)){ session.setAttribute("loginUserinfo", student); return GlobalResult.ok("个人信息修改成功"); } return GlobalResult.errorMsg("个人信息修改失败"); } }请详细解释每一行代码

- public GlobalResult updateUserinfo(HttpSession session, Student student) 方法名为 updateUserinfo，声明了两个参数 HttpSession session 和 Student student。 - GlobalResult 是一个自定义的用于...

@RequestMapping("/front/getCode") public void getCode(HttpSession session, HttpServletResponse resp){ // 调用工具类生成的验证码和验证码图片 Map<String, Object> codeMap = CodeUtil.generateCodeAndPic(); session.setAttribute("code", codeMap.get("code").toString()); // 禁止图像缓存。 resp.setHeader("Pragma", "no-cache"); resp.setHeader("Cache-Control", "no-cache"); resp.setDateHeader("Expires", -1); resp.setContentType("image/jpeg"); // 将图像输出到Servlet输出流中。 ServletOutputStream sos; try { sos = resp.getOutputStream(); ImageIO.write((RenderedImage) codeMap.get("codePic"), "jpeg", sos); sos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * 跳转学生注册页

@RequestMapping("/front/doRegister") public String doRegister(Student student, HttpSession session, Model model, String code){ // 判断验证码是否正确 String sessionCode = (String) session.getAttribute...

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@RequestMapping("login") public String login(@Nullable String refer, Model model, HttpSession session) { if (refer != null) { model.addAttribute("refer",refer); } if (session.getAttribute("user") != null ){ return "redirect:/"; } return "login"; }

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