4.17

已经花费的时间3天，还剩余的时间7天

实现阅卷管理系统的开发
// 成绩批改页面
@GetMapping("/grading")
public String gradingManagement(Model model) {
model.addAttribute("submissions", adminService.getAllSubmissions());
return "admin/grading";
}

// 处理成绩提交
@PostMapping("/grade")
public String processGrading(@RequestParam Integer submissionId,
@RequestParam String score,
RedirectAttributes ra) {
adminService.gradeSubmission(submissionId, score);
ra.addFlashAttribute("message", "成绩提交成功");
return "redirect:/admin/grading";
}