Java SpringMVC：使用bean列表提交多行表单

我读了一些参考资料 试着重复一遍。首先，我用对象的属性列表创建包装器类。我把数据放在包装器对象中，把包装器对象放在我的get控制器模型中，你能看看我的代码吗：

//============================================================

public class PupilsPerformanceWrapper {

public List<JournalOfPupilsperformanceInLesson> listOfPerformances;

//constructor and methods get and set and method addPupilPerformance

}

public class PupilsPerformanceController {
    @RequestMapping(value = "/pupilsperformance_in_lesson/lessonId={id}", method = RequestMethod.GET)
    public ModelAndView showForm (@PathVariable("id") UUID LessonJournalId, Model model) {


final JournalOfLessonRepository LessonJournalRepo = appContext.getBean(JournalOfLessonRepository.class);
final JournalOfLesson journalOfLesson = LessonJournalRepo.findById(LessonJournalId).get();


final var it = Repo.findByLesson(journalOfLesson);

PupilsPerformanceWrapper pupilPerformanceWrapper = new PupilsPerformanceWrapper();
it.forEach(e -> pupilPerformanceWrapper.addPupilPerformance(e));

model.addAttribute("pupilPerformanceWrapper", pupilPerformanceWrapper);
final ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("JournalOfPupilsperformanceInLesson/PerformanceList");
return modelAndView;
}
}

//======================================================================== HTML文件

<form th:object = "${pupilPerformanceWrapper}">
<div th:each="pupilPerf, stat: *{listOfPerformances}" >
     <input type="hidden" th:field="*{listOfPerformances[__${stat.index}__].mark1}" value="${pupilPerf.mark1}"/>
</div>
</form>     

//========================================================================

public class PupilsPerformanceWrapper {

public List<JournalOfPupilsperformanceInLesson> listOfPerformances;

//constructor and methods get and set and method addPupilPerformance

}

public class PupilsPerformanceController {
    @RequestMapping(value = "/pupilsperformance_in_lesson/lessonId={id}", method = RequestMethod.GET)
    public ModelAndView showForm (@PathVariable("id") UUID LessonJournalId, Model model) {


final JournalOfLessonRepository LessonJournalRepo = appContext.getBean(JournalOfLessonRepository.class);
final JournalOfLesson journalOfLesson = LessonJournalRepo.findById(LessonJournalId).get();


final var it = Repo.findByLesson(journalOfLesson);

PupilsPerformanceWrapper pupilPerformanceWrapper = new PupilsPerformanceWrapper();
it.forEach(e -> pupilPerformanceWrapper.addPupilPerformance(e));

model.addAttribute("pupilPerformanceWrapper", pupilPerformanceWrapper);
final ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("JournalOfPupilsperformanceInLesson/PerformanceList");
return modelAndView;
}
}

错误：bean类的无效属性“listOfPerformances[0]” [PupilsPerformanceWrapper]：Bean属性“listOfPerformances[0]”为 不可读或具有无效的getter方法：的返回类型 getter是否与setter的参数类型匹配

---

有什么问题吗？

您应该编写pupilPerf.mark1，而不是编写性能列表[index].mark1。 您无法在teymeleaf中获得此类迭代中的性能列表[index]。请参阅：