从表单提交时，DateTimeFormat批注不适用于“hh:mm”

Question

所以首先，当我使用@DateTimeFormat（模式="HH： mm"）时，这段代码是有效的。但是一旦我将其更改为@DateTimeFormat（模式="hh： mm"）它就停止工作。我是新来的，所以我不确定问题会从哪里来。我想做的就是为我的数据库节省时间。

错误是：

Failed to convert from type [java.lang.String] to type [@org.springframework.format.annotation.DateTimeFormat java.time.LocalTime] for value '12:00';

这是我映射到表单的对象：

@Entity
@Table(name = "Schedule")
@NoArgsConstructor
@Getter
@Setter
public class Schedule {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    @DateTimeFormat(pattern = "hh:mm")
    private LocalTime startTime;
    @DateTimeFormat(pattern = "hh:mm")
    private LocalTime endTime;
    @Column(name = "days")
    private String days;

    public Schedule(LocalTime startTime, LocalTime endTime, String days) {
        this.startTime = startTime;
        this.endTime = endTime;
        this.days = days;
    }
}

这是我的控制器：

@Controller
@RequestMapping("/schedules")
@AllArgsConstructor
public class WebScheduleController {
    
    ScheduleService scheduleService;

    @GetMapping
    public String getSchedules(Model model) {
        List<Schedule> schedules = scheduleService.getSchedules();
        model.addAttribute("scheduleList", schedules);
        model.addAttribute("schedule", new Schedule());
        return "schedules";
    }

    @PostMapping
    public String createSchedule(@ModelAttribute("schedule") Schedule schedule,Model model ){

        scheduleService.createSchedule(schedule);

        return "redirect:/schedules/";
    }
    

}

这是超文本标记语言形式：

<form method="post" th:action="@{/schedules}" th:object="${schedule}" class="col card p-3 mb-5">
    <div class="form-group">
        <label for="startTime">Start time</label>
        <input id="startTime" placeholder="Enter start time" required type="time" th:field="*{startTime}"/>
    </div>
    <div class="form-group">
        <label for="endTime">End time</label>
        <input id="endTime" placeholder="Enter end time" required type="time" th:field="*{endTime}" />
    </div>
    <div class="form-group">
        <label for="days">Days</label>
        <input id="days" placeholder="Enter days" required type="text" th:field="*{days}" />
    </div>
    <input type="submit" class="btn btn-primary" value="Create Schedule">
</form>

Answer 1

您是否尝试删除am/pm？也许这个字符串am/pm也试图在发送数据时成为时间的一部分。数据库不允许在日期中使用字符串。