日期被覆盖（Spring/Hibernate）
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【中文标题】日期被覆盖（Spring/Hibernate）【英文标题】：Date gets overwritten (Spring/Hibernate) 【发布时间】：2016-07-16 02:19:59 【问题描述】：现在，我的主页上有一个“预订”表格，其中显示了有关不同预订的信息。其中一个字段是“预订日期”，它显示了创建预订的日期和时间。但是当我编辑预订时，它会自动被新日期覆盖。如何防止这种情况发生？
我的预订舱位
@Entity
@Table(name="booking")
public class Booking
@Id
@Column(name="id")
@GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
@ManyToOne
@JoinColumn(name="R_id")
private Restaurant restaurant;
@Column(name="date")
@Temporal(TemporalType.DATE)
private Date date;
@Column(name="start")
private String start;
@Column(name="duration")
private float duration;
@Column(name="amount_of_people")
private int amountOfPeople;
@Column(name="name")
private String name;
@Column(name="contact_preference")
private String contactPreference;
@Column(name="phone_number")
private String phoneNumber;
@Column(name="comments")
private String comments;
// Date that gets overwritten
@Column(name="current_datetime")
@Type(type="timestamp")
private Date currentDatetime;
@Column(name="new_date")
@Type(type="timestamp")
private Date newDate;
public Long getId()
return id;
public void setId(Long id)
this.id = id;
public Restaurant getRestaurant()
return restaurant;
public void setRestaurant(Restaurant restaurant)
this.restaurant = restaurant;
public Date getDate()
return date;
public void setDate(Date date)
this.date = date;
public String getStart()
return start;
public void setStart(String start) this.start = start;
public float getDuration()
return duration;
public void setDuration(float duration)
this.duration = duration;
public int getAmountOfPeople()
return amountOfPeople;
public void setAmountOfPeople(int amountOfPeople)
this.amountOfPeople = amountOfPeople;
public String getName()
return name;
public void setName(String name)
this.name = name;
public String getContactPreference()
return contactPreference;
public void setContactPreference(String contactPreference)
this.contactPreference = contactPreference;
public String getPhoneNumber() return phoneNumber;
public void setPhoneNumber(String phoneNumber) this.phoneNumber = phoneNumber;
public String getComments()
return comments;
public void setComments(String comments)
this.comments = comments;
public Date getCurrentDatetime()
return currentDatetime;
public void setCurrentDatetime(Date currentDatetime) this.currentDatetime = currentDatetime;
public Date getNewDate() return newDate;
public void setNewDate(Date newDate) this.newDate = newDate;
// Comparator
public static class BookingDateComparator implements Comparator<Booking>
@Override
public int compare(Booking booking1, Booking booking2)
if (booking1.getDate().compareTo(booking2.getDate()) == 0)
return booking1.getStart().compareTo(booking2.getStart());
return booking1.getDate().compareTo(booking2.getDate());
我的 MainController 类中的相关方法：
@RequestMapping(value = "bookings", method = RequestMethod.GET)
public String bookings(Model model)
List<Booking> bookingList = bookingService.getBookings();
model.addAttribute("bookings", bookingList);
initModelList(model);
return "bookings";
@RequestMapping(value = "booking/create", method = RequestMethod.GET)
public String createBooking(Model model)
model.addAttribute("booking", new Booking());
initModelList(model);
return "newBooking";
@RequestMapping(value = "booking/create", method = RequestMethod.POST)
public String createBookingAction(@Valid @ModelAttribute ("booking") Booking booking, BindingResult result, Model model)
BookingFormValidator bookingFormValidator = new BookingFormValidator();
bookingFormValidator.validate(booking, result);
if (result.hasErrors())
initModelList(model);
return "newBooking";
bookingService.addBooking(booking);
return "redirect:/bookings";
@RequestMapping(value = "booking/edit/id", method = RequestMethod.GET)
public String editBooking(@PathVariable Long id, Model model)
initModelList(model);
Booking booking = bookingService.getBooking(id);
model.addAttribute("booking", booking);
return "editBooking";
@RequestMapping(value = "booking/edit/id", method = RequestMethod.POST)
public String editBookingAction(@Valid @ModelAttribute ("booking") Booking booking, BindingResult result, Model model)
BookingFormValidator bookingFormValidator = new BookingFormValidator();
bookingFormValidator.validate(booking, result);
if (result.hasErrors())
initModelList(model);
return "editBooking";
bookingService.updateBooking(booking);
return "redirect:/bookings";
我的主页的.jsp
<body>
<jsp:include page="../fragments/menu.jsp"/>
<div id="body">
<section class="content-wrapper main-content clear-fix">
<h2>List of bookings</h2>
<p>
<a href="/restaurant/create">Add restaurant</a>
<a href="/booking/create">Create New Booking</a>
</p>
<table class="">
<tr>
<th>
Booking information
</th>
<th></th>
</tr>
<c:forEach items="$restaurants" var="restaurants">
<tr>
<td><h3>$restaurants</h3></td>
<td valign="bottom"><a href="/restaurant/edit/$restaurants.id">Edit restaurant</a></td>
<tr>
<table>
<col align="left" >
<col align="left" >
<col align="left" >
<col align="left" >
<col align="left" >
<col align="left" >
<col align="left" >
<col align="left" >
<col align="left" >
<col align="left" >
<tr>
<td align="left"><b>Date</b></td>
<td align="left"><b>Start</b></td>
<td align="left"><b>Duration</b></td>
<td align="left"><b># Of People</b></td>
<td align="left"><b>Name</b></td>
<td align="left"><b>Contact Pref.</b></td>
<td align="left"><b>Phone #</b></td>
<td align="left"><b>Comments</b></td>
<td align="left"><b>Booking date</b></td>
</tr>
<c:forEach items="$sortedBooking" var="sortedBooking">
<c:choose>
<c:when test="$restaurants == sortedBooking.restaurant.restaurantName">
<tr>
<td>$sortedBooking.date</td>
<td>$sortedBooking.start</td>
<td>$sortedBooking.duration</td>
<td>$sortedBooking.amountOfPeople</td>
<td>$sortedBooking.name</td>
<td>$sortedBooking.contactPreference</td>
<c:choose>
<c:when test="$sortedBooking.phoneNumber.equals('')">
<td>NO PHONE</td>
</c:when>
<c:otherwise>
<td>$sortedBooking.phoneNumber</td>
</c:otherwise>
</c:choose>
<c:choose>
<c:when test="$sortedBooking.comments.equals('')">
<td>NO COMMENTS</td>
</c:when>
<c:otherwise>
<td>$sortedBooking.comments</td>
</c:otherwise>
</c:choose>
<td>$sortedBooking.currentDatetime</td>
<td><a href="/booking/edit/$sortedBooking.id">Edit booking</a></td>
</tr>
</c:when>
</c:choose>
</c:forEach>
</table>
</tr>
</tr>
</c:forEach>
</table>
</section>
</div>
<jsp:include page="../fragments/footer.jsp"/>
</body>
我的editBooking.jsp：
<body>
<jsp:include page="../fragments/menu.jsp"/>
<div id="body">
<section class="content-wrapper main-content clear-fix">
<h2>Edit</h2>
<form:form modelAttribute="booking">
<table>
<tr>
<td>Restaurant*:</td>
<td><form:select path="restaurant.id">
<form:option value="" label="--- Select ---" />
<form:options items="$restaurants" itemValue="id" itemLabel="restaurantName" />
<td><form:errors path="restaurant.id" cssClass="error"/></td>
</form:select>
</tr>
<tr>
<td>Date*:</td>
<td><form:input path="date" type="date"/></td>
<td><form:errors path="date" cssClass="error"/></td>
</tr>
<tr>
<td>Starting time*:</td>
<td><form:input path="start" type="time"/></td>
<td><form:errors path="start" cssClass="error"/></td>
</tr>
<tr>
<td>Duration*:</td>
<td><form:input path="duration"/></td>
<td><form:errors path="duration" cssClass="error"/></td>
</tr>
<tr>
<td>Amount of people*:</td>
<td><form:input path="amountOfPeople"/></td>
<td><form:errors path="amountOfPeople" cssClass="error"/></td>
</tr>
<tr>
<td>Name*:</td>
<td><form:input path="name"/></td>
<td><form:errors path="name" cssClass="error"/></td>
</tr>
<tr>
<td>Contact preference*:</td>
<td><form:select path="contactPreference">
<form:option value="" label="--- Select ---" />
<form:option value="e-mail" label="E-mail" />
<form:option value="phone" label="Phone" />
<form:option value="other" label="Other" />
<td><form:errors path="contactPreference" cssClass="error"/></td>
</form:select>
</tr>
<tr>
<td>Phone number:</td>
<td><form:input path="phoneNumber"/></td>
<td><form:errors path="phoneNumber" cssClass="error"/></td>
</tr>
<tr>
<td>Comments:</td>
<td><form:textarea path="comments" rows="5" cols="30"/></td>
<td><form:errors path="comments" cssClass="error"/></td>
</tr>
<tr>
<td colspan="3"><input type="submit" /></td>
</tr>
</table>
</form:form>
<div>
<a href="/bookings">Back to List</a>
</div>
</section>
</div>
<jsp:include page="../fragments/footer.jsp"/>
</body>
感谢任何帮助！抱歉，帖子太长了。
编辑：我尝试更改我的代码以禁用更新，但它仍然不起作用。
@Column(name="current_datetime", updatable=false, nullable=false)
@Type(type="timestamp")
private Date currentDatetime = new Date();
【问题讨论】：
你editBookingAction做什么？是否保存或更新？你确定它没有创造新记录吗？你能试着用@CreationTimestamp注释你的日期吗？
【参考方案1】：
不要使用@Type(type="timestamp") 来存储日期。在许多数据库中，时间戳旨在跟踪更改，而不是作为应用程序逻辑的普通日期字段。因此，在数据库中切换到 DATETIME 并删除 @Type 注释，因为 hibernate 已经将 Date 转换为正确的类型。
另请参阅：
Should I use field 'datetime' or 'timestamp'? When to use datetime or timestamp【讨论】：
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