提交表单后返回上一页（Spring/Hibernate）答案

【问题标题】：After submitting a form go back to previous page (Spring/Hibernate)提交表单后返回上一页（Spring/Hibernate）
【发布时间】：2016-04-01 17:56:50
【问题描述】：

我有一个位于“/restaurant/edit/{id}”的餐厅编辑页面。在该页面上，我可以（除其他外）通过按下“添加餐桌”按钮将餐桌添加到餐厅。该按钮将我带到位于“/restaurant/edit/{id}/table”的另一个页面。问题是，在我添加表格后 - 如何通过按按钮返回上一页？现在我的控制器正在返回“editRestaurant.jsp”，这是正确的值，但我也不知道如何传递相同的餐厅 ID。我希望你明白我的意思。

我的 RestaurantTableController.java：

@Controller
public class RestaurantTableController {

    @Autowired
    private RestaurantService restaurantService;

    @Autowired
    private RestaurantTableService restaurantTableService;

    @RequestMapping(value="restaurant/{id}/table", method = RequestMethod.GET)
    public String addRestaurantTable(Model model, @PathVariable Long id) {
        model.addAttribute("table", new RestaurantTable());
        return "newTable";
    }

    @RequestMapping(value = "restaurant/{id}/table", method = RequestMethod.POST)
    public String addRestaurantTableAction(@PathVariable Long id, @ModelAttribute ("table") RestaurantTable table, BindingResult result) {
        RestaurantTableFormValidator restaurantTableFormValidator = new RestaurantTableFormValidator();
        restaurantTableFormValidator.validate(table, result);
        if (result.hasErrors()) {
            return "newTable";
        }
        restaurantService.mergeRestaurant(id, table);
        return "editRestaurant";
    }

}

我的“newTable.jsp”：

<body>
<jsp:include page="../fragments/menu.jsp"/>
<div id="body">
    <section class="content-wrapper main-content clear-fix">

        <h2>Add New Table</h2>

        <form:form method="POST" modelAttribute="table">
            <table>
                <tr>
                    <td>Table size:</td>
                    <td><form:input path="tableSize" /></td>
                    <td><form:errors path="tableSize" cssClass="error"/></td>
                </tr>
                <tr>
                    <td>Table number:</td>
                    <td><form:input path="tableNumber" /></td>
                    <td><form:errors path="tableNumber" cssClass="error"/></td>
                </tr>
                <tr>
                    <td colspan="3"><input type="submit" onclick="goback()"/>
                    </td>
                </tr>
            </table>
        </form:form>

    </section>
</div>
<jsp:include page="../fragments/footer.jsp"/>

</body>

RestaurantController.java 中的相关方法：

@RequestMapping(value = "restaurant/edit/{id}", method = RequestMethod.GET)
public String editRestaurant(@PathVariable Long id, Model model) {
    Restaurant restaurant = restaurantService.getRestaurant(id);
    model.addAttribute("restaurant", restaurant);
    return "editRestaurant";
}

@RequestMapping(value = "restaurant/edit/{id}", method = RequestMethod.POST, params="submit")
public String editRestaurant(@ModelAttribute ("restaurant") Restaurant restaurant, BindingResult result) {
    RestaurantFormValidator restaurantFormValidator = new RestaurantFormValidator();
    restaurantFormValidator.validate(restaurant, result);
    if (result.hasErrors()) {
        return "editRestaurant";
    }
    restaurantService.updateRestaurant(restaurant);
    return "redirect:/bookings";
}

“editRestaurant.jsp”：

<div id="body">
    <section class="content-wrapper main-content clear-fix">

        <h2>Edit</h2>

        <form:form method="POST" modelAttribute="restaurant" >
            <table>
                <tr>
                    <td>Restaurant:</td>
                    <td><form:input path="restaurantName" /></td>
                    <td><form:errors path="restaurantName" cssClass="error"/></td>
                </tr>
                <tr>
                    <td>Address:</td>
                    <td><form:input path="address" /></td>
                    <td><form:errors path="address" cssClass="error"/></td>
                </tr>
                <tr>
                    <td colspan="3"><input type="submit" value="Submit" name="submit"/>
                    </td>
                </tr>
                <tr>
                    <c:forEach items="${restaurant.table}" var="item">
                        <td>${item.toString()}</td>
                    </c:forEach>
                </tr>
                <tr>
                    <td><a href="/restaurant/${id}/table">Add Table</a></td>
                </tr>
            </table>
        </form:form>
        <div>
            <a href="/bookings">Back to List</a>
        </div>


    </section>
</div>

【问题讨论】：

标签： java html spring hibernate jsp

【解决方案1】：

POST 成功后，你应该做一个重定向。

类似这样的：

return "redirect:/restaurant/edit/" + restaurant.getId();

或

return new RedirectView("/restaurant/edit/" + restaurant.getId(), false);

【讨论】：

【解决方案2】：

您可以使用不同的方法来返回包含参数的模型。我相信这可能会解决您的问题。

@RequestMapping(value = "restaurant/edit/{id}", method = RequestMethod.GET)
      public String editRestaurant(@PathVariable Long id, Model model) {
      Restaurant restaurant = restaurantService.getRestaurant(id);
      return new ModelAndView("editRestaurant", "restaurant", restaurant);
}

【讨论】：