提交Spring表单时的日期格式错误

Question

我有一个项目,我使用Spring MVC和Thymeleaf.我需要根据每个用户的偏好为每个用户显示不同格式的日期.例如,UserA希望显示像MM/dd/yyyy这样的日期,而UserB想要显示dd/MM/yyyy等日期.

为此,我使用此thymeleaf参数:

th:value="${#dates.format(myDate, dateFormat)}"

值"dateFormat"基于用户首选项.这很好用.

我的问题是日期输入是一个表单,当我提交表单时,它不采用良好的格式.我总是得到MM/dd/yyyy.

如果我选择格式dd/MM/yyyy并输入18/01/2016,在我的春季控制器中我获得"Thu Jun 01 00:00:00 CEST 2017",对应于2017年6月1日在dd/MM/yyyy .

如何以我想要的格式提供日期？

这是我的代码:

<form th:action="@{/test}" th:object="${filter}" th:method="POST">
    <input type="date" th:type="date" class="form-control" th:id="myDate"
           th:name="myDate" th:value="${#dates.format(filter.myDate, dateFormat)}"/>
</form>

控制器:

@RequestMapping(value = "/test", method = RequestMethod.POST)
public String myTest(@ModelAttribute Filter filter, Model model) {

    Systeme.out.println(model.dateFormat);
    // dd/MM/yyyy

    Systeme.out.println(filter.myDate.toString());
    // Thu Jun 01 00:00:00 CEST 2017

    return "test";
}

Answer 1

经过一天的研究,我发现Spring读取了Web请求中发送的值,并尝试将其与Filter对象绑定.

对于日期值,它除了找到具有"MM/dd/yyyy"格式的值.如果您使用其他格式发送值,则不起作用.

要解决此问题,可以使用注释"InitBinder".

@InitBinder
private void dateBinder(WebDataBinder binder) {
    //The date format to parse or output your dates
    SimpleDateFormat dateFormat = new SimpleDateFormat(dateFormat());
    //Create a new CustomDateEditor
    CustomDateEditor editor = new CustomDateEditor(dateFormat, true);
    //Register it as custom editor for the Date type
    binder.registerCustomEditor(Date.class, editor);
}

对每个Web请求执行此方法.在这里,我调用我的"dateFormat()"方法来获取用户首选项中的格式,并告诉Spring,它在Web请求中找到的所有java.util.Date都具有此格式.

这是我的完整代码:

过滤:

import java.util.Date;

@lombok.Data
public class TestDateFilter {
    private Date myDate;

    public TestDateFilter() {
        this.myDate = new Date();
    }
}

控制器:

@RequestMapping(value = "/testdate")
public String testDate(Model model) {
    model.addAttribute("filter", new TestDateFilter());
    return "testdate";
}

@RequestMapping(value = "/testdate", method = RequestMethod.POST)
public String testDatePost(@ModelAttribute("filter") TestDateFilter filter, Model model) {
    System.out.printf(filter.getLoadingStartDate().toString());
    System.out.printf(dateFormat());
    return "testdate";
}

@ModelAttribute("dateFormat")
public String dateFormat() {
    return userPreferenceService.getDateFormat();
}

@InitBinder
private void dateBinder(WebDataBinder binder) {
    //The date format to parse or output your dates
    SimpleDateFormat dateFormat = new SimpleDateFormat(dateFormat());
    //Create a new CustomDateEditor
    CustomDateEditor editor = new CustomDateEditor(dateFormat, true);
    //Register it as custom editor for the Date type
    binder.registerCustomEditor(Date.class, editor);
}

HTML:

    <form th:action="@{/testdate}" th:object="${filter}" th:method="POST">
        <div class="row">
            <div class="col-xs-12 col-sm-6">
                <div class="input-group date">
                    <input type="date" th:type="date" class="form-control"
                           th:id="loadingStartDate" th:name="loadingStartDate"
                           th:value="${#dates.format(filter.loadingStartDate, dateFormat)}" />
                </div>
            </div>
        </div>
        <div class="row">
            <div class="form-group">
                <div class="col-xs-12 col-sm-12">
                    <button type="submit" class="btn btn-primary btn-lg pull-right">
                        submit
                    </button>
                </div>
            </div>
        </div>
    </form>

Answer 2

您可以注释日期属性

    @DateTimeFormat(pattern = "dd/MM/yyyy")
    private Date dob;

从Spring 3.2开始就没有Joda依赖