如何从Play框架中的表单读取日期

Question

I have Date expirationDate field in my class. I also have select dropdown menu in my form with day/month/year

<select class="form-control" value="@form("day")" >
            <option>dd</option>
            @for(a <- 1 to 31) {
            <option>@a</option>
            }
</select>
<select class="form-control" value="@form("month")" >
            <option>mm</option>
            @for(a <- 1 to 12) {
            <option>@a</option>
            }
</select>
<select class="form-control" value="@form("year")" >
            <option>yyyy</option>
            @for(a <- 2014 to 2100) {
            <option>@a</option>
            }
</select>

How can i bind this data to java.util.Date type in controller? More specifically

public static Result createScenarioPOST() throws ParseException {
    User user=User.find
            .where().eq("email", session("email")).findUnique();

    Form<Creation> createForm = Form.form(Creation.class)
            .bindFromRequest();
    if (createForm.hasErrors()) {
        return badRequest(createScenario.render(createForm, user));
    } else {
        return redirect(routes.Application.index());
    }
}

Answer 1

The difficulty here comes from having separate input fields for day/month/year fields. Since Play's Form s map to individual values, you cannot use them to map to a single value.

Use a Form to map (and validate!) the individual values, then construct the Date the way you normally would create a Date .

An easier way to do this is by having the date be a single form value, for example by using an <input type="date"> input field. If your really must have separate fields and really want to bind it to a single field, you could consider using JavaScript to concatenate the separate fields into a single value on form submit.