jsf - 如何在 Primefaces 中获取带有当前时间戳的选定日期？

Question

我正在从 <p:calendar> 中选择一个日期组件，我想将当前时间附加到所选日期。

假设现在时间是12/13/13 04:30:12 .

我选择的日期是 12/17/13来自日历，我想将其保存为 12/17/13 04:30:12 .

Answer 1

您可以实现您的自定义 @FacesConverter并将其应用于 <p:calendar>组件。

@FacesConverter("timestampConverter")
public class TimestampConverter implements Converter {

    @Override
    public Object getAsObject(FacesContext facesContext, 
                              UIComponent uIComponent, 
                              String string) {
        SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yy");
        Date date = null;
        Calendar calendar = Calendar.getInstance();
        try {
            date = sdf.parse(string);
            calendar.setTime(date);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        Calendar now = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, now.get(Calendar.HOUR_OF_DAY));
        calendar.set(Calendar.MINUTE, now.get(Calendar.MINUTE));
        calendar.set(Calendar.SECOND, now.get(Calendar.SECOND));
        Timestamp result = new Timestamp(calendar.getTime().getTime());
        return result;
    }

    @Override
    public String getAsString(FacesContext facesContext, 
                              UIComponent uIComponent, 
                              Object object) {
        if (object == null) {
            return null;
        }    
        return object.toString();
    }
}

在getAsObject(..)方法你可以获得String这是从前端接收到的，追加当前时间并构造一个 Timestamp结果对象。

facelet 中的片段(加上我的测试按钮)如下所示:

<h:form>
    <p:calendar value="#{myBean.date}" >
        <f:converter converterId="timestampConverter" />
    </p:calendar>
    <p:commandButton title="Test" action="#{myBean.testAction}" />
<h:form>

并且在 myBean类应该有一个 date具有相应访问器方法的属性。

@RequestScoped
@ManagedBean(name = "myBean")
public class MyBean {
    private Date date;

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        return date;
    }

    public String testAction() {
        SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/YY HH:mm:ss");
        String output = sdf.format(date);
        System.out.println("Selected date with timestamp: " + output);
    }
}

更多信息:

• JSF Custom Converter