如何将 Java 日期转换为 JSP 中 Joda 时间的 ReadableInstant？
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How to convert a java Date to a ReadableInstant for Joda Time inside a JSP?
提问by Sam Bricket
I instantiated a java.util.Dateobject called myDatein my controllerand passed it to my JSP where I have a Joda Time JSP tag configured with this at the top of the page:
我实例化了一个在 my 中java.util.Date调用的对象并将它传递给我的 JSP，在那里我在页面顶部配置了一个 Joda Time JSP 标记：myDatecontroller
<%@taglib prefix="joda" uri="http://www.joda.org/joda/time/tags" %>
and of course the necessary Mavendependencies added to the project via the POM file.
当然还有必要的Maven依赖项通过 POM 文件添加到项目中。
However, when I try to access myDatefrom the JSP like this:
但是，当我尝试myDate像这样从 JSP访问时：
<joda:format value="${myDate}" style="SM" />
I get this error:
我收到此错误：
javax.servlet.jsp.JspException:
value attribute of format tag must be a
ReadableInstant or ReadablePartial, was: java.util.Date
Referring to the documentation for the Joda Time JSP tags, I can't tell how I should 'convert' my myDateto a ReadableInstantor ReadablePartialin the context of this JSP?
参考Joda Time JSP 标签的文档，我不知道我应该如何在这个 JSP 的上下文中“转换” mymyDate到 aReadableInstant或ReadablePartial？
回答by BalusC
The error message is self-explaining. The JodaTime tags doesn't accept a Java SE standard Dateinstance, but a JodaTime DateTimeinstance or whatever implements JodaTime's ReadableInstantor ReadablePartial.
错误消息是不言自明的。JodaTime 标签不接受 Java SE 标准Date实例，而是一个 JodaTimeDateTime实例或任何实现 JodaTimeReadableInstant或ReadablePartial.
You need to convert it before providing it to the view.
您需要在将其提供给视图之前对其进行转换。
DateTime dateTime = new DateTime(date.getTime());
request.setAttribute("myDate", dateTime);
