如何在Spring MVC 3.0中显示格式化的DateTime? [英] How to display a formatted DateTime in Spring MVC 3.0?

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问题描述

在我的模型中有一个Joda-DateTime字段,并希望以JSP视图格式显示它。我注释了新的@DateTimeFormat批注:

pre code public class Customer {
private DateTime dateOfBirth;
$ b @DateTimeFormat(style =M-)
public DateTime getDateOfBirth(){
return dateOfBirth;




$ b $ p $现在我想在我的JSP中显示dateOfBirth:

 出生日期:$ {customer.dateOfBirth} 


 出生日期:2010-08 -11T11:23:30.148 + 02:00 

经过一番调查,我发现,使用spring:bind-tag:

 < spring:bind path =customer.dateOfBirth> 
出生日期:$ {status.value}
< / spring:bind>

有了这个功能,但是这个简单的任务似乎太复杂了。在列表中使用这种方法更复杂,因为你必须将列表索引整合到绑定路径中。所以我的问题是:是否有一个更简单的方法使用spring格式化注释显示一个格式化的值?

使用 spring:eval 使用 code>标签,它理解 @DateTimeFormat 规则:

  < spring:eval expression =customer.dateOfBirth/> 

或者,您可以删除 @DateTimeFormat 规则从你的模型到所有在一起,并使用Joda的formatDate标签Naikus说明。



在未来的版本中,春计划支持插入SpEL,这是 Spring表达式语言由spring:eval调用,作为JSP页面的默认统一EL实现。这将允许像 $ {customer.dateOfBirth} 这样的内联表达式通过SpEL路由。你可以在这里投票这个改进要求: https://jira.spring.io/browse/SPR -7459


I have a Joda-DateTime field in my model and want to display it formatted in a JSP view. I have annotated it with the new @DateTimeFormat annotation:

public class Customer {
   private DateTime dateOfBirth;

   @DateTimeFormat(style="M-")
   public DateTime getDateOfBirth() {
      return dateOfBirth;
   }
}

Now I want to display the dateOfBirth in my JSP:

Date of birth: ${customer.dateOfBirth}

But the result is unformatted:

Date of birth: 2010-08-11T11:23:30.148+02:00

After some research I found out, that I have to use the spring:bind-tag:

<spring:bind path="customer.dateOfBirth">
   Date of birth: ${status.value}
</spring:bind>

With this it works. But it seems too complicated for this simple task. And using this method on lists is even more complicated since you have to integrate the list-index into the binding-path.

So my question is: Is there a simpler way to display a formatted value using the spring formatting-annotations?

解决方案

Use the spring:eval tag which understands the @DateTimeFormat rule:

<spring:eval expression="customer.dateOfBirth" />

Alternatively, you can remove the @DateTimeFormat rule from your model all-together and use Joda's formatDate tag as Naikus illustrates.

In a future release, Spring plans to support plugging in "SpEL", which is the "Spring Expression Language" invoked by spring:eval, as the default Unified EL implementation for your JSP pages. This would allow in-line expressions like ${customer.dateOfBirth} to be routed through SpEL as well. You can vote up this enhancement request here: https://jira.spring.io/browse/SPR-7459.

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