JSF 2.0：验证2个InputSecret字段的相等性（确认密码）而不编写代码？ [英] JSF 2.0: Validate equality of 2 InputSecret Fields (confirm password) without writing Code?

问题描述

我正在使用JSF 2.0和Glassfish开发纯JavaEE6应用程序。
我的JSF实现是Primefaces（除了由Glassfish提供的Mojarra）。

I'm developing a pure JavaEE6 application with JSF 2.0 and Glassfish. My JSF implementation is Primefaces (beside Mojarra provided by Glassfish).

我想验证JSF表单中2个密码字段的值是否相等。
使用Seam，有一个整洁的组件< s：validateEquality for =pw1/> 。
我想在没有Seam的情况下做同样的事情，只需使用JSF（或者可能是JSF库的一个组件）。到目前为止，我只看到了使用自定义验证器验证表单的示例。但我想比较这些字段而不编写Java代码或Javascript代码。
这可能吗？

I want to verify if the values of 2 password fields in a JSF form are equal. With Seam, there is the neat component <s:validateEquality for="pw1"/>. I want do to the same without Seam, just using JSF (or maybe a component of a JSF library). Until now i only saw examples which validate the form with a custom validator. But i would like to compare the fields without writing Java code or Javascript code. Is that possible?

这与Seam一样：

...
<h:inputSecret id="passwort" value="#{personHome.instance.password}" 
    redisplay="true" required="true">
  <f:validateLength minimum="8"/>
  <a:support event="onblur" reRender="passwortField" bypassUpdates="true" ajaxSingle="true" />
</h:inputSecret>
...    
<h:inputSecret id="passwort2" required="true" redisplay="true">
  <!-- find the JSF2.0-equivalent to this tag: -->
  <s:validateEquality for="passwort"/>
  <a:support event="onblur" reRender="passwort2Field" bypassUpdates="true" ajaxSingle="true" />
</h:inputSecret>
...

推荐答案

这就是方式我终于做到了，我喜欢它，因为它很简单。唯一的问题是它不是真的可以重复使用，但因为我只需要在一个案例中使用它，我宁愿保存一些LOC并以这种方式执行。
我认为的片段：

This is the way i finally did it, which i like cause it's short and easy. The only problem is that it's not really re-usable, but as i only need this in one case, i rather save some LOCs and do it this way. Snippet from my view:

<h:inputSecret id="password" value="#{personHome.person.password}">
  <f:ajax event="blur" render="passwordError" />
</h:inputSecret> 
<h:message for="password" errorClass="invalid" id="passwordError" />

<h:inputSecret id="password2" validator="#{personHome.validateSamePassword}">
  <f:ajax event="blur" render="password2Error" />
</h:inputSecret> 
<h:message for="password2" errorClass="invalid" id="password2Error" />

我的支持Bean（只是重要部分）：

My Backing Bean (just the important part):

@Named @ConversationScoped
public class PersonHome {
  private Person person;

  public Person getPerson() {
    if (person == null) return new Person();
    else return person;
  }

  public void validateSamePassword(context:FacesContext, toValidate:UIComponent, value:Object) {
    String confirmPassword = (String)value;
    if (!confirmPassword.equals(person.getPassword()) {
      FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, "Passwords do not match!", "Passwords do not match!")
      throw new Validatorexception(message);
    }
  }

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