自动在 URL 中包含视图参数 [英] Automatically include view parameters in URL

问题描述

我有一个简单的 jsf 页面，带有视图参数和正在处理这些参数的加载方法:

I have simple jsf page with view params and load method which is processing those params:

<f:metadata>
 <f:viewParam name="param1" value="#{bean.param1}"/>
 <f:viewParam name="param2" value="#{bean.param2}"/>
 <f:viewParam name="param3" value="#{bean.param3}"/>
 <f:event type="preRenderView" listener="#{bean.load()}"/>
</f:metadata>

我还在@PostConstruct 中设置了一些初始值.如何将用户重定向到包含这些参数(不为空)的新位置.例如用户在浏览器中输入:

I also set some initial values in @PostConstruct. How to redirect user to new location that include those parameters (which are not null). For example user enter in browser:

domain.com/page.jsf

并重定向到:

domain.com/page.jsf?param1=valueA

因为 param1 是在 @PostConstruct 中设置的.

because param1 was set in @PostConstruct.

另一个问题 - 我在页面上有引用相同视图的链接:

Another question - I have links on page referencing same view:

<h:link value="clickme">
 <f:param name="param3" value="otherValue"/>
</h:link>

当用户使用 ?param1=someValue 进入页面并点击链接时，被重定向到 ?param3=otherValue 但我想重定向到 ?param1=someValue&param3=otherValue.我知道我可以在 中添加更多参数，但是很难在每个

When user enters page with ?param1=someValue and clicks link, got redirected to ?param3=otherValue but I want to redirect to ?param1=someValue&param3=otherValue. I know I can add more parameters in <h:link> but it's diffucult to add every possible param in every <h:link>

附注.我使用本主题中的 BalusC 提示 JSF 2 和 Post/Redirect/Get?

PS. I use BalusC tip from this topic JSF 2 and Post/Redirect/Get?

推荐答案

至于第一个问题:您可以在导航案例结果中添加includeViewParams=true.但是，当您在 preRenderView 方法中执行此操作时，您永远无法保证会成功重定向.那时可能已经太晚了.

As to the 1st question: you can add includeViewParams=true to the navigation case outcome. But you can never guarantee that you'll sucessfully be redirected while you're doing that inside a preRenderView method. It might be already too late then.

关于第二个问题:您可以将的includeViewParams属性设置为true.

As to the 2nd question: you can set the includeViewParams attribute of <h:link> to true.

<h:link value="clickme" includeViewParams="true">
    <f:param name="param3" value="otherValue"/>
</h:link>

或者，您也可以将 includeViewParams=true 添加到结果中.

Alternatively, you can also add includeViewParams=true to the outcome.

<h:link value="clickme" outcome="otherPage?includeViewParams=true">
    <f:param name="param3" value="otherValue"/>
</h:link>

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