使用GET提交JSF表单 [英] Submit a JSF form using GET

问题描述

JSF页面内容：

pre> < F：元数据>
< f：viewParam name =item1value =＃{bean.item1}/>
< f：viewParam name =item2value =＃{bean.item2}/>
< / f：元数据>

...

< h：表格>
< h：inputText value =＃{bean.item1}/>
< h：inputText value =＃{bean.item2}/>

< h：按钮值=提交>
< f：param name =item1value =＃{bean.item1}/>
< f：param name =item2value =＃{bean.item2}/>
< / h：按钮>
< / h：表格>


如果我请求页面：form.jsf？item1 = foo& item2 = bar，它将填充文本字段，但表单提交本身似乎并没有工作。

解决方案

替换< ; h：button> by

 < h：commandButton value =Submitaction = ？形成面临重定向=真放大器;放大器; includeViewParams =真/> 
  

它有效地激发了一个PRG（Post-Redirect-Get），它将包含< f：viewParam> 查询字符串中的参数。注意应该是目标页面必须完全相同< f：viewParam> 。

另一个解决方案是使用纯HTML < form> 而不是< h：form> ，给输入元素一个 id 匹配参数名称并使用普通的< input type =submit> 。您当然也可以在这里使用普通的HTML < input type =text> 。

 <形式> 
< h：inputText id =item1value =＃{bean.item1}/> 
< h：inputText id =item2value =＃{bean.item2}/> 
 
< input type =submitvalue =Submit/> 
< / form> 
  

您应该仍然保留< f：viewParam> 在双方。您只需要意识到无法在此表单中完成转换/验证，则必须通过目标页面上的< f：viewParam> 执行

参见：

• 什么可以< f：元数据> ;,< f：viewParam>和< f：viewAction>用于？

How do I submit a form to the same page and use GET parameters?

JSF page contents:

<f:metadata>
    <f:viewParam name="item1" value="#{bean.item1}"/>
    <f:viewParam name="item2" value="#{bean.item2}"/>
</f:metadata>

...

<h:form>
  <h:inputText value="#{bean.item1}"/>
  <h:inputText value="#{bean.item2}"/>

  <h:button value="Submit" >
      <f:param name="item1" value="#{bean.item1}"/>
      <f:param name="item2" value="#{bean.item2}"/>
  </h:button>
</h:form>

If I request the page: form.jsf?item1=foo&item2=bar, it will populate the text fields, but the form submission to itself doesn't seem to work.

解决方案

Replace <h:button> by

<h:commandButton value="Submit" action="form?faces-redirect=true&amp;includeViewParams=true"/>

It effectively fires a PRG (Post-Redirect-Get) which will include the <f:viewParam> params in the query string. Noted should be that the target page must have exactly same <f:viewParam>.

Another solution is to use a plain HTML <form> instead of <h:form>, give the input elements an id matching the parameter name and use a plain <input type="submit">. You can of course also use plain HTML <input type="text"> here.

<form>
    <h:inputText id="item1" value="#{bean.item1}"/>
    <h:inputText id="item2" value="#{bean.item2}"/>

    <input type="submit" value="Submit" />
</form>

You should still keep the <f:viewParam> in both sides. You only need to realize that conversion/validation couldn't be done in this form, they have to be performed via the <f:viewParam> on the target page.

See also:

• What can <f:metadata>, <f:viewParam> and <f:viewAction> be used for?

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