动态获取JSF中所有隐藏的输入字段 [英] Get all hidden input fields in JSF dynamically

问题描述

我有一些使用JQuery动态生成的隐藏输入.例如:

I have some hidden inputs that are generated dynamically using JQuery. For example :

<input type="hidden" name="name1" value="SomeValue1">
<input type="hidden" name="name2" value="SomeValue2">

方法

FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("name1") 

返回正确的值SomeValue1.但是，在运行时，我不知道输入名称.如何在不知道其名称的情况下获取所有隐藏的输入?

returns the value SomeValue1 which is correct. But, at runtime I am not aware of the input names. How can I get all the hidden inputs without knowing their names ?

感谢您的帮助.

推荐答案

为它们提供相同的名称，以便您可以使用

Give them all the same name, so that you can use getRequestParameterValuesMap() instead.

<input type="hidden" name="name" value="SomeValue1">
<input type="hidden" name="name" value="SomeValue2">
...

String[] names = externalContext.getRequestParameterValuesMap().get("name");

保证顺序与HTML DOM中的顺序相同.

The ordering is guaranteed to be the same as in HTML DOM.

或者，基于HTML DOM中的增量整数后缀，您也可以循环获取request参数，直到返回null.

Alternatively, based on the incremental integer suffix as you've in the HTML DOM, you could also just get the request parameter in a loop until null is returned.

List<String> names = new ArrayList<>();

for (int i = 1; i < Integer.MAX_VALUE; i++) {
    String name = requestParameterMap.get("name" + i);

    if (name != null) {
        names.add(name);
    } else {
        break;
    }
}

这篇关于动态获取JSF中所有隐藏的输入字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！