JSF号码验证 [英] JSF Number Validation

问题描述

JSF中是否有任何内置的数字验证器标记来检查在h:inputext字段中输入的输入是否为数字?

Is there any inbuilt number validator tag in JSF that checks whether an input entered in h:inputext field is a number?

第一个问题已回答.编辑以解释下一个问题:

The first question was answered. Edited to explain the next problem:

<h:inputText id="maxrecs" value="#{simpleBean.numRecords}" required="false" maxlength="4" >                         
    <f:convertNumber longOnly="true"/>
</h:inputText>

后备豆

private long numRecords = null;

如果在后备bean中使用String或Integer对象，则未设置值.现在，当我使用基本int时，屏幕上将打印0.我希望屏幕为空.

If I use String or Integer object in the backing bean , value is not being set. Now when I use primitive int, 0 is being printed on the screen. I would like the screen to be empty.

推荐答案

您可以使用f:convertNumber(使用integerOnly属性).

You can use f:convertNumber (use the integerOnly attribute).

您可以在此处获得更多信息.

You can get more information here.

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