h:inputText值仅接受数字 [英] Accept only digits for h:inputText value

问题描述

是否可以在JSF中确认h:inputText的值，该值只能接受数字.表示它可以是Integer或float.

Is there a way to confirm the value of an h:inputText in JSF, which should accepts only digits. Means it can be an Integer or the float.

如果我键入12s3a562.675，a5678s12，68712haf.563345或任何其他此类值，则它应该显示错误.否则它将接受并继续.

If I type 12s3a562.675 , a5678s12 , 68712haf.563345 or any other such kind of values, then it should show an error. Otherwise it accepts and proceeds.

推荐答案

只需将输入值绑定到Double或更佳的BigDecimal属性而不是String.

Just bind the input value to a Double, or better, BigDecimal property instead of String.

private BigDecimal number; // Double can also, but beware floating-point-gui.de

<h:inputText value="#{bean.number}" />

对于这些类型，

JSF具有内置转换器自动加入.您可以自定义转换器消息，如下所示:

JSF has builtin converters for those types which will kick in automatically. You can customize the converter message as below:

<h:inputText value="#{bean.number}" converterMessage="Please enter digits only." />

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