Set decimal separator when using f:convertNumber

问题

I want to know how to set the default decimal separator on my JSF application. I have some <h:inputText> that I need to format as money, with 2 decimals. Right now the decimal separator used by default is the comma , and this gives me an error when I do some operations on save. I don\'t know if I can set the decimal separator to be used everytime that I use <f:convertNumber> tag.

I tried to use this:

<f:convertNumber pattern=\"########0.00\" groupingUsed=\"false\" />

but it still sets the comma as decimal separator.

回答1:

The default decimal separator depends on the locale used. You can set it in 2 ways:

1. On a per-view basis by the locale attribute of the <f:view> tag:

   <f:view locale="#{bean.locale}">
   

2. On a per-converter basis by the locale attribute of the <f:convertNumber> tag:

   <f:convertNumber locale="#{bean.locale}" />
   

It's unclear what locale you're targeting, but the use of . as fraction separator is typical for US dollars with a locale of en-US, for example. So you need to set it as such:

<f:convertNumber type="currency" currencySymbol="$" locale="en-US" />

It can also be obtained from a java.util.Locale bean property.

<f:convertNumber type="currency" currencySymbol="$" locale="#{bean.locale}" />

Note that I used type="currency", that's more self-documenting.

See also:

• Does <f:convertNumber> use the right number separator when using patterns to format currency?
• Localization in JSF, how to remember selected locale per session instead of per request/view

来源：https://stackoverflow.com/questions/7856152/set-decimal-separator-when-using-fconvertnumber