Java Platform, Enterprise Edition (Java EE) 8
The Java EE Tutorial

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Customizing Validator Messages

Bean Validation includes a resource bundle of default messages for the built-in constraints. These messages can be customized and can be localized for non-English-speaking locales.

The following topics are addressed here:

The ValidationMessages Resource Bundle

The ValidationMessages resource bundle and the locale variants of this resource bundle contain strings that override the default validation messages. The ValidationMessages resource bundle is typically a properties file,, in the default package of an application.

Localizing Validation Messages

Locale variants of are added by appending an underscore and the locale prefix to the base name of the file. For example, the Spanish locale variant resource bundle would be

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