Building Scalable Applications with Thymeleaf and Spring Boot/

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Custom Error Messages

Custom Error Messages

Learn how to add customized user-friendly messages on invalid inputs.

We'll cover the following...

Customizing messages

Using the internationalization support we set up earlier, we can change the error messages to something more user-friendly, and have them translated for each language.

We can change the error message for all validation errors of a certain type (e.g., all @NotNull violations) or we can precisely change the message for a single property on a single model attribute.

This is an example of the four options:

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NotBlank=The property '{0}' should not be blank.
NotBlank.email=Please enter the email address.
NotBlank.java.lang.String=The string should not be empty.
NotBlank.user.birthday=Please enter the birthday of the user.
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