[FIXED] Message parameters not resolved using Thymeleaf

Issue

I'm working on a web application using Spring Boot + Thymeleaf and I'm using @Size annotation to validate a field of a form backing object:

@Size(max=50)
private String name;

By using the default error message, all works fine and I'm getting the following message:

size must be between 0 and 50

Now I'm trying to customize the error message. First of all I've tried the following:

@Size(max=50, message="Max size: {max}")
private String name;

And it's working correctly:

Max size: 50

But now I'd like to move the custom message in a messages.properties file. I set the property this way:

Size=Max size: {max}

But now I'm getting this error:

org.thymeleaf.exceptions.TemplateProcessingException: Error during execution of processor 'org.thymeleaf.spring4.processor.attr.SpringErrorsAttrProcessor' with root cause java.lang.NumberFormatException: For input string: "max"

It seems the max parameter is null, or something similar...

Why? What am I doing wrong?

Solution

In your messages.properties set like below.

Size=Max size {1}

Your field will be like below.

@Size(max=50)
private String name;

Answered By - abaghel
Answer Checked By - David Marino (JavaFixing Volunteer)