[FIXED] Thymeleaf - Populate ang get language property values

Issue

Circumstances

I'm using Spring Boot with Thymeleaf for populating my HTML template files and get back the result as a String. For that I used SpringTemplateEngine.

The code looks like this

    Context context = new Context();
    context.setVariables(myProperties);
    return templateEngine.process(htmlTemplateName, context);

The problem I want to achieve something similar, but with language.property files

I have two language property files: language.properties and language_en.properties which looks like this

my.value = This a string containing a dummy name = {name}

What I want to achieve?

1. I want to use thymeleaf to reach the correct language property file
2. Populate the {name} variable with a defined variable. The templating should be based on variable name like in HTMLs eg: hashmap: <"name", "FooName">
3. Get back the populated text as String. I don't have HTML file, I just want to use the templating mechanism of the thymeleaf.

Question

Is it possible and how can I do that? What is the right formatting in language.properties if it's possible?

Solution

Yes, you can!

You need to configure a MessageSource bean with the correct basename to your message files in your resource directory, like: spring.messages.basename=path/to/language, assuming your properties files are located at path/to/language(_en).properties Given this bean, wherever you need a translated string, you inject an instance of Messages and use that to get your translated string for a given message key:

public class I18NHelper {

    private final Messages messages;

    public I18NHelper(final Messages messages) {
        this.messages = messages;
    }
    
    public String translate(String key, String name) {
        return messages.getMessage(key, name);
    }
}

Answered By - kistlers
Answer Checked By - David Goodson (JavaFixing Volunteer)