CODEWITHSUNDEEP
springthymeleaf
svenhornberg
svenhornberg

Reputation: 15836

Map with custom formatter in thymeleaf view

I am trying to convert a Map with a custom Formatter.

I created an @LongCurrency Annotation, which converts long values like this:

Long -> String

22 -> 00,22

3310 -> 33,10

String -> Long

3 -> 3

22,11 -> 2211

(Custom Annotation-driven Formatting Spring MVC)

Everything is working so far. Now I would like to convert a Map with that formatter. Here is some pseudocode which should show what I am try to accomplish.

@LongCurrency
private Map<Integer, Long> test;

//only to make clear what I am trying to do.
private Map<Integer, @LongCurrency Long> test;

A second way may be to use the conversions utility object from Thymeleaf. http://www.thymeleaf.org/doc/thymeleafspring.html#the-conversion-service

I tryed something like this :

Controller:

 model.addAttribute("test", 3333L);

Thymeleaf:

<td th:text="${#conversions.convert(${test},LongCurrency)}}"></td>

but it does not work. Errormessage: org.thymeleaf.exceptions.TemplateProcessingException: Could not parse as expression: "${#conversions.convert(${test},LongCurrency)}}"

I would be thankful for help or ideas for one or both ways.

EDIT1: a "normal" annotated long value works

Bean: 

@LongCurrency
private long test2;

Thymeleaf

<div th:text="${{test2}}" >

Upvotes: 3

Views: 2805

Answers (2)

Roberto Petrilli
Roberto Petrilli

Reputation: 865

In a spring boot project, I created a standard Spring Service

@Service
public class ThemeLeafService {
    public String formatTime(Integer time){
        var min= Optional.of(time).orElse(0);
        return String.format("%02d:%02d", min/60, min%60);
    }
}

I referenced in my template

<span th:text="${@themeLeafService.formatTime(spettacolo.ora)}"></span>

Upvotes: 0

svenhornberg
svenhornberg

Reputation: 15836

I got third way working for me. I created a LongCurrencyService which calls the parse and print methods of my Formatter-class.

@Named
@Singleton
public class LongCurrencyService {

    public static String LongToStringCurrency(Long value) {
        LongCurrencyFormatter longCurrencyFormatter = new LongCurrencyFormatter();
        return longCurrencyFormatter.print(value, Locale.GERMAN);
    }

    public static Long StringToLongCurrency(String value) throws ParseException {
        LongCurrencyFormatter longCurrencyFormatter = new LongCurrencyFormatter();
        return longCurrencyFormatter.parse(value, Locale.GERMAN);
    } 
}

In my Thymeleaf I use that EL:

 <h1 th:text="${@longCurrencyService.LongToStringCurrency(test)}"></h1>

which prints 33,33 as wanted.

My way is working for me, but I don't if I should accept my own answer. It is not the answer to my question, how to annotate a map with a formatter.

Upvotes: 3

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