CODEWITHSUNDEEP
javajaxbdoubledecimal
Juraj Ćutić
Juraj Ćutić

Reputation: 206

Several decimal for double in JAXB

I create XML with JAXB, and I want to put double inside tags:

@XmlElement(name = "TaxFree")
private double taxFreeValue;

When I set value with setTaxFreeValue(4.5); in tags shows <TaxFree>4.5<TaxFree>

Is it possible in JAXB to get this <TaxFree>4.500<TaxFree> without transfer double to string?

Upvotes: 8

Views: 7683

Answers (3)

Quoc Tran
Quoc Tran

Reputation: 11

The cleanest way I've found is to use XMLAdapter. Create a DoubleAdapter class with:

public class DoubleAdapter extends XmlAdapter<String, Double> {
    @Override
    public Double unmarshal(String v) throws Exception {
        if (v == null || v.isEmpty() || v.equals("null")) {
            return null;
        }
        return Double.parseDouble(v);
    }

    @Override
    public String marshal(Double v) throws Exception {
        if (v == null) {
            return null;
        }
        //Edit the format to your needs
        return String.format("%.3f", v);
    }
}

To use it, simply add the annotation.

@XmlElement(name = "TaxFree")
@XmlJavaTypeAdapter(DoubleAdapter.class)
private double taxFreeValue;

Upvotes: 1

Evgeniy Dorofeev
Evgeniy Dorofeev

Reputation: 136012

The simplest way is this

double taxFreeValue;

@XmlElement(name = "TaxFree")
private String getTaxFree() {
    return String.format("%.3f", taxFreeValue);
}

Note that you can give this method any name and make it private JAXB dont care as soon as the annotation is present.

Upvotes: 5

bdoughan
bdoughan

Reputation: 149007

You can use an XmlAdapter to convert from the double value to the desired text (String) representation.

Upvotes: 4

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