Primefaces datatable formatting numbers

If you want a input then @Anderson's answer is more appropriate. If you only want a OutputText or OutputLabel I recommend creating your own convert, it would have a better semantics, a clearer understanding of what is being done and is easily reused on other screens.

Your facelets would look like:

<h:outputText value="#{seuBean.cep}">
    <f:converter converterId="CEPConverter" />
</h:outputText>

And the convert would look like:

@FacesConverter("CEPConverter")
public class CEPConverter implements Converter {

    @Override
    public Object getAsObject(FacesContext context, UIComponent component, String value) {
        String[] parts = value.split("-\.");
        return Integer.parseInt(join(parts));
    }

    @Override
    public String getAsString(FacesContext context, UIComponent component, Object value) {
        String valueAsString = value.toString();
        return formatCEP(valueAsString.substring(0, 2), valueAsString.substring(2, 5), valueAsString.substring(5));
    }

    private String formatCEP(String part1, String part2, String part3) {
        return part1.concat(".").concat(part2).concat("-").concat(part3);
    }

    private String join(String[] parts) {
        StringBuilder sb = new StringBuilder();

        for(String part : parts) {
            sb.append(part);
        }

        return sb.toString();
    }
}

This is a very simple implementation, you can even improve / customize it according to your understanding.

I'm still looking for a more simple form, but I ended up solving it this way:

dataTable :

<h:outputText value="#{bean.format('##.###-###', item.cep, true)}" style="float:left"/>

Bean :

public String format(String pattern, Object value, boolean suppressZero) {
    if (!suppressZero || Double.parseDouble(value.toString()) != 0) {
        MaskFormatter mask;
        try {
            mask = new MaskFormatter(pattern);
            mask.setValueContainsLiteralCharacters(false);
            return mask.valueToString(value);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    } else {
        return "";
    }
}

I believe that creating a converter that saves only the numbers is the simplest way to resolve this issue.

package br.com.t2tecnologia;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.FacesConverter;

@FacesConverter("app.numbersConverter")
public class AppNumbersConverter implements Converter {

    @Override
    public Object getAsObject(FacesContext context, UIComponent component, String value) {
        if (value == null) {
            return null;
        }

        return value.replaceAll("[^0-9+]", "");
    }

    @Override
    public String getAsString(FacesContext context, UIComponent component, Object object) {
        return object.toString();
    }

}

No .xhtml:

<p:inputMask mask="99.999-999" id="enderecoCepText" value="#{e.cep}" size="10"
             converter="app.numbersConverter"
             required="true" requiredMessage="CEP não informado."/>

Use this to convert to various other data, such as CPF, CNPJ, etc., to store only the numbers in the database column.

The most appropriate to use in your case would be the inputMask component of Primefaces. In your case the tag would look like this: <p:inputMask mask="99.999-9999"/>

You can find more by talking about the tag here .