DTO, DAO - Displaying/Formatting Data in the Presentation Layer

I need display multiple fields from a DTO throughout the presentation layer. What is the best way to format display data without duplicating the logic throughout presentation layer?
Example
I have a Person DTO that has first name, last name, and suffix 'getters' and am constantly showing the data out as "first last, suffix"
Options
1 - Create a utility class that formats the name of the Person DTO.
public class DisplayUtil{
     public static String DisplayName(PersonDTO person){
          return person.getFirstName() + " " + person.getLastName() + ", " + person.getSuffix();
}2 - Add a getter into the DTO that gets the data
public class PersonDto{
     //Other fields, getters, and setters
     public String getName(){
          return person.getFirstName() + " " + person.getLastName() + ", " + person.getSuffix();
}3 - Create a domain object (aka business object) using the "entity inherits from transfer object strategy".
public class Person extends PersonDto{
     public String getName(){
          return person.getFirstName() + " " + person.getLastName() + ", " + person.getSuffix();
}The easiest to implement now would be Option 2 above but it distorts what the DTO is supposed to be used for (which is transferring data).
What have you done in the past? What is an "acceptable" best practice? Are there other options that I haven't listed above that you use?

So, from what you advise you would have the following
code in all of the JSP pages of the Struts
app?
<c:out value="${person.firstName} ${person.lastName}"
/>
<c:logic test="${not empty person.suffix}">
<c:out value=", ${person.suffix}" />
</c:logic>The problem that I see with this is that changes
would be incredibly difficult at a later date, since
every page contains the logic about displaying the
proper name format. (Say the client wanted to change
to always display the last name first instead of the
first name for all the pages. With this logic code
being on every "template", their could be hundreds of
pages to change. This is where I could see the
benefit of a utility class like Option 1.)This is what the include directive is for. The JSP tags in your example should not exist (physically ) in each JSP file. They should be stored in a single JSP fragment file.
The JSP fragment file is then "included" in each page via include directive. If you need to change anything for this at a later date, then you go to the single fragment file and make the change once.
<html>
<head><title>Including Shared Stuff in JSP Pages</title></head>
<body>
<%@include file="shared/text.jspf" %> 
What It Do 
<jsp:include page="shared/text.jspf" />
</body>
</html>When each JSP file is converted to a Java servlet by the JSP Engine, it will grab the shared fragment and include it in the code for the servlet.

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i have a formula self-organizing maps
this formula is looking for D1, D1 is neuron index that will be searched for the smallest value.and the result are D1=2 ,D2=5, D3=17 from calculating with formula .it means the smallest value is 2, "2" from weight [2 2] in file attached.
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Attachments:
dika.vi ‏16 KB
weight.txt ‏1 KB
data .txt ‏1 KB

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