I uses JSTL and Struts tag to achieve what you want.
Since you're having a vector of JavaBeans, you'll need the <logic:iterate> tag, then during each iteration, you'll need the <bean:write> tag to obtain the value of the property in the bean that you're interested in. From your posts, I think you've reach this far.
You'll need to insert a step in between. Using JSTL <c:set> tag, you embed the <bean:write> tag in it. This way, your value doesn't get printed out. It gets set into a variable, that you can specify its scope.
Lastly, you can use JSTL <fmt> to format your output.