Access Webserice - REST

once web service up and running we need to test that app. Alos when we are given end point of REST web app we need to verify.
We can just type the URI and get the details or response given from REST web service.
IF we get the URI for GET request for the example app We built,

http://localhost:8080/Rest/rest/employeeservices/getemployeedetail?employeeId=1

accessing through browser will give us the output

<employee>
<dateOfJoining>01-02-2001</dateOfJoining>
<department>Sales</department>
<email>test@example.com</email>
<employeeId>675436</employeeId>
<firstName>John</firstName>
<lastName>Smith</lastName>
</employee>


but here we don't have much options.
here we get the output in xml format. But if you can remember our service implementation it produces both "xml" and "json"