Display Locations from Excel (or xml) File on Google Maps

I have an Excel spreadsheet describing the location of personnel. Columns of data include Name, Start Date, End Date, Account, City, State, Country, etc. I would like a webpage that reads this xls file off a specified web location and plots the location of personnel via the Google Maps API. Each marker would be clickable such that the name of the employee, location, dates, etc would pop up. This project requires knowledge of Java and the Google Maps API. I can save the Excel file as an xml spreadsheet or csv file if that simplifies things.