Displaying data contained in string ina excel sheet

hi,
I am provided two string arrays containing data fetchd from data base.
I am required to display them in M-s EXcel format .
I have to write a servlet , to accomplish tis task.
Can any one suggest me a way to start
i used the following sample tostart with:
     String a=new String("arvind");
          response.setContentType("application/ms-excel");
          java.io.PrintWriter out1= response.getWriter();
          out1.write(a);
but upon clicking the button to generate it says, unable to create xxxxx.jsp page do u want to open a new file
how do i overcome this problem

If you had made a search, you would have found hints about Apache POI.
http://jakarta.apache.org/poi/index.html

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