Problem when opening excel sheet in jsp

Question

Hi friends
When i try to open excel sheet from my program I am getting two problems
1. first row of excel sheet is empty
2. while opening I am getting error message of "the file is not in a recognizable format"
Please help me..It is an urgent work
my code
<%@page language="java" import="java.io.*,java.text.*,java.sql.*,java.util.*"%>
<%
Class.forName("org.gjt.mm.mysql.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://256.136.119.86/mydb","zzz","zzz");
Statement st = conn.createStatement();
StringBuffer sb = new StringBuffer();
sb.append("SAP#" + "\t");
sb.append("x-plant status" + "\t");
sb.append("Total Amount" +"\t");
sb.append(">90 days" + "\t");
sb.append("\n");
try
String query="select * from temp_Xplant";
ResultSet rs = st.executeQuery(query);
while(rs.next()){
sb.append(rs.getString("sapNo") + "\t");
sb.append(rs.getString("status")+ "\t");
sb.append(rs.getString("amt") + "\t");
sb.append(rs.getString("days") + "\t");
sb.append("\n");
conn.close();
st.close();
catch (Exception e)
out.println("error");
conn.close();
st.close();
response.setContentType("application/vnd.ms-excel");
// response.setHeader("Content-Disposition", "attachment; filename=\"test.xls\"");
String testt = "tests.xls";
response.setHeader("Content-Disposition", "attachment; filename="+testt);
out.println(sb.toString());
out.close();
%>
thanks in advance

Answer 1

The problem here is, you have setted the content type as excel sheet and you are writing some String content into the output stream. when excel tries to read the String content it will surely throw some error. Lot of excel APIs are available in the market to generate excel sheets.
you can find one in the below URL.
http://www.teamdev.com/downloads/jexcel/docs/JExcel-PGuide.html