从数据库生成Excel工作表

Question

I am trying to create excel sheet with different different values from different table in database by using some joins my code is working but record is getting printed twice in the excel sheet i do not know i have checked everything please anyone help me here... here is my code..

public class ExcelFileGen extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, java.io.IOException {

    HttpSession session = request.getSession(true);
    String eid = (String) session.getAttribute("eid");

    try {
        String filename = "D:\\DailyWork.xls";
        HSSFWorkbook hwb = new HSSFWorkbook();
        HSSFSheet sheet = hwb.createSheet("new sheet");

        HSSFRow rowhead = sheet.createRow((short) 0);

        rowhead.createCell(0).setCellValue("date");
        rowhead.createCell(1).setCellValue("description");
        rowhead.createCell(2).setCellValue("Support HRS");
        rowhead.createCell(3).setCellValue("Development HRS");
        rowhead.createCell(4).setCellValue("training HRS");
        rowhead.createCell(5).setCellValue("Research HRS");
        rowhead.createCell(6).setCellValue("Meeting HRS");
        rowhead.createCell(7).setCellValue("leave hrs");
        rowhead.createCell(8).setCellValue("Project Name");
        rowhead.createCell(9).setCellValue("activity");
        rowhead.createCell(10).setCellValue("eid");
        rowhead.createCell(11).setCellValue("intime");
        rowhead.createCell(12).setCellValue("outtime");

        Connection con = ConnectionManager.getConnection();
        Statement st = con.createStatement();
                 ResultSet rs = st.executeQuery("select u.date, u.description, u.field1, u.field2, u.field3, u.field4, u.field5, u.field6, u.field7, u.activity, u.eid, d.intime, d.outtime, d.eid from updatework AS u, fulltime as d where d.eid = u.eid AND u.eid='"
                        + eid + "'");
        int i = 1;
        while (rs.next())

        {
            HSSFRow row = sheet.createRow((short) i);
            row.createCell(0).setCellValue(rs.getString("date"));
            row.createCell(1).setCellValue(rs.getString("description"));
            sheet.autoSizeColumn(1);
            row.createCell(2).setCellValue(rs.getString("field1"));
            sheet.autoSizeColumn(2);
            row.createCell(3).setCellValue(rs.getString("field2"));
            sheet.autoSizeColumn(3);
            row.createCell(4).setCellValue(rs.getString("field3"));
            sheet.autoSizeColumn(4);
            row.createCell(5).setCellValue(rs.getString("field4"));
            sheet.autoSizeColumn(5);
            row.createCell(6).setCellValue(rs.getString("field5"));
            sheet.autoSizeColumn(6);
            row.createCell(7).setCellValue(rs.getString("field6"));
            sheet.autoSizeColumn(7);
            row.createCell(8).setCellValue(rs.getString("field7"));
            sheet.autoSizeColumn(8);
            row.createCell(9).setCellValue(rs.getString("activity"));
            sheet.autoSizeColumn(9);
            row.createCell(10).setCellValue(rs.getString("eid"));
            sheet.autoSizeColumn(10);
            row.createCell(11).setCellValue(rs.getString("intime"));
            sheet.autoSizeColumn(11);
            row.createCell(12).setCellValue(rs.getString("outtime"));
            sheet.autoSizeColumn(12);

            i++;
        }
        FileOutputStream fileOut = new FileOutputStream(filename);
        hwb.write(fileOut);
        fileOut.close();
        System.out.println("Your excel file has been generated!");

    } catch (Exception ex) {
        System.out.println(ex);

    }
}

}

Answer 1

here is my solution everything was correct only but query was not proper now query is correct and its working ...

 ResultSet rs = st.executeQuery("select u.date, u.description, u.field1, u.field2, u.field3, u.field4, u.field5, u.field6, u.field7, u.activity, u.eid, d.intime, d.outtime, d.eid from updatework AS u, fulltime as d where (d.date=u.date) and (d.eid = u.eid) AND u.eid='"
                    + eid + "'");