Controlador.HSSFCreateAeronave.java Source code

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Here is the source code for Controlador.HSSFCreateAeronave.java

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/*
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 */
package Controlador;

import BD.Aeronaves;
import Modelo.Aeronave;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;

/**
 *
 * @author
 */
public class HSSFCreateAeronave extends HttpServlet {

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }

    public void destroy() {
    }

    /**
     * Processes requests for both HTTP GET and POST methods.
     *
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, URISyntaxException {

        response.setContentType("application/vnd.ms-excel");
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet("new sheet");

        Aeronaves a = new Aeronaves();
        ArrayList<Aeronave> aeronaves = (ArrayList<Aeronave>) a.findAll();
        Map<String, Object[]> data = new HashMap<String, Object[]>();
        data.put("0", new Object[] { "id Aeronave", "Nombre" });
        for (int i = 0; i < aeronaves.size(); i++) {
            String j = "" + (i + 1);
            data.put(j, new Object[] { "" + aeronaves.get(i).getIdAeronave(),
                    String.copyValueOf(aeronaves.get(i).getNombre()) });
        }
        Set<String> keyset = data.keySet();
        int rownum = 0;
        for (String key : keyset) {
            Row row = sheet.createRow(rownum++);
            Object[] objArr = data.get(key);
            int cellnum = 0;
            for (Object obj : objArr) {
                Cell cell = row.createCell(cellnum++);
                if (obj instanceof Date) {
                    cell.setCellValue((Date) obj);
                } else if (obj instanceof Boolean) {
                    cell.setCellValue((Boolean) obj);
                } else if (obj instanceof String) {
                    cell.setCellValue((String) obj);
                } else if (obj instanceof Double) {
                    cell.setCellValue((Double) obj);
                }
            }
        }
        // Write the output 
        OutputStream out = response.getOutputStream();
        wb.write(out);
        out.close();
    }

    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (URISyntaxException ex) {
            Logger.getLogger(HSSFCreateAeronave.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /**
     * Handles the HTTP POST method.
     *
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (URISyntaxException ex) {
            Logger.getLogger(HSSFCreateAeronave.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /**
     * Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Example to create a workbook in a servlet using HSSF";
    }
}