beancollectiondsreportservlet.java

利用jasperreports和Ireport做报表2

package net.ensode.jasperbook;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JasperRunManager;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;

public class BeanCollectionDSReportServlet extends HttpServlet
{
  private JRDataSource createReportDataSource()
  {
    JRBeanCollectionDataSource dataSource;
    Collection reportRows = initializeBeanCollection();

    dataSource = new JRBeanCollectionDataSource(reportRows);

    return dataSource;
  }

  private Collection initializeBeanCollection()
  {
    ArrayList reportRows = new ArrayList();

    reportRows.add(new AircraftData("N263Y", "T-11", "39 ROSCOE TRNR RACER",
        "R1830 SERIES"));
    reportRows.add(new AircraftData("N4087X", "BA100-163", "BRADLEY AEROBAT",
        "R2800 SERIES"));
    reportRows.add(new AircraftData("N43JE", "HAYABUSA 1",
        "NAKAJIMA KI-43 IIIA", "R1830 SERIES"));
    reportRows
        .add(new AircraftData("N912S", "9973CC", "PA18-150", "R-1820 SER"));

    return reportRows;
  }

  protected void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException
  {
    ServletOutputStream servletOutputStream = response.getOutputStream();
    InputStream reportStream = getServletConfig().getServletContext()
        .getResourceAsStream("/reports/BeanDSReport.jasper");

    try
    {

      JRDataSource dataSource = createReportDataSource();

      JasperRunManager.runReportToPdfStream(reportStream, servletOutputStream,
          new HashMap(), dataSource);

      response.setContentType("application/pdf");
      servletOutputStream.flush();
      servletOutputStream.close();
    }
    catch (Exception e)
    {
      // display stack trace in the browser
      StringWriter stringWriter = new StringWriter();
      PrintWriter printWriter = new PrintWriter(stringWriter);
      e.printStackTrace(printWriter);
      response.setContentType("text/plain");
      response.getOutputStream().print(stringWriter.toString());
    }
  }
}