package net.ensode.jasperreportsbrowserdemo;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
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.JREmptyDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperRunManager;
public class JasperReportsBrowserDemoServlet extends HttpServlet
{
protected void doGet(HttpServletRequest request，HttpServletResponse response)
throws ServletException，IOException
{
ServletOutputStream servletOutputStream = response.getOutputStream();
File reportFile = new File(getServletConfig().getServletContext()
.getRealPath("/reports/Simple_Report.jasper"));
byte[] bytes = null;
try
{
bytes = JasperRunManager.runReportToPdf(reportFile.getPath()，
new HashMap()，new JREmptyDataSource());
response.setContentType("application/pdf");
response.setContentLength(bytes.length);
servletOutputStream.write(bytes，0，bytes.length);
servletOutputStream.flush();
servletOutputStream.close();
}
catch (JRException e)
{
//在浏览器中显示栈跟踪消息 
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
e.printStackTrace(printWriter);
response.setContentType("text/plain");
response.getOutputStream().print(stringWriter.toString());
}
}
}

package net.ensode.jasperreportsbrowserdemo;
//……导入语句（省略） 
public class JasperReportsBrowserDemoServlet2 extends HttpServlet
{
protected void doGet(HttpServletRequest request， HttpServletResponse response)
throws ServletException， IOException
{
ServletOutputStream servletOutputStream = response.getOutputStream();
InputStream reportStream = getServletConfig().getServletContext()
.getResourceAsStream("/reports/Simple_Report.jasper");
try
{
JasperRunManager.runReportToPdfStream(reportStream， servletOutputStream，
new HashMap()，new JREmptyDataSource());
response.setContentType("application/pdf");
servletOutputStream.flush();
servletOutputStream.close();
}
catch (JRException e)
{
//处理异常 
}
}
}