Integrating JasperReports with other Frameworks - JasperReports for Java Developers

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In-Depth Information

Integrating JasperReports with

JavaServer Faces

JavaServer Faces (JSF) is the standard technology for developing user interfaces for

Java server applications. In theory, JavaServer Faces is view technology agnostic (that

is, it can be used to develop user interfaces for a variety of technologies). However,

in practice, JSF is almost always used to develop web applications.

JSF applications typically consist of JSP and backing beans, with the latter serving as

controllers for the former. JSF and JasperReports integration can be accomplished by

creating a backing bean that will generate a report. The following example illustrates

this technique:

package net.ensode.jsf;

import java.io.IOException;

import java.io.InputStream;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.util.HashMap;

import javax.faces.context.FacesContext;

import javax.faces.event.ActionEvent;

import javax.servlet.ServletOutputStream;

import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JRException;

import net.sf.jasperreports.engine.JasperRunManager;

public class ReportGenerator

{

public void generateReport(ActionEvent actionEvent)

throws ClassNotFoundException, SQLException, IOException,

JRException

{

Connection connection;

FacesContext context = FacesContext.getCurrentInstance();

HttpServletResponse response = (HttpServletResponse)

context.getExternalContext().getResponse();

InputStream reportStream = context.getExternalContext().

getResourceAsStream( " /reports/DbReport.jasper");

ServletOutputStream servletOutputStream =

response.getOutputStream();

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