Siguiendo con el post:
http://emanuelpeg.blogspot.com.ar/2012/04/jasper-en-jsf.html
Ahora vamos a crear objetos que representen a los reportes y sus parámetros. Luego hacemos una pagina donde se pueda elegir el reporte,completar los parámetros e imprimir.
Clase reporte:
import java.util.ArrayList;
import java.util.List;
/**
* @author emanuel
*
*/
public class Report {
private Long id;
private String nombre;
private List parameters = new ArrayList();
private String fileName;
private String urlConnection;
private String driver;
public Report() {
}
public Report(Long id, String nombre, List parameters,
String fileName, String urlConnection, String driver) {
super();
this.id = id;
this.nombre = nombre;
this.parameters = parameters;
this.fileName = fileName;
this.urlConnection = urlConnection;
this.driver = driver;
}
//Getters and setters
}
Clase Parametro
package org.assembly.tyr.reports.model;
/**
* @author emanuel
*
*/
public class Parameter {
private String nombre;
private Type type;
private Object value;
public Parameter(String nombre, Type type) {
super();
this.nombre = nombre;
this.type = type;
}
//Getters and setters
}
El enum type
public enum Type {
STRING, NUMBER, DATE
}
Ahora hago un dao, no quiero usar la base de datos por lo tanto hago un mapa, ustedes usen la base de datos.
package org.assembly.tyr.reports.dao;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.assembly.tyr.reports.model.Parameter;
import org.assembly.tyr.reports.model.Report;
import org.assembly.tyr.reports.model.Type;
/**
* @author emanuel
*
*/
public class ReportDao {
private Map reports = new HashMap();
public ReportDao() {
List parameter1 = new ArrayList();
Report report1 = new Report(1l,"hola1", parameter1, "/resources/reports/reporte.jasper",
"jdbc:mysql://localhost:3306/holaMundo?user=root&password=",
"com.mysql.jdbc.Driver");
reports.put(1l, report1);
List parameter2 = Arrays.asList(new Parameter("prueba1", Type.NUMBER),
new Parameter("prueba2", Type.STRING),
new Parameter("prueba3", Type.DATE));
Report report2 = new Report(2l,"hola2", parameter2,
"/resources/reports/reporte2.jasper",
"jdbc:mysql://localhost:3306/holaMundo?user=root&password=",
"com.mysql.jdbc.Driver");
reports.put(2l, report2);
}
public Collection getAll() {
return reports.values();
}
public Report get(Long id) {
return reports.get(id);
}
}
Ahora agrego en el face-config.xml el controller.
reportGenerator
org.assembly.tyr.reports.ui.ReportGeneratorController
session
Agrego la pagina
Report
Report
y modifico el controller
package org.assembly.tyr.reports.ui;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import javax.faces.model.SelectItem;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperRunManager;
import org.assembly.tyr.reports.dao.ReportDao;
import org.assembly.tyr.reports.model.Parameter;
import org.assembly.tyr.reports.model.Report;
public class ReportGeneratorController {
private ReportDao reportDao = new ReportDao();
private Long reportId;
private List parameters;
private Map parameterValues = new HashMap();
public List getReportList() {
List result = new ArrayList();
Collection reports = reportDao.getAll();
for (Report report : reports) {
SelectItem item = new SelectItem(report.getId(), report.getNombre());
result.add(item);
}
return result;
}
public Long getReportId() {
return reportId;
}
public void setReportId(Long reportId) {
this.reportId = reportId;
}
public List getParameters() {
if ( reportId!= null) {
Report report = this.reportDao.get(reportId);
parameters = report.getParameters();
}
return parameters;
}
public void setParameters(List parameters) {
this.parameters = parameters;
}
public Map getParameterValues() {
return parameterValues;
}
public void setParameterValues(Map parameterValues) {
this.parameterValues = parameterValues;
}
public Object getParameterValue(String key) {
return this.parameterValues.get(key);
}
public String generateReportSubmit()
throws ClassNotFoundException, SQLException, IOException,
JRException {
Connection connection;
if (parameters != null) {
for (Parameter parameter: parameters) {
parameterValues.put(parameter.getNombre(), parameter.getValue());
}
}
Report report = this.reportDao.get(reportId);
//Buscamos el contexto de jsf
FacesContext facesContext = FacesContext.getCurrentInstance();
HttpServletResponse response = (HttpServletResponse) facesContext
.getExternalContext().getResponse();
//Con el contexto buscamos el jasper
InputStream reportStream = facesContext.getExternalContext()
.getResourceAsStream(report.getFileName());
ServletOutputStream servletOutputStream = response.getOutputStream();
//Nos conectamos a la base de datos (creamos una coneccion)
Class.forName(report.getDriver());
connection = DriverManager
.getConnection(report.getUrlConnection());
facesContext.responseComplete();
//seteamos el contentType
response.setContentType("application/pdf");
//ejecutamos el reporte
JasperRunManager.runReportToPdfStream(reportStream,
servletOutputStream, this.parameterValues, connection);
// Cerramos la coneccion a la Base
connection.close();
// flush y close del reporte
servletOutputStream.flush();
servletOutputStream.close();
return null;
}
}
Para ver el codigo:
https://code.google.com/p/jaspertyr
Leyendo infoQ me interese en la siguiente nota: http://www.infoq.com/news/2012/05/hadoop-microsoft
