utiliser JasperReports avec JSF
Salut tout le monde. Je n'arrive pas à afficher un PDF dans le browser. Est-ce que quelqu'un a un exemple concret, svp?
J'ai essayé d'appliquer la technique suivante (reprise dans le tutoriel de JasperReports):
Code:
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public class ReportGenerator {
public void generateReport(ActionEvent event)
throws ClassNotFoundException, SQLException, IOException,
JRException {
Connection connection;
FacesContext context = FacesContext.getCurrentInstance();
HttpServletResponse response = (HttpServletResponse) context
.getExternalContext().getResponse();
InputStream reportStream = context.getExternalContext()
.getResourceAsStream("/src/reports/mysqlReport.jasper");
ServletOutputStream servletOutputStream = response.getOutputStream();
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager
.getConnection("jdbc:mysql://localhost:3306/test?user=root&password=pwd");
JasperRunManager.runReportToPdfStream(reportStream,
servletOutputStream, new HashMap<String, String>(), connection);
connection.close();
response.setContentType("application/pdf");
servletOutputStream.flush();
servletOutputStream.close();
}
}
Ma page jsp:
Code:
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<f:view>
<h:outputText value="Click on the link below to generate the
report." />
<h:form>
<h:commandLink action="generate_report"
actionListener="#{reportGenerator.generateReport}">
<h:outputText value="Generate Report" />
</h:commandLink>
</h:form>
</f:view> |
|
Mais là ils utilisent MyFaces et avec jsf de SUN_RI cea ne fonctionne pas:(
Ca donne l'erreur suivante:
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GRAVE: Received 'java.lang.NullPointerException' when invoking action listener '#{reportGenerator.generateReport}' for component 'j_id_jsp_320462548_3'
22-nov.-2007 12:35:42 javax.faces.event.MethodExpressionActionListener processAction
GRAVE: java.lang.NullPointerException
at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2264)
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2277)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2748)
.... |
et à la fin ceci:
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22-nov.-2007 12:35:42 com.sun.faces.lifecycle.LifecycleImpl phase
ATTENTION: executePhase(RENDER_RESPONSE 6,com.sun.faces.context.FacesContextImpl@4e2f0a) threw exception
javax.faces.FacesException: org.apache.jasper.JasperException: An exception occurred processing JSP page /generate.jsp at line 12
9: <title>Report Generation</title>
10: </head>
11: <body>
12: <f:view>
13: <h:outputText value="Click on the link below to generate the
14: report." />
15: <h:form>
Stacktrace:
at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:413)
at com.sun.faces.application.ViewHandlerImpl.executePageToBuildView(ViewHandlerImpl.java:442)
at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:115)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
... |
Merci pour l'aide.
