Applet Error NullPointerException in JR 3.0.0

[mankari]

Hello

I have a problem with Displaying JViewer in Applet

I don't know the cause but I am really blocked the above,Because the Applet she really work in Eclipse Java Applet but from my Html page i have the under Error

 

I'm working with JasperReports 3.0.0 and IReport 3.0.0.

 

Can anybody help me?

 

I Wait your answers

 

Thanks, MANKARI

 

the console display this Error:

Code:

7 juil. 2008 01:01:35 org.apache.commons.beanutils.MethodUtils getMatchingAccessibleMethod
WARNING: Current Security Manager restricts use of workarounds for reflection bugs  in pre-1.4 JVMs.
java.lang.NullPointerException
	at java.io.File.<init>(Unknown Source)
	at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:155)
	at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:219)
	at AppletPrint.rapport(AppletPrint.java:109)
	at AppletPrint.init(AppletPrint.java:50)
	at sun.applet.AppletPanel.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

 

Applet Code

 

Code:

[code] import java.applet.Applet; import java.awt.Color; import java.awt.Dimension; import javax.swing.JButton; import java.awt.Rectangle; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.util.HashMap; import java.util.Map; import java.util.Random; import javax.swing.JPanel; import java.awt.GridBagLayout; import javax.swing.JInternalFrame; import net.sf.jasperreports.engine.*; import net.sf.jasperreports.engine.util.*; import net.sf.jasperreports.engine.xml.JRXmlLoader; import net.sf.jasperreports.engine.design.JasperDesign; import net.sf.jasperreports.engine.export.*; import net.sf.jasperreports.view.JasperViewer; import java.awt.BorderLayout; public class AppletPrint extends Applet { private static final long serialVersionUID = 1L; private JInternalFrame jInternalFrame = null; private JPanel jContentPane = null; private Connection con= null; // @jve:decl-index=0: /** * This is the default constructor */ public AppletPrint() { super(); } /** * This method initializes this * * @return void */ public void init() { this.setLayout(null); this.setSize(950, 516); this.getConnection(); this.rapport(); this.add(getJInternalFrame(), null); //jInternalFrame.getContentPane().add(chart); //jInternalFrame.setVisible(true); } /** * This method initializes jInternalFrame * * @return javax.swing.JInternalFrame */ private JInternalFrame getJInternalFrame() { if (jInternalFrame == null) { jInternalFrame = new JInternalFrame(); jInternalFrame.setBounds(new Rectangle(0, 0, 950, 500)); jInternalFrame.setContentPane(getJContentPane()); } return jInternalFrame; } /** * This method initializes jContentPane * * @return javax.swing.JPanel */ private JPanel getJContentPane() { if (jContentPane == null) { jContentPane = new JPanel(); jContentPane.setLayout(new BorderLayout()); } return jContentPane; } private Connection getConnection() { if (con == null) { try{ Class.forName("com.mysql.jdbc.Driver"«»); } catch(ClassNotFoundException e) { System.err.println("impossible de charger le pilote oraclethin"«»); } try { String DBurl = "jdbc:mysql://localhost:3306/chartdonnee"; con = DriverManager.getConnection(DBurl,"root","passroot"«»); } catch (SQLException e) { System.err.println("Connection à la base de données impossible"«»);} } return con; } private void rapport() { try {//JasperDesign jasperDesign = JRXmlLoader.load("C:\JavaApplication1\dist\src\test.jrxml"«»); JasperDesign jasperDesign = JRXmlLoader.load("C:\TestAppletReport\classic.jrxml"«»); JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); // - Paramètres à envoyer au rapport Map<String, String> params = new HashMap<String, String>(); params.put("reportTitle", "Rapport Profile des Employés"«»); params.put("author", "Mankari abdeljawad"«»); params.put("startDate", (new java.util.Date()).toString()); // - Execution du rapport JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params,con); // - Création du rapport au format HTML //JasperExportManager.exportReportToHtmlFile(jasperPrint,"C:\test.html"«»); JasperViewer.viewReport(jasperPrint); } catch (JRException e) { e.printStackTrace(); } } } // @jve:decl-index=0:visual-constraint="9,-108"

 

Web Page call the Applet

 

Code:

[code] <html> <head> <title> Page de test d'Applet </title> </head> <body> <br><br><br> <applet code= "AppletPrint.class" archive="lib/commons-beanutils-1.7.jar,lib/swing-layout-1.0.jar,lib/commons-collections-2.1.jar,lib/commons-digester-1.7.jar,lib/commons-logging-1.0.2.jar,lib/commons-logging-api-1.0.2.jar,lib/jasperreports-3.0.0.jar,lib/mysql-connector-java-3.0.17-ga-bin.jar,AppletReport.jar,lib/jfreechart-1.0.10.jar,lib/jcommon-1.0.13.jar" width="950" height="550"> Votre navigateur n'est pas compatible java. </applet> </body> </html>

 

My Sample Report

Code:

[code] <?xml version="1.0"?> <!DOCTYPE jasperReport PUBLIC "-//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd"> <jasperReport name="HelloReportWorld"> <detail> <band height="200"> <staticText> <reportElement x="0" y="0" width="500" height="20"/> <text><![CDATA[Hello Report World!]]></text> </staticText> </band> </detail> </jasperReport>

[lucianc]

Have you read this FAQ? Try to include a JDT compiler jar in your application.

 

Regards,

Lucian

[mankari]

thank's very much for your help

 

Mankari sincerely