Olá galera, venho recorrer a a juda de vcs mais uma vez!
Estou tentando criar um relatório no IReport sem conexão com um BD, e vi um tópico muito bom aqui no GUJ:
[url]http://www.guj.com.br/java/225496-ireport-sem-conexao-ao-bd-usando-jtable-#1617765[/url]
fiz exatamente como está lá, porém esta informando um erro que sinceramente não sei oque pode estar ocorrendo!
me código está assim:
Método que passa como parametro a jTable:
public void imprimeRelatorio() throws JRException {
try {
String arquivo = "RelEntrada.jasper"; //arquivo de relatorio
java.io.InputStream file = getClass().getClassLoader().getResourceAsStream(arquivo); //carrego o arquivo
JRTableModelDataSource tabela = new JRTableModelDataSource(jTable1.getModel()); //aqui eu crio um datasource usando a propria jtable
Map parametros = new HashMap(); //apenas crio um map, mas nem passo parametro nem nada, os parametros sao as colunas da jtable
JasperPrint printer = JasperFillManager.fillReport(file, parametros, tabela); //aqui eu passo a jtable(tabela) para o relatorio
JasperViewer view = new JasperViewer(printer, true); //preview
view.setVisible(true);
view.setTitle("Relatório de Movimentação Unitária por Veículo");
} catch (Exception ex) {
//JOptionPane.showMessageDialog(null,ex.getStackTrace());
ex.printStackTrace();
}
}
e em um botão chamo este método, e da o seguinte erro:
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)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:780)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)
at net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream.<init>(ContextClassLoaderObjectInputStream.java:53)
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:214)
at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:632)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:956)
at Janelas.JEntrada.imprimeRelatorio(JEntrada.java:47)
at Janelas.JEntrada.jButton1ActionPerformed(JEntrada.java:239)
at Janelas.JEntrada.access$200(JEntrada.java:29)
at Janelas.JEntrada$4.actionPerformed(JEntrada.java:126)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:177)
at java.awt.Dialog$1.run(Dialog.java:1039)
at java.awt.Dialog$3.run(Dialog.java:1091)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Dialog.java:1089)
at java.awt.Component.show(Component.java:1419)
at java.awt.Component.setVisible(Component.java:1372)
at java.awt.Window.setVisible(Window.java:801)
at java.awt.Dialog.setVisible(Dialog.java:979)
at Janelas.JanelaPrincipal.jMenuItem1ActionPerformed(JanelaPrincipal.java:95)
at Janelas.JanelaPrincipal.access$000(JanelaPrincipal.java:11)
at Janelas.JanelaPrincipal$1.actionPerformed(JanelaPrincipal.java:49)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1170)
at javax.swing.plaf.basic.BasicPopupMenuUI$Actions.doReturn(BasicPopupMenuUI.java:438)
at javax.swing.plaf.basic.BasicPopupMenuUI$Actions.actionPerformed(BasicPopupMenuUI.java:412)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2844)
at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:267)
at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:216)
at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2921)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2913)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2807)
at java.awt.Component.processEvent(Component.java:5815)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:693)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:958)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:830)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:657)
at java.awt.Component.dispatchEventImpl(Component.java:4282)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Se alguem poder compartilhar alguma ideia do que possa estar havendo, desde já agradeço!