我有一个可以创建 PDF 文件的 Java 应用程序。例如，我从程序创建一个简单的文件，我已经构建了代码来打开该文件。
所以我创建了该文件，我看到了它，然后就可以了。
如果我想修改该文件，我必须关闭该文件然后重新创建它，如果我不关闭该文件，则会出现以下错误：
java.io.FileNotFoundException: Archivio_Etichette\_12-4-2015.pdf (Impossibile accedere al file. Il file è utilizzato da un altro processo)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
at com.mcsolution.easyMgmt.print.pdf.FoglioFattura.stampaEtichette(FoglioFattura.java:2215)
at Etichette.PanelBigliettiAdesivi.stampaEtichette(PanelBigliettiAdesivi.java:242)
at Etichette.PanelBigliettiAdesivi$1.actionPerformed(PanelBigliettiAdesivi.java:273)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6516)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6281)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4872)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
这是我用来创建 PDF 的代码
public static void stampaEtichette(String percorsoOperazione,
List<Articoli>listaArticoli,
Integer numeroCella,boolean aprire)throws DocumentException
{
String folderName = DateUtil.getDataGiornaliera();
percorsoOperazione = (new StringBuilder()).append(percorsoOperazione).append(""+"_"+folderName).append(".pdf").toString();
File f = new File(percorsoOperazione);
try {
OutputStream os = new FileOutputStream(f);
Document doc = new Document(PageSize.A4, -74F, -74F, 0F, 0F);
PdfWriter docWriter = PdfWriter.getInstance(doc, os);
// String testo = "Anagrafica Clienti";
doc.open();
float[] ciccio = {25f,25f,25f,25f};
PdfPTable table = new PdfPTable(ciccio);
table.setSpacingAfter(0f);
table.setSpacingBefore(0f);
PdfContentByte cb = docWriter.getDirectContent();
if(numeroCella!=null){
for(int i=1; i< numeroCella;i++){
Paragraph Descrizione = new Paragraph("", FontFactory.getFont("Century Gothic", 7F, Font.BOLD));
Paragraph Costo = new Paragraph("", FontFactory.getFont("Century Gothic", 10F, Font.BOLD));
PdfPCell cell = new PdfPCell();
cell.setVerticalAlignment(5);
cell.setHorizontalAlignment(1);
cell.setColspan(1);
cell.setFixedHeight(84.1F);
cell.setBorderWidth(0.0F);
cell.setPadding(0F);
Descrizione.setAlignment(1);
cell.addElement(Descrizione);
Costo.setAlignment(1);
cell.addElement(Costo);
table.addCell(cell);
}
}
doc.add(table);
doc.close();
os.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch(IOException exp)
{
exp.printStackTrace();
}
catch(DocumentException exp2)
{
exp2.printStackTrace();
}
if(aprire)
{
if(Desktop.isDesktopSupported())
{
try
{
Desktop.getDesktop().open(f.getCanonicalFile());
}
catch(IOException ex)
{
JOptionPane.showMessageDialog(null, ex.getMessage());
}
} else
{
JOptionPane.showMessageDialog(null, "Non è stato trovato un software per aprire i file PDF.", "Errore", 0);
}
}
// return pathimg;
}//fine stampa etichette
错误就在这一行
OutputStream os = new FileOutputStream(f);
我该如何修复它？
