Regarding pdfbox

[gaurav mundhada <sk...@gmail.com>]

I am trying to use pdfbox for my java program while using it i was facing
error.
I was supposed to open the pdfbox in jpanel in java swing but i was getting
as output was only a screen and on my netbean output console.
do you have any example or document regarding how to use the pdfbox.


HERE is code :

import java.awt.*;
import java.lang.reflect.*;
import java.util.List;

import javax.swing.*;

import org.apache.pdfbox.PDFReader;
import org.apache.pdfbox.pdfviewer.PageWrapper;
import org.apache.pdfbox.pdmodel.PDPage;

public class CustomPDFReader extends PDFReader {
/**
 *
 */
private static final long serialVersionUID = 678451510308887925L;

public CustomPDFReader() {
    super();
}

public void setCurrentFile(String file) {
    try {
        Method m =
getClass().getSuperclass().getDeclaredMethod("openPDFFile",
                new Class<?>[]{String.class, String.class});
        m.setAccessible(true);
        m.invoke(this,file,null);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public static void main(String []args) {
    CustomPDFReader reader = new CustomPDFReader();
    // remove menubar
    JMenuBar menu = reader.getJMenuBar();
    menu.setVisible(false);

    JPanel header = new JPanel(new BorderLayout());

    JPanel firstLine = new JPanel();

    JLabel label = new JLabel("Label");
    firstLine.add(label);

    JPanel secondLine = new JPanel();

    JTextField text = new JTextField();
    text.setPreferredSize(new Dimension(100, 30));
    secondLine.add(text);

    JButton button = new JButton("Button");
    button.setPreferredSize(new Dimension(100, 30));
    secondLine.add(button);

    header.add(firstLine, java.awt.BorderLayout.NORTH);
    header.add(secondLine, java.awt.BorderLayout.SOUTH);

    reader.getContentPane().add(header, java.awt.BorderLayout.NORTH);

    // set default opened file
    reader.setCurrentFile("110004336_06.pdf");
    reader.showAllPages();
    reader.setVisible(true);
}

private void showAllPages() {
    try {
        Field pages = getClass().getSuperclass().getDeclaredField("pages");
        pages.setAccessible(true);
        List<PDPage> pagesList = (List<PDPage>) pages.get(this);

        Field documentPanel =
getClass().getSuperclass().getDeclaredField("documentPanel");
        documentPanel.setAccessible(true);
        JPanel panel = (JPanel) documentPanel.get(this);
        panel.remove(0);
        GridLayout layout = new GridLayout(0, 1);
        panel.setLayout(layout);
        for(PDPage page : pagesList) {
            PageWrapper wrapper = new PageWrapper(this);
            wrapper.displayPage(page);
            panel.add(wrapper.getPanel());
        }
        pack();
    } catch(Exception e) {
        e.printStackTrace();
    }
}
}


OUTPUT :

1

2

java.lang.reflect.InvocationTargetException

3

            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

4

            at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

            at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

            at java.lang.reflect.Method.invoke(Method.java:498)

            at SimpleApplication.setCurrentFile(SimpleApplication.java:34)

            at SimpleApplication.main(SimpleApplication.java:71)

Caused by: java.lang.NoClassDefFoundError:
org/apache/commons/logging/LogFactory

            at
org.apache.pdfbox.pdmodel.PDDocument.<clinit>(PDDocument.java:97)

            at org.apache.pdfbox.PDFReader.parseDocument(PDFReader.java:393)

            at org.apache.pdfbox.PDFReader.openPDFFile(PDFReader.java:330)

            ... 6 more

Caused by: java.lang.ClassNotFoundException:
org.apache.commons.logging.LogFactory

            at java.net.URLClassLoader.findClass(URLClassLoader.java:382)

            at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

            at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)

            at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

            ... 9 more

java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0

            at java.awt.Container.remove(Container.java:1205)

            at SimpleApplication.showAllPages(SimpleApplication.java:88)

            at SimpleApplication.main(SimpleApplication.java:73)

BUILD SUCCESSFUL (total time: 5 seconds)

Re: Regarding pdfbox

[Tilman Hausherr <TH...@t-online.de>]

Am 16.05.2019 um 16:19 schrieb gaurav mundhada:
> Caused by: java.lang.NoClassDefFoundError:
> org/apache/commons/logging/LogFactory


Commons logging is not installed. See also:

https://pdfbox.apache.org/2.0/dependencies.html

or

https://pdfbox.apache.org/1.8/dependencies.html

depending on what version you are using. I suspect you are using 1.8, 
which is somewhat outdated. For 2.0, get the source code and look at 
PDFDebugger.

Tilman


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