Java PDF查看器

Z时代
2024-01-10
分类：问答

我正在使用Java和RCP，并且尝试在Acrobat上显示pdf文档。我不需要更改它们。我的这段代码有这个错误。任何想法如何解决这个问题？附言：它同时运作良好。

PDFFile pdfFile;
pdfFile = PdfFileLoader.loadPdf(file, new NullProgressMonitor());
PdfDocument pdfDocument = new OneDimensionalPdfDocument(pdfFile, new NullProgressMonitor());
pdfViewer.setPdfDocument(pdfDocument);
Error from PdfDocument pdfDocument = new OneDimensionalPdfDocument(pdfFile, new NullProgressMonitor()) : Unsupport CMap format: 6
java.nio.BufferUnderflowException
at java.nio.Buffer.nextGetIndex(Unknown Source)
at java.nio.HeapByteBuffer.getShort(Unknown Source)
at com.sun.pdfview.font.ttf.HmtxTable.setData(HmtxTable.java:79)
at com.sun.pdfview.font.ttf.TrueTypeTable.createTable(TrueTypeTable.java:113)
at com.sun.pdfview.font.ttf.TrueTypeFont.getTable(TrueTypeFont.java:106)
at com.sun.pdfview.font.TTFFont.getOutline(TTFFont.java:129)
at com.sun.pdfview.font.TTFFont.getOutline(TTFFont.java:89)
at com.sun.pdfview.font.OutlineFont.getGlyph(OutlineFont.java:118)
at com.sun.pdfview.font.PDFFont.getCachedGlyph(PDFFont.java:307)
at com.sun.pdfview.font.PDFFontEncoding.getGlyphFromEncoding(PDFFontEncoding.java:132)
at com.sun.pdfview.font.PDFFontEncoding.getGlyphs(PDFFontEncoding.java:98)
at com.sun.pdfview.font.PDFFont.getGlyphs(PDFFont.java:273)
at com.sun.pdfview.PDFTextFormat.doText(PDFTextFormat.java:283)
at com.sun.pdfview.PDFParser.iterate(PDFParser.java:742)
at com.sun.pdfview.BaseWatchable.run(BaseWatchable.java:88)
at java.lang.Thread.run(Unknown Source)

问候，Haythem

回答：

看看这些免费的pdf渲染器…

一些链接…

http://www.icepdf.org/（现在位于http://www.icesoft.org/java/projects/ICEpdf/overview.jsf-Apache 2 Open Source）

http://www.jpedal.org/support_siEclipse.php（现在位于https://www.idrsolutions.com/jpedal/-商业）

https://java.net/projects/pdf-renderer（仍可用https://github.com/yarick123/pdf-renderer-LGPL-2.1）

根据http://www.icepdf.org/，

ICEpdf是一个开源Java PDF引擎，可以在任何Java应用程序内或Web服务器上呈现，转换或提取PDF内容。

对于基本功能，您必须在类路径中包含icepdf-core.jar和icepdf-viewer.jar。根据要求，您还可以添加SVG支持。

取自iceface示例文件夹：

import org.icepdf.ri.common.SwingController;
import org.icepdf.ri.common.SwingViewBuilder;
import javax.swing.*;
/**
 * The <code>ViewerComponentExample</code> class is an example of how to use
 * <code>SwingController</code> and <code>SwingViewBuilder</code>
 * to build a PDF viewer component.  A file specified at the command line is
 * opened in a JFrame which contains the viewer component.
 *
 * @since 2.0
 */
public class ViewerComponentExample {
    public static void main(String[] args) {
        // Get a file from the command line to open
        String filePath = args[0];
        // build a component controller
        SwingController controller = new SwingController();
        SwingViewBuilder factory = new SwingViewBuilder(controller);
        JPanel viewerComponentPanel = factory.buildViewerPanel();
        // add interactive mouse link annotation support via callback
        controller.getDocumentViewController().setAnnotationCallback(
                new org.icepdf.ri.common.MyAnnotationCallback(
                        controller.getDocumentViewController()));
        JFrame applicationFrame = new JFrame();
        applicationFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        applicationFrame.getContentPane().add(viewerComponentPanel);
        // Now that the GUI is all in place, we can try openning a PDF
        controller.openDocument(filePath);
        // show the component
        applicationFrame.pack();
        applicationFrame.setVisible(true);
    }
}