java - Apache PDFBox 和 CodenameOne 桌面应用程序

Question

我有一个 CodenameOne 项目已基本完成，我需要将桌面版本与 PDFBox 集成。我正在尝试打开文档并将页面渲染到我在应用程序中显示的图像。

我收到以下错误:

java.lang.NoClassDefFoundError: Could not initialize class org.apache.pdfbox.pdmodel.font.PDTrueTypeFont
    at org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:100)
    at org.apache.pdfbox.pdmodel.PDResources.getFonts(PDResources.java:213)
    at org.apache.pdfbox.util.PDFStreamEngine.getFonts(PDFStreamEngine.java:607)
    at org.apache.pdfbox.util.operator.SetTextFont.process(SetTextFont.java:59)
    at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:557)
    at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
    at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
    at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
    at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:139)
    at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:801)
    at co.za.gingetsuryuu.pdfreader.PDFInterfaceImpl$1.run(PDFInterfaceImpl.java:69)
    at java.lang.Thread.run(Thread.java:745)
java.lang.NoClassDefFoundError: Could not initialize class org.apache.pdfbox.pdmodel.font.PDTrueTypeFont
    at org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:100)
    at org.apache.pdfbox.pdmodel.PDResources.getFonts(PDResources.java:213)
    at org.apache.pdfbox.util.PDFStreamEngine.getFonts(PDFStreamEngine.java:607)
    at org.apache.pdfbox.util.operator.SetTextFont.process(SetTextFont.java:59)
    at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:557)
    at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
    at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
    at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
    at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:139)
    at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:801)
    at co.za.gingetsuryuu.pdfreader.PDFInterfaceImpl$1.run(PDFInterfaceImpl.java:69)
    at java.lang.Thread.run(Thread.java:745)
java.lang.NoClassDefFoundError: Could not initialize class org.apache.pdfbox.pdmodel.font.PDTrueTypeFont
    at org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:100)
    at org.apache.pdfbox.pdmodel.PDResources.getFonts(PDResources.java:213)
    at org.apache.pdfbox.util.PDFStreamEngine.getFonts(PDFStreamEngine.java:607)
    at org.apache.pdfbox.util.operator.SetTextFont.process(SetTextFont.java:59)
    at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:557)
    at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
    at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
    at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
    at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:139)
    at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:801)
    at co.za.gingetsuryuu.pdfreader.PDFInterfaceImpl$1.run(PDFInterfaceImpl.java:69)
    at java.lang.Thread.run(Thread.java:745)

我彻底迷失了。我已经检查过库是否包含在内，它能够渲染一两个页面，但仅此而已。我什至检查过该函数确实存在，而且确实存在。

Answer 1

问题似乎出在 Codename One 构建过程的方式上。通过将 jar 文件包含在结果项目中并使它们在 jar 加载顺序中加载得比 app.jar 文件更高，问题就得到了解决。