我想将pdf第一页作为jpg图像获取。该程序向我显示了一些错误：
Apr 18, 2016 1:18:40 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: BDC
Apr 18, 2016 1:18:40 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: EMC
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/fontbox/afm/AFMParser
at org.apache.pdfbox.pdmodel.font.PDFont.addAdobeFontMetric(PDFont.java:165)
at org.apache.pdfbox.pdmodel.font.PDFont.addAdobeFontMetric(PDFont.java:152)
at org.apache.pdfbox.pdmodel.font.PDFont.getAdobeFontMetrics(PDFont.java:122)
at org.apache.pdfbox.pdmodel.font.PDFont.<clinit>(PDFont.java:114)
at org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:108)
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 org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:732)
at Main.main(Main.java:26)
Caused by: java.lang.ClassNotFoundException: org.apache.fontbox.afm.AFMParser
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 16 more
Main.java:26: BufferedImage image = firstPage.convertToImage();
是否有可能使用PDFBox将第一页作为图像？
完整代码：
try {
String sourceDir = "/home/linux/Downloads/test.pdf";
String destinationDir = "/home/linux/Downloads/testImage";
File sourceFile = new File(sourceDir);
File destinationFile = new File(destinationDir);
PDDocument document = PDDocument.load(sourceDir);
PDPage firstPage = (PDPage) document.getDocumentCatalog().getAllPages().get(1);
String fileName = sourceFile.getName().replace(".pdf", "");
BufferedImage image = firstPage.convertToImage();
ImageIO.write(image , "jpg", new File(destinationDir +fileName+"_"+".jpg"));
document.close();
} catch (Exception e) {
e.printStackTrace();
}
我只需将第一页解析为图像。