PDF识别之XFA文件格式

不念不忘少年蓝@ 2023-10-13 19:56 45阅读 0赞

有些PDF文件是XFA文件格式，都是XML样式，这种PDF文件需要使用XFA读取方式，下面是JAVA实现方式

package com.xxx.xxx.util.pdf;
    
    import com.itextpdf.forms.PdfAcroForm;
    import com.itextpdf.forms.xfa.XfaForm;
    import com.itextpdf.kernel.pdf.PdfDocument;
    import com.itextpdf.kernel.pdf.PdfReader;
    
    import java.io.File;
    import java.io.FileOutputStream;
    import javax.xml.transform.OutputKeys;
    import javax.xml.transform.Transformer;
    import javax.xml.transform.TransformerFactory;
    import javax.xml.transform.dom.DOMSource;
    import javax.xml.transform.stream.StreamResult;
    
    import org.w3c.dom.Node;
    import org.w3c.dom.NodeList;
    /**
     * 读取XFA PDF文件，结果是XML文件
     * @author xxx
     *
     */
    public class ReadXFAUtil {
    
    	/**
         * 读取xfa pdf
         * @param str 
         * @throws Exception 
         */
        public static void manipulatePdf(String src,String dest) throws Exception {
            PdfDocument pdfDoc = new PdfDocument(new PdfReader(src));
            PdfAcroForm form = PdfAcroForm.getAcroForm(pdfDoc, true);
            XfaForm xfa = form.getXfaForm();
    
            // Get XFA data under datasets/data.
            Node node = xfa.getDatasetsNode();
            NodeList list = node.getChildNodes();
            for (int i = 0; i < list.getLength(); i++) {
                if ("data".equals(list.item(i).getLocalName())) {
                    node = list.item(i);
                    break;
                }
            }
    
            try (FileOutputStream os = new FileOutputStream(dest)) {
                Transformer transformer = TransformerFactory.newInstance().newTransformer();
                transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
                transformer.setOutputProperty(OutputKeys.INDENT, "yes");
                transformer.transform(new DOMSource(node), new StreamResult(os));
            }
    
            pdfDoc.close();
        }
        
        public static void main(String[] args) throws Exception {
            String src = "e:/4000-2021-6增值税申报表.pdf";
            String dest = "e:/1.xml";
    
            ReadXFAUtil.manipulatePdf(src,dest);
        }
    }

如有问题，请私信。

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