Converting html file to pdf using iText in JApplet

问题

I am using iText for a project. My program is supposed to run from inside a browser and I need it to convert an html file to a pdf file. When I run the program from NetBeans everything works fine. I sign my jar and run the Applet in a browser and then I get this error:

Errorjava.security.AccessControlException: access denied ("java.lang.RuntimePermission" "getenv.windir")

For the purpose of this post I have made a simple JApplet code which has the same problem:

public class RunApplet extends JApplet {

    @Override
    public void init() {
        this.add(new JLabel("This is a labe"));
        File f = new File("C:/ReportGen/data.html");
        File pdf = new File("C:/ReportGen/data.pdf");

        try {
            pdf.createNewFile();
            Document pdfDocument = new Document();
            PdfWriter writer = PdfWriter.getInstance(pdfDocument, new FileOutputStream(pdf));
            pdfDocument.open();

            XMLWorkerHelper worker = XMLWorkerHelper.getInstance();

            FontFactoryImp imp = new FontFactoryImp();
            imp.getFont("Arial");
            FontFactory.setFontImp(imp);

            worker.parseXHtml(writer, pdfDocument, new FileInputStream(f));

            pdfDocument.close();
            writer.close();
            this.add(new JLabel(f.getAbsolutePath()));

        } catch (Exception ex) {
            this.add(new JTextField("Error"+ex));
        }                       
    }
}

The html file is created and is fine, but when I create the pdf file I get the exception and the pdf file is actually created, but is corrupt and I am unable to open it. Thanks in advance for your time.

回答1:

First, I see this error in your question:

Errorjava.security.AccessControlException: access denied ("java.lang.RuntimePermission" "getenv.windir")

You need signed your applet for access to your filesystem. See this link and this too.

Second, I have tried following code:

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.XMLWorkerHelper;

public class main {

    public static void main(String[] args) {
        File f = new File("C:/tmp/data.htm");

        File pdf = new File("C:/tmp/data.pdf");
        Document pdfDocument = null;
        PdfWriter pdfWriter = null;
        try {

            pdfDocument = new Document();
            pdfWriter = PdfWriter.getInstance(pdfDocument, new FileOutputStream(pdf));
            pdfDocument.open();

            XMLWorkerHelper.getInstance().parseXHtml(pdfWriter, pdfDocument,
                    new FileInputStream(f));
            pdfDocument.close();

        } catch (Exception ex) {
            ex.printStackTrace();
        }

    }
}

If file data.htm (original data) is an htmlx, work fine. But if data.htm not is an xml, i get this error:

com.itextpdf.tool.xml.exceptions.RuntimeWorkerException: Invalid nested tag head found, expected closing tag meta.
    at com.itextpdf.tool.xml.XMLWorker.endElement(XMLWorker.java:134)
    at com.itextpdf.tool.xml.parser.XMLParser.endElement(XMLParser.java:395)
    at com.itextpdf.tool.xml.parser.state.ClosingTagState.process(ClosingTagState.java:70)
    at com.itextpdf.tool.xml.parser.XMLParser.parseWithReader(XMLParser.java:235)
    at com.itextpdf.tool.xml.parser.XMLParser.parse(XMLParser.java:213)
    at com.itextpdf.tool.xml.parser.XMLParser.parse(XMLParser.java:174)
    at com.itextpdf.tool.xml.XMLWorkerHelper.parseXHtml(XMLWorkerHelper.java:220)
    at com.itextpdf.tool.xml.XMLWorkerHelper.parseXHtml(XMLWorkerHelper.java:185)
    at main.main(main.java:44)

Can you try with your data and with this example? The difference is that my example isn't an applet, is an java standalone.

Regards

来源：https://stackoverflow.com/questions/11644852/converting-html-file-to-pdf-using-itext-in-japplet

标签

java

pdf

itext