PdfBox encode symbol currency euro

问题

I created a PDF document with the Apache PDFBox library. My problem is to encode the euro currency symbol when drawing a string on the page, because the base font Helvetica does not provide this character. How I can convert the output "þÿ ¬" to the symbol "€"?.

回答1:

Unfortunately PDFBox's String encoding is far from perfect yet (version 1.8.x). Unfortunately it uses the same routines when encoding strings in generic PDF objects as when encoding strings in content streams which is fundamentally wrong. Thus, instead of using PDPageContentStream.drawString (which uses that wrong encodings), you have to translate to the correct encoding yourself.

E.g. instead of using

    contentStream.beginText();
    contentStream.setTextMatrix(100, 0, 0, 100, 50, 100);
    contentStream.setFont(PDType1Font.HELVETICA, 2);
    contentStream.drawString("€");
    contentStream.endText();
    contentStream.close();

which results in

you could use some like

    contentStream.beginText();
    contentStream.setTextMatrix(100, 0, 0, 100, 50, 100);
    contentStream.setFont(PDType1Font.HELVETICA, 8);
    byte[] commands = "(x) Tj ".getBytes();
    commands[1] = (byte) 128;
    contentStream.appendRawCommands(commands);
    contentStream.endText();
    contentStream.close();

resulting in

If you wonder how I got to use 128 as byte code for the €, have a look at the PDF specification ISO 32000-1, annex D.2, Latin Character Set and Encodings which indicates an octal value 200 (decimal 128) for the € symbol in WinAnsiEncoding.

PS: An alternative approach has meanwhile been presented by other answers which in case of the € symbol amounts to something like:

    contentStream.beginText();
    contentStream.setTextMatrix(100, 0, 0, 100, 50, 100);
    contentStream.setFont(PDType1Font.HELVETICA, 8);
    contentStream.drawString(String.valueOf(Character.toChars(EncodingManager.INSTANCE.getEncoding(COSName.WIN_ANSI_ENCODING).getCode("Euro"))));
    contentStream.endText();
    contentStream.close();

This indeed also draws the '€' symbol. But even though this approach looks cleaner (it does not use byte arrays, it does not construct an actual PDF stream operation manually), it is dirty in its own way:

To use a broken method, it actually breaks its string argument in just the right way to counteract the bug in the method.

Thus, if the PDFBox people decided to fix the broken PDFBox method, this seemingly clean work-around code here would start to fail as it would then feed the fixed method broken input data.

Admittedly, I doubt they will fix this bug before 2.0.0 (and in 2.0.0 the fixed method has a different name), but one never knows...

回答2:

This worked for me:

char symbol = '€';

Encoding e = EncodingManager.INSTANCE.getEncoding(COSName.WIN_ANSI_ENCODING);

String toPDF = String.valueOf(Character.toChars(e.getCode(e.getNameFromCharacter(symbol))));`

回答3:

A created a solution of the many:

        String text = "Lorem ipsum dolor sit amet, consectetur adipisici € 1.234,56 " +
                "elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua.";

        contentStream.beginText();
        contentStream.setFont(font, 12);
        contentStream.moveTextPositionByAmount(10, 500);

        char[] tc = text.toCharArray();
        StringBuilder te = new StringBuilder();
        Encoding e =
                EncodingManager.INSTANCE.getEncoding(COSName.WIN_ANSI_ENCODING);           
        for (int i = 0; i < tc.length; i++) {
            Character c = tc[i];
            int code = 0;
            if(Character.isWhitespace(c)){
                code = e.getCode("space");
            }else{
                code = e.getCode(e.getNameFromCharacter(c));
            }               
            te.appendCodePoint(code);
        }
        contentStream.drawString( te.toString() );
        contentStream.endText();
        contentStream.close();

For the character space it's unknown code beacause the name "spacehackarabic" not described into the WinAnsiEncoding, I do not know why returns this name. Anyway I have verifier the character spaces, but it's possible also mapping this name with equivalent code space:

e.addCharacterEncoding( 040, "spacehackarabic" );

Thanks...

回答4:

Maybe is too late, but I did it using:

String toPDF = String.valueOf(Character.toChars(e.getCode("Euro")));

Make sure you put uppercase "E", if you do "euro" throws an error. Please take a look of this link it help me a lot http://partners.adobe.com/public/developer/en/opentype/glyphlist.txt

来源：https://stackoverflow.com/questions/22260344/pdfbox-encode-symbol-currency-euro

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java

pdfbox