如何使用iText替换PDF中的文本而没有编码问题? (安卓) [英] How can I replace text in PDF with iText without encoding issue? (Android)

问题描述

我需要一些帮助.我想用PDF文件中的另一个替换文本(我正在使用iText库)，但是当我尝试使用带重音符号的字母时，它存在编码问题.

I need some help. I want to replace a text with an another in a PDF file (I'm using iText library), but when I'm trying to do it with accent letters, it has encoding problems.

public static void manipulatePdf(String src, String dest) throws IOException, DocumentException {
    PdfReader reader = new PdfReader(src);
    PdfDictionary dict = reader.getPageN(1);
    PdfObject object = dict.getDirectObject(PdfName.CONTENTS);
    if (object instanceof PRStream) {
        PRStream stream = (PRStream) object;
        byte[] data = PdfReader.getStreamBytes(stream);


        String eredeti = "öüóá";
        final String s = new String(eredeti.getBytes(), BaseFont.CP1250);

        stream.setData(new String(data).replace("Hello World", s).getBytes());
    }
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
    stamper.close();
    reader.close();
}

但是当我打开PDF文件时，会看到以下内容: 错误的PDF

But when I open the PDF file, I see this: Wrong PDF

我已经尝试了所有编码类型，以获取正确的字母(öüóá)，但是它对我没有用.

I've already tried all encoding types, to get the right letters (öüóá), but it never worked for me.

有人知道我该怎么办吗?

Has anybody any idea what should I do ?

推荐答案

我已经找到了解决方案;)

I already found the solution ;)

问题在于，在将字符串放入PDF文件之前，我已经对其进行了编码.完全将其放入PDF时，应该对字符串进行编码，如下所示:

The problem was that, I have encoded the string before I put it into the PDF file. You should encode your string when exactly you put it into the PDF, just like here:

    stream.setData(new String(data).replace("Hello World", s).getBytes("ISO-8859-2"));

您可以在此处查看我的代码的最终形式:

You can see the final form of my code here:

public static void manipulatePdf(String src, String dest) throws IOException, DocumentException {
    PdfReader reader = new PdfReader(src);
    PdfDictionary dict = reader.getPageN(1);
    PdfObject object = dict.getDirectObject(PdfName.CONTENTS);
    if (object instanceof PRStream) {
        PRStream stream = (PRStream) object;
        byte[] data = PdfReader.getStreamBytes(stream);


        String eredeti = "öűóá";
        final String s = new String(eredeti.getBytes());

        stream.setData(new String(data).replace("Hello World", s).getBytes("ISO-8859-2"));
    }
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
    stamper.close();

    Paragraph preface = new Paragraph();
    preface.setAlignment(Element.ALIGN_CENTER);

    reader.close();
}

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