从RTF文件读取文本

Question

I tried to read rtf file using Apache POI but I found issues with it. It reports Invalid Header exception. It seems like POI doesn't support rtf files. Is there any way to read .rtf using any open source java API . (I heard about Aspose API but it's not free)

Any solutions??

Answer 1

You can try the RTFEditorKit . It supports images and text as well.

Or look at this answer: Java API to convert RTF file to Word document (97-2003 format)

There is no free library that supports this. But it may not be that hard to create a basic compare function yourself. You can read in an rtf file and then extract the text like this:

// read rtf from file
JEditorPane p = new JEditorPane();
p.setContentType("text/rtf");
EditorKit rtfKit = p.getEditorKitForContentType("text/rtf");
rtfKit.read(new FileReader(fileName), p.getDocument(), 0);
rtfKit = null;

// convert to text
EditorKit txtKit = p.getEditorKitForContentType("text/plain");
Writer writer = new StringWriter();
txtKit.write(writer, p.getDocument(), 0, p.getDocument().getLength());
String documentText = writer.toString();

Answer 2

The easiest way is to use the Scanner class in Java and the FileReader object. Simple example:

Scanner in = new Scanner(new FileReader("filename.rtf"));

Scanner has several methods for reading in strings, numbers, etc... You can look for more information on this on the Java documentation page.