以下是使用Windings字体的方法：

Here is how you can do it using Windings font:

BaseFont base = BaseFont.createFont("C:\\Winodws\\fonts\\wingding_0.ttf", BaseFont.IDENTITY_H, false);
Font font = new Font(base, 16f, Font.BOLD);
char checked='\u00FE';
char unchecked='\u00A8';

Document document = new Document();

PdfWriter.getInstance(document, new FileOutputStream(filename));

document.open();
// Here is how to add a checked checkbox
document.add(new Paragraph(String.valueOf(checked),font));
Here is an unchecked checkbox
document.add(new Paragraph(String.valueOf(unchecked),font));

document.close();

如果你想添加任何额外的字符，只需引用Windings字符集： http://www.alanwood.net/demos/wingdings.html

If you want to add any extra character, just reference the Windings character set: http://www.alanwood.net/demos/wingdings.html