java检测对应字体文件中包含的字符全集

1、引入pom

itext       : '7.1.9'

implementation "com.itextpdf:kernel:${versions.itext}"
implementation "com.itextpdf:io:${versions.itext}"
implementation "com.itextpdf:layout:${versions.itext}"
implementation "com.itextpdf:forms:${versions.itext}"
implementation "com.itextpdf:font-asian:${versions.itext}"
implementation "com.itextpdf:html2pdf:${versions.itext}"

2、核心的实现

public void printAllchar() throws IOException {
        String fontPath = "C:\\Users\\fengqingyang\\Desktop\\仿宋_GB2312.TTF";
        try {
            // 加载字体
            FontProgram fontProgram = FontProgramFactory.createFont(fontPath);
            PdfFont font = PdfFontFactory.createFont(fontProgram, PdfEncodings.IDENTITY_H);

            // 获取字体支持的Unicode字符集
            for (int code = 0; code <= Character.MAX_CODE_POINT; code++) {
                if (fontProgram.getGlyph(code) != null) {
                    char character = (char) code;
                    System.out.println("Supported character: " + character + " Code: " + code);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }