java 获取doc、pdf等文档页数

可以使用Apache PDFBox库来获取PDF文档的页数，使用Apache POI库来获取Word文档的页数。

获取PDF文档页数的示例代码：

import org.apache.pdfbox.pdmodel.PDDocument;

import java.io.File;
import java.io.IOException;

public class PdfPageCount {
    public static void main(String[] args) throws IOException {
        File file = new File("example.pdf");
        PDDocument document = PDDocument.load(file);
        int pageCount = document.getNumberOfPages();
        System.out.println("Page count: " + pageCount);
        document.close();
    }
}

获取Word文档页数的示例代码：

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.xmlbeans.XmlException;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class WordPageCount {
    public static void main(String[] args) throws IOException, InvalidFormatException, XmlException {
        File file = new File("example.docx");
        FileInputStream fis = new FileInputStream(file);
        XWPFDocument document = new XWPFDocument(fis);
        int pageCount = document.getProperties().getExtendedProperties().getUnderlyingProperties().getPages();
        System.out.println("Page count: " + pageCount);
        document.close();
    }
}