Java实现读取设置pdf属性信息

<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.24</version>
</dependency>

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentInformation;
 
import java.io.File;
import java.io.IOException;
 
public class ReadPDFProperties {
    public static void main(String[] args) {
        try {
            // 加载PDF文件
            File file = new File("example.pdf");
            PDDocument document = PDDocument.load(file);
 
            // 获取PDF文档信息
            PDDocumentInformation info = document.getDocumentInformation();
 
            // 读取属性
            String title = info.getTitle();
            String author = info.getAuthor();
            String subject = info.getSubject();
            String keywords = info.getKeywords();
            String creator = info.getCreator();
            String producer = info.getProducer();
            String creationDate = info.getCreationDate().toString();
            String modificationDate = info.getModificationDate().toString();
            String trapped = info.getTrapped();
 
            // 输出属性信息
            System.out.println("Title: " + title);
            System.out.println("Author: " + author);
            System.out.println("Subject: " + subject);
            System.out.println("Keywords: " + keywords);
            System.out.println("Creator: " + creator);
            System.out.println("Producer: " + producer);
            System.out.println("Creation Date: " + creationDate);
            System.out.println("Modification Date: " + modificationDate);
            System.out.println("Trapped: " + trapped);
 
            // 关闭文档
            document.close();
 
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentInformation;
 
import java.io.File;
import java.io.IOException;
 
public class PDFPropertiesExample {
    public static void main(String[] args) {
        try (PDDocument document = PDDocument.load(new File("example.pdf"))) {
            PDDocumentInformation info = document.getDocumentInformation();
            
            // 设置文档属性
            info.setAuthor("作者姓名");
            info.setTitle("文档标题");
            info.setSubject("文档主题");
            
            // 可以设置更多属性，例如：
            // info.setKeywords("关键词1, 关键词2");
            // info.setCreator("创建者应用名");
            // info.setProducer("生产者应用名");
            
            // 保存属性
            document.setDocumentInformation(info);
            
            // 保存更改后的文档
            document.save("updated_example.pdf");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}