Java为PDF文档加密

没有废话。

maven依赖

            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.5.13</version>
            </dependency>

            <dependency>
                <groupId>org.bouncycastle</groupId>
                <artifactId>bcprov-jdk15on</artifactId>
                <version>1.47</version>
            </dependency>

代码

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileOutputStream;

public class PdfEncry {

    public static void main(String[] args) {
        String srcPath = "C:\\D\\1.pdf";
        String destPath = "C:\\D\\1-1.pdf";
        String passWd = "2048";
        encrypt(srcPath, destPath, passWd);
    }

    private static void encrypt(String srcPath, String destPath, String passWd) {
        try {
            PdfReader srcReader = new PdfReader(srcPath);
            PdfStamper destStamper = new PdfStamper(srcReader, new FileOutputStream(destPath));
            destStamper.setEncryption(passWd.getBytes(), passWd.getBytes(),
                    PdfWriter.ALLOW_PRINTING, PdfWriter.ENCRYPTION_AES_128);
            destStamper.close();
            srcReader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}