使用iText处理PDF

  • iText was written by Bruno Lowagie.
  • 2007年，《SOA World》（SOA世界）杂志将iText作为企业应该使用的10种开源解决方案之一。詹姆斯·高斯林称赞iText库，并在Huckster的新版本使用。纽约时报还利用iText来创建其公共领域文章的PDF版本。
  • iText被嵌入在许多产品和服务中，包括Eclipse BIRT、Jasper Reports、Red Hat JBoss Seam、Windward Reports、pdftk等等。
  • 2008年末，iText的专有许可证可用；2009年初，iText软件公司成立，成为iText产品的全球许可方。

HTML转PDF

加密码

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package com.xiongjiaxuan;

import com.itextpdf.kernel.pdf.EncryptionConstants;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.WriterProperties;

import java.io.FileOutputStream;
import java.io.IOException;

/**
 * Created by xiongjiaxuan on 2022/1/12 18:25
 */
public class Password {

  public static final String SRC = "./src/main/resources/总表.pdf";
  public static final String DEST = "./target/output/password.pdf";

  private static final byte[] USERPASS = "user".getBytes(); // 可读
  private static final byte[] OWNERPASS = "owner".getBytes(); // 可读写

  public static void main(String[] args) throws IOException
  {
    PdfReader pdfReader = new PdfReader(SRC);
    WriterProperties writerProperties = new WriterProperties();
    writerProperties.setStandardEncryption(USERPASS, OWNERPASS, EncryptionConstants.ALLOW_PRINTING, EncryptionConstants.ENCRYPTION_AES_128);
    PdfWriter pdfWriter = new PdfWriter(new FileOutputStream(DEST), writerProperties);
    PdfDocument pdfDocument = new PdfDocument(pdfReader, pdfWriter);
    pdfDocument.close();
  }

}

依赖

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<dependency>
  <groupId>com.itextpdf</groupId>
  <artifactId>itext7-core</artifactId>
  <version>7.1.9</version>
  <type>pom</type>
</dependency>
<dependency>
  <groupId>org.bouncycastle</groupId>
  <artifactId>bcprov-jdk15on</artifactId>
  <version>1.69</version>
</dependency>

参考

顺时针旋转90度

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package com.xiongjiaxuan;

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;

import java.io.File;

/**
 * Created by xiongjiaxuan on 2022/1/12 17:29
 */
public class Rotate {

  public static final String DEST = "./target/output/rotate90.pdf";
  public static final String SRC = "./src/main/resources/总表.pdf";

  public static void main(String[] args) throws Exception {
    File file = new File(DEST);
    file.getParentFile().mkdirs();

    PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(DEST));
    PdfPage page = pdfDoc.getPage(1);
    int rotate = page.getRotation();
    if (rotate == 0) {
      page.setRotation(90);
    } else { // 存在角度
      page.setRotation((rotate + 90) % 360);
    }
    pdfDoc.close();
  }

}

依赖

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<dependency>
  <groupId>com.itextpdf</groupId>
  <artifactId>itext7-core</artifactId>
  <version>7.1.9</version>
  <type>pom</type>
</dependency>

参考

References

Bruno Lowagie - Stack Exchange