java 操作PDF工具 iText和Apache PDFBox_apache pdfbox和itext-优快云博客

本文链接：https://blog.youkuaiyun.com/nullsheep/article/details/143323686

1. iText

1.1 添加依赖。以Maven项目为例，可以在pom.xml中添加以下依赖：

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext7-core</artifactId>
    <version>7.1.15</version>
</dependency>

1.2 创建基本的PDF

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;

public class PdfGenerator {
    public static void main(String[] args) {
        String dest = "example.pdf";
        try {
            PdfWriter writer = new PdfWriter(dest);
            PdfDocument pdf = new PdfDocument(writer);
            Document document = new Document(pdf);
            
            document.add(new Paragraph("Hello, World!"));
            
            document.close();
            System.out.println("PDF Created!");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

1.3 添加图片和表格

import com.itextpdf.kernel.colors.Color;
import com.itextpdf.kernel.colors.DeviceRgb;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Image;
import com.itextpdf.layout.element.Table;
import com.itextpdf.layout.property.UnitValue;
import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;

public class PdfWithImageAndTable {
    public static void main(String[] args) {
        String dest = "example_with_image_and_table.pdf";
        try {
            PdfWriter writer = new PdfWriter(dest);
            PdfDocument pdf = new PdfDocument(writer);
            Document document = new Document(pdf, PageSize.A4);

            // 添加图片
            ImageData imageData = ImageDataFactory.create("path/to/image.jpg");
            Image image = new Image(imageData);
            document.add(image);

            // 添加表格
            float[] pointColumnWidths = {150F, 150F, 150F}; 
            Table table = new Table(UnitValue.createPointArray(pointColumnWidths));
            table.addCell("Header 1");
            table.addCell("Header 2");
            table.addCell("Header 3");
            table.addCell("Data 1");
            table.addCell("Data 2");
            table.addCell("Data 3");

            document.add(table);
            
            document.close();
            System.out.println("PDF with Image and Table Created!");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

1.4 高级功能：添加图表和水印

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.ui.ApplicationFrame;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Image;
import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import javax.imageio.ImageIO;

public class PdfWithChart {
    public static void main(String[] args) {
        String dest = "example_with_chart.pdf";
        try {
            // 创建图表
            XYSeries series = new XYSeries("Random Data");
            series.add(1, 1);
            series.add(2, 4);
            series.add(3, 3);
            XYSeriesCollection dataset = new XYSeriesCollection(series);
            JFreeChart chart = ChartFactory.createXYLineChart(
                "Sample Chart", 
                "X-Axis", 
                "Y-Axis", 
                dataset, 
                PlotOrientation.VERTICAL,
                true, 
                true, 
                false
            );

            // 将图表转换为图片
            BufferedImage bufferedImage = chart.createBufferedImage(500, 300);
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            ImageIO.write(bufferedImage, "png", byteArrayOutputStream);
            byte[] byteArray = byteArrayOutputStream.toByteArray();
            ImageData imageData = ImageDataFactory.create(byteArray);
            Image image = new Image(imageData);

            // 创建PDF并添加图表图片
            PdfWriter writer = new PdfWriter(dest);
            PdfDocument pdf = new PdfDocument(writer);
            Document document = new Document(pdf);
            document.add(image);
            
            document.close();
            System.out.println("PDF with Chart Created!");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;

public class PdfWithWatermark {
    public static void main(String[] args) {
    	/*添加水印*/
        String dest = "example_with_watermark.pdf";
        try {
            PdfWriter writer = new PdfWriter(dest);
            PdfDocument pdf = new PdfDocument(writer);
            Document document = new Document(pdf);

            document.add(new Paragraph("This is a test document with watermark."));

            // 添加水印
            int n = pdf.getNumberOfPages();
            PdfFont font = PdfFontFactory.createFont();
            for (int i = 1; i <= n; i++) {
                PdfPage page = pdf.getPage(i);
                Rectangle pageSize = page.getPageSizeWithRotation();
                PdfCanvas canvas = new PdfCanvas(page);
                canvas.saveState();
                canvas.beginText();
                canvas.setFontAndSize(font, 60);
                canvas.setColor(ColorConstants.GRAY, true);
                canvas.showTextAligned("CONFIDENTIAL", 
                    pageSize.getWidth() / 2, 
                    pageSize.getHeight() / 2, 
                    TextAlignment.CENTER, 
                    VerticalAlignment.MIDDLE, 
                    45);
                canvas.endText();
                canvas.restoreState();
            }
            
            document.close();
            System.out.println("PDF with Watermark Created!");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

2. PDFBox

2.1 添加依赖

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

2.2 创建基本的PDF

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDType1Font;

import java.io.IOException;

public class PdfBoxGenerator {
    public static void main(String[] args) {
        String dest = "pdfbox_example.pdf";
        try (PDDocument document = new PDDocument()) {
            PDPage page = new PDPage();
            document.addPage(page);
            
            try (PDPageContentStream contentStream = new PDPageContentStream(document, page)) {
                contentStream.beginText();
                contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12);
                contentStream.newLineAtOffset(100, 700);
                contentStream.showText("Hello, World with PDFBox!");
                contentStream.endText();
            }
            
            document.save(dest);
            System.out.println("PDF Created with PDFBox!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.3 添加图片和表格

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;

import java.io.IOException;

public class PdfBoxWithImage {
    public static void main(String[] args) {
        String dest = "pdfbox_with_image.pdf";
        try (PDDocument document = new PDDocument()) {
            PDPage page = new PDPage();
            document.addPage(page);
            
            // 添加图片
            PDImageXObject pdImage = PDImageXObject.createFromFile("path/to/image.jpg", document);
            try (PDPageContentStream contentStream = new PDPageContentStream(document, page)) {
                contentStream.drawImage(pdImage, 100, 600, pdImage.getWidth() / 2, pdImage.getHeight() / 2);
                
                // 添加表格
                contentStream.beginText();
                contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12);
                contentStream.newLineAtOffset(100, 500);
                contentStream.showText("Header 1\tHeader 2\tHeader 3");
                contentStream.newLine();
                contentStream.showText("Data 1\tData 2\tData 3");
                contentStream.endText();
            }
            
            document.save(dest);
            System.out.println("PDF with Image Created with PDFBox!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.4 合并PDF文件

import org.apache.pdfbox.multipdf.PDFMergerUtility;
import java.io.IOException;

public class PdfBoxMerge {
    public static void main(String[] args) {
        PDFMergerUtility mergerUtility = new PDFMergerUtility();
        mergerUtility.addSource("file1.pdf");
        mergerUtility.addSource("file2.pdf");
        mergerUtility.setDestinationFileName("merged.pdf");

        try {
            mergerUtility.mergeDocuments(null);
            System.out.println("PDFs Merged!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.5 添加注释

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationText;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationTextMarkup;

import java.awt.Color;
import java.io.IOException;

public class PdfBoxAnnotations {
    public static void main(String[] args) {
        String dest = "pdf_with_annotations.pdf";
        try (PDDocument document = new PDDocument()) {
            PDPage page = new PDPage();
            document.addPage(page);
            
            // 添加文本注释
            PDAnnotationText textAnnotation = new PDAnnotationText();
            textAnnotation.setContents("This is a text annotation.");
            textAnnotation.setRectangle(new PDRectangle(100, 700, 200, 20));
            page.getAnnotations().add(textAnnotation);

            // 添加高亮注释
            PDAnnotationTextMarkup highlight = new PDAnnotationTextMarkup(PDAnnotationTextMarkup.SUB_TYPE_HIGHLIGHT);
            highlight.setContents("Highlighted text");
            highlight.setRectangle(new PDRectangle(100, 650, 200, 20));
            highlight.setColor(new PDColor(new float[]{1, 1, 0}, PDDeviceRGB.INSTANCE));
            page.getAnnotations().add(highlight);
            
            document.save(dest);
            System.out.println("PDF with Annotations Created!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}