java 实现 PDF 转 TIF 【彩色压缩版】

水深无声 2022-11-25 13:08 108阅读 0赞

## maven依赖 ##

<dependency>
                <groupId>com.sun.media</groupId>
                <artifactId>jai_codec</artifactId>
                <version>1.1.3</version>
            </dependency>
            <dependency>
                <groupId>javax.media</groupId>
                <artifactId>jai_core</artifactId>
                <version>1.1.3</version>
            </dependency>
            <dependency>
                <groupId>org.icepdf.os</groupId>
                <artifactId>icepdf-core</artifactId>
                <version>6.2.2</version>
            </dependency>
            <dependency>
                <groupId>javax.media</groupId>
                <artifactId>jai_imageio</artifactId>
                <version>1.1</version>
            </dependency>

## 实现代码 ##

import java.nio.file.Files;
    import com.sun.media.jai.codec.ImageCodec;
    import com.sun.media.jai.codec.ImageEncoder;
    import com.sun.media.jai.codec.TIFFEncodeParam;
    import org.icepdf.core.pobjects.Document;
    import org.icepdf.core.pobjects.Page;
    import org.icepdf.core.util.GraphicsRenderingHints;

public static List<byte[]> pdf2tifColorList(byte[] data){ 
            List<byte[]> bytes = new ArrayList<>();
            Document document = new Document();
            try { 
                document.setByteArray(data,0,data.length,"");
                float rotation = 0f;
                for (int i = 0; i < document.getNumberOfPages(); i++) { 
                    BufferedImage image = (BufferedImage) document.getPageImage(i,
                            GraphicsRenderingHints.SCREEN, Page.BOUNDARY_CROPBOX,
                            rotation, (float) 3.0);
                    BufferedImage bufferedImage = new BufferedImage(
                            image.getWidth(null), image.getHeight(null),
                            BufferedImage.TYPE_INT_RGB);
                    bufferedImage.getGraphics().drawImage(image, 0, 0, null);
    
                    TIFFEncodeParam param = new TIFFEncodeParam();
                    param.setCompression(TIFFEncodeParam.COMPRESSION_JPEG_TTN2);
                    ByteArrayOutputStream out = new ByteArrayOutputStream(OmsConstants.Number.ONE_MB);
                    ImageEncoder enc = ImageCodec.createImageEncoder("TIFF", out,
                            param);
                    enc.encode(bufferedImage);
                    image.flush();
                    out.close();
                    bytes.add(out.toByteArray());
                }
                document.dispose();
            } catch (Exception e) { 
                e.printStackTrace();
            }
            return bytes;
        }
    
        public static void main(String[] args) { 
            File file = new File("D:/PDF/bb.pdf");
            try { 
                List<byte[]> list = pdf2tifColorList(Files.readAllBytes(file.toPath())); 
    	        int i = 1;
    	        for(byte[] b : list){ 
    	            FileOutputStream ou = new FileOutputStream(new File("D:/PDF/" + i + ".tif"));
    	            ou.write(b);
    	            ou.flush();
    	            i++;
    	        }
            }catch (Exception e){ 
                e.printStackTrace();
            }
        }

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