pdf转tiff

概述

基于Java，将pdf转成单一的tiff文件。

MAVEN依赖

<groupId>com.sun.media</groupId>

    <artifactId>jai_codec</artifactId>

    <version>1.1-mr</version>

</dependency>

<dependency>

    <groupId>javax.media</groupId>

    <artifactId>jai_core</artifactId>

    <version>1.1-mr</version>

</dependency>

<dependency>

    <groupId>com.sun.medialib</groupId>

    <artifactId>mlibwrapper_jar</artifactId>

    <version>1.1</version>

</dependency>

<dependency>

    <groupId>org.apache.pdfbox</groupId>

    <artifactId>pdfbox</artifactId>

    <version>2.0.0-RC2</version>

</dependency>

部分依赖在maven中心仓库中找不到，现提供统一的压缩文件：依赖下载。

实现

类图

Pdf2TiffConstant

Pdf2TiffUtil

代码

Pdf2TiffConstant

package cn.ljl.javaweb.demo.pdf2tiff;

public class Pdf2TiffConstant {

    /** 图片格式 */

    public static final String IMG_FORMAT = "tiff";

    /** 打印精度设置 */

    public static final int DPI = 160; //图片的像素

}

Pdf2TiffUtil

package cn.ljl.javaweb.demo.pdf2tiff;

import static cn.ljl.javaweb.demo.pdf2tiff.Pdf2TiffConstant.DPI;

import static cn.ljl.javaweb.demo.pdf2tiff.Pdf2TiffConstant.IMG_FORMAT;

import java.awt.image.BufferedImage;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.ArrayList;

import java.util.List;

import javax.media.jai.JAI;

import javax.media.jai.PlanarImage;

import org.apache.pdfbox.pdmodel.PDDocument;

import org.apache.pdfbox.rendering.ImageType;

import org.apache.pdfbox.rendering.PDFRenderer;

import com.sun.media.jai.codec.ImageCodec;

import com.sun.media.jai.codec.ImageEncoder;

import com.sun.media.jai.codec.TIFFEncodeParam;

public class Pdf2TiffUtil {

    /**

     * 从输入流读取pdf，转化为tiff后写入输出流.<br/>

     * 参考列表：

     * <ol>

     * <li><a href=

     * "http://www.coderanch.com/t/497492/java/java/Convert-PDF-files-Tiff-files"

     * >Convert PDF files to Tiff files</a></li>

     * <li><a href=

     * "http://www.oracle.com/technetwork/cn/java/javaee/downloads/readme-1-1-2-137176.html"

     * >Java(TM) Advanced Imaging API README</a></li>

     * </ol>

     *

     * @param is

     *            输入流，提供pfg内容.

     * @param os

     *            输出流.

     */

    public static void pdf2Tiff(InputStream is, OutputStream os) {

        PDDocument doc = null;

        try {

            doc = PDDocument.load(is);

            int pageCount = doc.getNumberOfPages();

            PDFRenderer renderer = new PDFRenderer(doc); // 根据PDDocument对象创建pdf渲染器

            List<PlanarImage> piList = new ArrayList<PlanarImage>(pageCount - 1);

            for (int i = 0 + 1; i < pageCount; i++) {

                BufferedImage image = renderer.renderImageWithDPI(i, DPI,

                        ImageType.RGB);

                PlanarImage pimg = JAI.create("mosaic", image);

                piList.add(pimg);

            }

            TIFFEncodeParam param = new TIFFEncodeParam();// 创建tiff编码参数类

            param.setCompression(TIFFEncodeParam.COMPRESSION_DEFLATE);// 压缩参数

            param.setExtraImages(piList.iterator());// 设置图片的迭代器

            BufferedImage fimg = renderer.renderImageWithDPI(0, DPI,

                    ImageType.RGB);

            PlanarImage fpi = JAI.create("mosaic", fimg); // 通过JAI的create()方法实例化jai的图片对象

            ImageEncoder enc = ImageCodec.createImageEncoder(IMG_FORMAT, os,

                    param);

            enc.encode(fpi);// 指定第一个进行编码的jai图片对象,并将输出写入到与此

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            try {

                if (doc != null)

                    doc.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }

}

参考索引

1. Convert PDF files to Tiff files
2. Java(TM) Advanced Imaging API README