pdf转tiff

<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>

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
}

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();
            }
        }
    }
}