多页单个tif文件转换为多个jpg文件

（转）http://wangminger.iteye.com/blog/1134106

package org.tif;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.ParameterBlock;
import java.io.File;
import java.io.IOException;
import javax.media.jai.JAI;
import com.sun.media.jai.codec.FileSeekableStream;
import com.sun.media.jai.codec.ImageCodec;
import com.sun.media.jai.codec.ImageDecoder;
import com.sun.media.jai.codec.JPEGEncodeParam;
import com.sun.media.jai.codec.TIFFDecodeParam;
import com.sun.media.jai.codec.TIFFEncodeParam;
/**
* 读取tif图片的一张.tif有几页
*
*/
public class ReadTifPage {
private static final String path = System.getProperty("user.dir")
+ "\src\org\tif\tif_images.tif";
public static void main(String[] args) throws Exception {
//readTifPage();
readTifImages();
}
/**
* 单纯读tif文件的页数
*/
private static void readTifPage() {
File file = null;
Long tifPage;
file = new File(path);
if (file.isFile()) {
FileSeekableStream fs = null;
TIFFDecodeParam tifParam = new TIFFDecodeParam();
try {
fs = new FileSeekableStream(file);
ImageDecoder dec = ImageCodec.createImageDecoder("tiff", fs,
tifParam);
tifPage = new Long(dec.getNumPages());
System.out.println("这张图片有多少页码: " + tifPage);
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 分页读取
*
* @throws IOException
*/
private static void readTifImages() throws IOException {
FileSeekableStream ss = new FileSeekableStream(path);
TIFFDecodeParam param0 = null;
TIFFEncodeParam param = new TIFFEncodeParam();
JPEGEncodeParam param1 = new JPEGEncodeParam();
ImageDecoder dec = ImageCodec.createImageDecoder("tiff", ss, param0);
int count = dec.getNumPages();
param.setCompression(TIFFEncodeParam.COMPRESSION_GROUP4);
param.setLittleEndian(false); // Intel
System.out.println("这个Tif文件 有" + count + "十张图片");
for (int i = 0; i <count; i++) {
RenderedImage page = dec.decodeAsRenderedImage(i);
File f = new File("./img_" + i + ".jpg");
System.out.println("Saving " + f.getCanonicalPath());
ParameterBlock pb = new ParameterBlock();
pb.addSource(page);
pb.add(f.toString());
pb.add("JPEG");
pb.add(param1);
JAI.create("filestore", pb);
//JAI.create("filestore", page, "./Img_new" + i +".jpg", "JPEG", param1);
}
}
}