使用到包：commons-logging.jar、 pdfbox-2.0.1.jar、fontbox-2.0.1.jar

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;


import javax.imageio.ImageIO;


import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;


public class PDFBOXCreate {


	public static void main(String[] args)throws Exception {
		long start = System.currentTimeMillis();
		String filepath = "D:/Users/ex-wangyide001/workspace/testsrc/1.pdf";
		PDDocument document = new PDDocument();
	 	File pdfFile = new File(filepath);
        document = PDDocument.load(pdfFile, (String)null);
        int size = document.getNumberOfPages();
        List<BufferedImage> piclist = new ArrayList(); 
        for(int i=0 ; i < size; i++){
        	BufferedImage  image = new PDFRenderer(document).renderImageWithDPI(i,130,ImageType.RGB);
        	piclist.add(image);
        }
        document.close();
        yPic(piclist,"D:/Users/ex-wangyide001/workspace/testsrc/PDFBox1.jpg");
       /* FileOutputStream out = new FileOutputStream("D:/Users/ex-wangyide001/workspace/testsrc/yanglaoxian/PDFBox-"+i+".jpg");
        ImageIO.write(image, "jpg", out);
        out.close();*/
        long end = System.currentTimeMillis();
        System.out.println(end-start);
	}
	
	
	/**
	 * 將寬度相同的圖片，豎向追加在一起 ##注意：寬度必須相同
	 * 
	 * @param piclist
	 *            檔案流陣列
	 * @param outPath
	 *            輸出路徑
	 */
	public static void yPic(List<BufferedImage> piclist, String outPath) {// 縱向處理圖片
		if (piclist == null || piclist.size() <= 0) {
			System.out.println("圖片陣列為空!");
			return;
		}
		try {
			int height = 0, // 總高度
			width = 0, // 總寬度
			_height = 0, // 臨時的高度 , 或儲存偏移高度
			__height = 0, // 臨時的高度，主要儲存每個高度
			picNum = piclist.size();// 圖片的數量
			File fileImg = null; // 儲存讀取出的圖片
			int[] heightArray = new int[picNum]; // 儲存每個檔案的高度
			BufferedImage buffer = null; // 儲存圖片流
			List<int[]> imgRGB = new ArrayList<int[]>(); // 儲存所有的圖片的RGB
			int[] _imgRGB; // 儲存一張圖片中的RGB資料
			for (int i = 0; i < picNum; i++) {
				buffer = piclist.get(i);
				heightArray[i] = _height = buffer.getHeight();// 圖片高度
				if (i == 0) {
					width = buffer.getWidth();// 圖片寬度
				}
				height += _height; // 獲取總高度
				_imgRGB = new int[width * _height];// 從圖片中讀取RGB
				_imgRGB = buffer
						.getRGB(0, 0, width, _height, _imgRGB, 0, width);
				imgRGB.add(_imgRGB);
			}
			_height = 0; // 設定偏移高度為0
			// 生成新圖片
			BufferedImage imageResult = new BufferedImage(width, height,
					BufferedImage.TYPE_INT_BGR);
			for (int i = 0; i < picNum; i++) {
				__height = heightArray[i];
				if (i != 0)
					_height += __height; // 計算偏移高度
				imageResult.setRGB(0, _height, width, __height, imgRGB.get(i),
						0, width); // 寫入流中
			}
			File outFile = new File(outPath);
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			ImageIO.write(imageResult, "jpg", out);// 寫圖片
			byte[] b = out.toByteArray();
			FileOutputStream output = new FileOutputStream(outFile);
			output.write(b);
			out.close();
			output.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}