java使用PDFBox2.0将PDF生成图片

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使用到包：commons-logging.jar、 pdfbox-2.0.1.jar、fontbox-2.0.1.jarimport 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);}/** * 将宽度相同的图片，竖向追加在一起 ##注意：宽度必须相同 *  * @param piclist *            文件流数组 * @param outPath *            输出路径 */public static void yPic(List<BufferedImage> piclist, String outPath) {// 纵向处理图片if (piclist == null || piclist.size() <= 0) {System.out.println("图片数组为空!");return;}try {int height = 0, // 总高度width = 0, // 总宽度_height = 0, // 临时的高度 , 或保存偏移高度__height = 0, // 临时的高度，主要保存每个高度picNum = piclist.size();// 图片的数量File fileImg = null; // 保存读取出的图片int[] heightArray = new int[picNum]; // 保存每个文件的高度BufferedImage buffer = null; // 保存图片流List<int[]> imgRGB = new ArrayList<int[]>(); // 保存所有的图片的RGBint[] _imgRGB; // 保存一张图片中的RGB数据for (int i = 0; i < picNum; i++) {buffer = piclist.get(i);heightArray[i] = _height = buffer.getHeight();// 图片高度if (i == 0) {width = buffer.getWidth();// 图片宽度}height += _height; // 获取总高度_imgRGB = new int[width * _height];// 从图片中读取RGB_imgRGB = buffer.getRGB(0, 0, width, _height, _imgRGB, 0, width);imgRGB.add(_imgRGB);}_height = 0; // 设置偏移高度为0// 生成新图片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; // 计算偏移高度imageResult.setRGB(0, _height, width, __height, imgRGB.get(i),0, width); // 写入流中}File outFile = new File(outPath);ByteArrayOutputStream out = new ByteArrayOutputStream();ImageIO.write(imageResult, "jpg", out);// 写图片byte[] b = out.toByteArray();FileOutputStream output = new FileOutputStream(outFile);output.write(b);out.close();output.close();} catch (Exception e) {e.printStackTrace();}}}
PDFBox2.0 下载地址https://pdfbox.apache.org/download.cgi#20x
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