java使用PDFBox2.0将PDF生成图片

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);
}

/**
* 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RGB
int[] _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();
}
}
}