Java pdf转高清图片

package com.hyb.kai.web.controller;

import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

import org.icepdf.core.pobjects.Document;
import org.icepdf.core.util.GraphicsRenderingHints;

/**
* @author: GPJ
* @Description: pdf 转单张高清图片
* @Date Created in 9:27 2018/1/9
* @Modified By:
*/
public class IcePdf {
public static void pdf2Pic(String pdfPath, String path){
Document document = new Document();
document.setFile(pdfPath);
//缩放比例
float scale = 2.5f;
//旋转角度
float rotation = 0f;

for (int i = 0; i < document.getNumberOfPages(); i++) {
BufferedImage image = (BufferedImage)
document.getPageImage(i, GraphicsRenderingHints.SCREEN, org.icepdf.core.pobjects.Page.BOUNDARY_CROPBOX, rotation, scale);
RenderedImage rendImage = image;
try {
String imgName = i + ".png";
System.out.println(imgName);
File file = new File(path + imgName);
ImageIO.write(rendImage, "png", file);
} catch (IOException e) {
e.printStackTrace();
}
image.flush();
}
document.dispose();
}
public static void main(String[] args) {
String filePath = "D:\\bbb.pdf";
pdf2Pic(filePath, "D:\\bb");
}
}