pdf 转img

pox

---

package com.sailing.util;

import java.awt.Graphics2D;

import java.awt.RenderingHints;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import java.awt.image.ColorModel;

import java.awt.image.WritableRaster;

import java.io.File;

import java.io.IOException;

import javax.imageio.ImageIO;

import org.apache.pdfbox.pdmodel.PDDocument;

import org.apache.pdfbox.rendering.PDFRenderer;

/**

* Hello world!

*

*/

public class Pdf2Img {

public static void main(String[] args) {

// 将pdf装图片 并且自定义图片得格式大小

File file = new File("E:\\workALL\\java\\content.pdf");

try {

PDDocument doc = PDDocument.load(file);

PDFRenderer renderer = new PDFRenderer(doc);

int pageCount = doc.getNumberOfPages();

System.out.println(pageCount);

for (int i = 0; i < pageCount; i++) {

BufferedImage image = renderer.renderImageWithDPI(i, 196); // Windows

BufferedImage srcImage = resize(image, 1000, 1240);// 产生缩略图

File file2 = new File("E:\\workALL\\java\\content\\com" + System.currentTimeMillis() + ".png");

if (file2.exists()) {

System.out.println("file exists");

} else {

System.out.println("file not exists, create it ...");

try {

//file2.createNewFile();

ImageIO.write(srcImage, "PNG", file2);

} catch (IOException e) {

e.printStackTrace();

}

}

}

} catch (IOException e) {

e.printStackTrace();

}

}

private static BufferedImage resize(BufferedImage source, int targetW, int targetH) {

int type = source.getType();

BufferedImage target = null;

double sx = (double) targetW / source.getWidth();

double sy = (double) targetH / source.getHeight();

if (sx > sy) {

sx = sy;

targetW = (int) (sx * source.getWidth());

} else {

sy = sx;

targetH = (int) (sy * source.getHeight());

}

if (type == BufferedImage.TYPE_CUSTOM) {

ColorModel cm = source.getColorModel();

WritableRaster raster = cm.createCompatibleWritableRaster(targetW, targetH);

boolean alphaPremultiplied = cm.isAlphaPremultiplied();

target = new BufferedImage(cm, raster, alphaPremultiplied, null);

} else {

target = new BufferedImage(targetW, targetH, type);

}

Graphics2D g = target.createGraphics();

g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);

g.drawRenderedImage(source, AffineTransform.getScaleInstance(sx, sy));

g.dispose();

return target;

}

}