一、maven安装
二、Java代码实现
import org.icepdf.core.pobjects.Document;
import org.icepdf.core.pobjects.Page;
import org.icepdf.core.util.GraphicsRenderingHints;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Iterator;
public class CapturePdfFirstPageUtil {
/**
* 生成一本书的缩略图
*
* @param inputFile 需要生成缩略图的书籍的完整路径
* @param outputFile 生成缩略图的放置路径
*/
public static void generateBookIamge(String inputFile, String outputFile) {
Document document = null;
try {
float rotation = 0f;
// 缩略图显示倍数，1表示不缩放，0.5表示缩小到50%
float zoom = 0.8f;
document = new Document();
document.setFile(inputFile);
BufferedImage p_w_picpath = (BufferedImage) document.getPageImage(0, GraphicsRenderingHints.SCREEN,
Page.BOUNDARY_CROPBOX, rotation, zoom);
Iterator iter = ImageIO.getImageWritersBySuffix("jpg");
ImageWriter writer = (ImageWriter) iter.next();
FileOutputStream out = new FileOutputStream(new File(outputFile));
ImageOutputStream outImage = ImageIO.createImageOutputStream(out);
writer.setOutput(outImage);
writer.write(new IIOImage(p_w_picpath, null, null));
} catch (Exception e) {
System.out.println("生成书的缩略图失败 : " + inputFile);
System.out.println(e);
}
}
public static void main(String[] args) {
CapturePdfFirstPageUtil.generateBookIamge("C:\Users\Downloads\我是帅子男一号.pdf", "C:\Users\Desktop\帅子男一号.jpg");
}
}
