pdf转图片

使用到了fontbox、pdfbox这两个包，在maven仓库中查找，添加到pom.xml文件中。

官网下载地址：

https://pdfbox.apache.org/download.cgi#20x

示例代码

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Scanner;

import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;

public class Pdf2Png {
	
	//可自由确定起始页和终止页
	public static void pdf2png(String fileAddress,String filename,int indexOfStart,int indexOfEnd) {
		// 将pdf装图片 并且自定义图片得格式大小
				File file = new File(fileAddress+"\\"+filename+".pdf");
				try {
					PDDocument doc = PDDocument.load(file);
					PDFRenderer renderer = new PDFRenderer(doc);
					int pageCount = doc.getNumberOfPages();
					for (int i = indexOfStart; i < indexOfEnd; i++) {
						BufferedImage image = renderer.renderImageWithDPI(i, 144); // Windows native DPI
						// BufferedImage srcImage = resize(image, 240, 240);//产生缩略图
						ImageIO.write(image, "PNG", new File(fileAddress+"\\"+filename+"_"+(i+1)+".png"));
					}
				} catch (IOException e) {
					e.printStackTrace();
				}
	}
	//转换全部的pdf
	public static void pdf2png(String fileAddress,String filename) {
		// 将pdf装图片 并且自定义图片得格式大小
				File file = new File(fileAddress+"\\"+filename+".pdf");
				try {
					PDDocument doc = PDDocument.load(file);
					PDFRenderer renderer = new PDFRenderer(doc);
					int pageCount = doc.getNumberOfPages();
					for (int i = 0; i < pageCount; i++) {
						BufferedImage image = renderer.renderImageWithDPI(i, 144); // Windows native DPI
						// BufferedImage srcImage = resize(image, 240, 240);//产生缩略图
						ImageIO.write(image, "PNG", new File(fileAddress+"\\"+filename+"_"+(i+1)+".png"));
					}
				} catch (IOException e) {
					e.printStackTrace();
				}
	}
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入需要转换的pdf的地址，例如 E:/软件/代码：");
		String fileAddress = sc.nextLine();
		System.out.println("请输入需要转换的pdf的名称，不要加.pdf后缀，例如 操作系统概念：");
		String filename =sc.nextLine();
		System.out.println("请输入开始转换的页码，从0开始，例如 5：");
		int indexOfStart=sc.nextInt();
		System.out.println("请输入停止转换的页码，-1为全部，例如 10：");
		int indexOfEnd=sc.nextInt();
		if (indexOfEnd==-1) {
			pdf2png(fileAddress, filename);
		}
		else {
			pdf2png(fileAddress, filename, indexOfStart, indexOfEnd);
		}
		
	}

}