1、引入jar包：
<dependency> <groupId>org.icepdf.os</groupId> <artifactId>icepdf-core</artifactId> <version>4.1.1</version> <exclusions> <exclusion> <groupId>javax.media</groupId> <artifactId>jai-core</artifactId> </exclusion> </exclusions> </dependency>
注意：如果在 pom 中无法下载对应的jar包，可以在maven中将该包上传到nexus，或者直接引入本地jar包，如果是引入本地jar包，pom中需添加如下配置：
< build >
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!-- 允许加入额外的jar包 -->
<includeSystemScope>true</includeSystemScope>
</configuration>
</plugin>
</plugins>
</build>
</build>
同时，将引入的jar包指向导入的位置：
<dependency>
<groupId>org.icepdf.os</groupId>
<artifactId>icepdf-core</artifactId>
<version>4.1.1</version>
<scope>system</scope>
<systemPath>${basedir}/src/main/lib/icepdf-core-4.1.1.jar</systemPath>
<exclusions>
<exclusion>
<groupId>javax.media</groupId>
<artifactId>jai-core</artifactId>
</exclusion>
</exclusions>
</dependency>
结构如下图：
2、代码实现：
package com.cookie.util;
import org.icepdf.core.exceptions.PDFException;
import org.icepdf.core.exceptions.PDFSecurityException;
import org.icepdf.core.pobjects.Document;
import org.icepdf.core.pobjects.Page;
import org.icepdf.core.util.GraphicsRenderingHints;
import org. slf4j .Logger;
import org.slf4j.LoggerFactory;
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.*;
import java.text.DecimalFormat;
import java.util.Iterator;
/**
* author : cxq
* Date : 2019/8/12
*/public class Pdf2ImgUtil {
private static Logger logger = LoggerFactory.getLogger(Pdf2ImgUtil.class);
public static final String FILETYPE_JPG = "jpg";
/**
*
* 将指定的pdf文件转换为指定路径的图片
* @param filepath 原文件路径，例如d:/test/test.pdf
* @param imagepath 图片生成路径，例如 d:/test/
* @param zoom 缩略图显示倍数，1表示不缩放，0.3则缩小到30%
*
*/ public static void tranfer(String filepath, String imagepath, float zoom) throws PDFException, PDFSecurityException, IOException {
Document document = null;
float rotation = 0f;
document = new Document();
document.setFile(filepath);
int maxPages = document.getPageTree().getNumberOfPages();
for (int i = 0; i < maxPages; i++) {
BufferedImage img = (BufferedImage) document.getPageImage(i, GraphicsRenderingHints.SCREEN, Page.BOUNDARY_CROPBOX, rotation, zoom);
Iterator iter = ImageIO.getImageWritersBySuffix(FILETYPE_JPG);
ImageWriter writer = (ImageWriter) iter.next();
File outFile = new File(imagepath + new File(filepath).getName() + "_" + new DecimalFormat("0").format(i+1) + "." + FILETYPE_JPG);
FileOutputStream out = new FileOutputStream(outFile);
ImageOutputStream outImage = ImageIO.createImageOutputStream(out);
writer.setOutput(outImage);
writer.write(new IIOImage(img, null, null));
}
System.out.println("转换完成");
}
public static void main(String[] args) throws PDFException, PDFSecurityException, IOException {
tranfer("d:/1.pdf", "d:/", 1);
}
}
运行main方法，结果如下图：
