导入pom文件
xml
复制代码
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>fontbox</artifactId>
<version>2.0.22</version>
</dependency>
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.31</version>
<!--3.0及以上没有load方法，PDDocument.load(file);-->
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>net.sf.cssbox</groupId>
<artifactId>pdf2dom</artifactId>
<version>2.0.3</version>
</dependency>
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox-tools</artifactId>
<version>2.0.22</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.10.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.alibaba.fastjson2</groupId>
<artifactId>fastjson2</artifactId>
<version>2.0.49</version>
</dependency>
整个pdf转换成图片
java
复制代码
package pdfToPng;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
public class Pdf2Png {
/**
* 使用pdfbox将整个pdf转换成图片
* 多页pdf会生成多页的图片，后缀会生成图片的位置序号
*
* @param fileAddress 文件地址 如:C:\\Users\\user\\Desktop\\test
* @param filename PDF文件名不带后缀名
* @param type 图片类型 png和jpg
*/
public static void pdf2png(String fileAddress, String filename, String type) {
long startTime = System.currentTimeMillis();
// 将文件地址和文件名拼接成路径 注意：线上环境不能使用\\拼接
File file = new File(fileAddress + "\\" + filename + ".pdf");
try {
// 写入文件
PDDocument doc = PDDocument.load(file);
PDFRenderer renderer = new PDFRenderer(doc);
int pageCount = doc.getNumberOfPages();
for (int i = 0; i < pageCount; i++) {
// dpi为144，越高越清晰，转换越慢 Windows native DPI
BufferedImage image = renderer.renderImageWithDPI(i, 144);
// 将图片写出到该路径下
ImageIO.write(image, type, new File(fileAddress + "\\" + filename + "_" + (i + 1) + "." + type));
}
long endTime = System.currentTimeMillis();
System.out.println("共耗时：" + ((endTime - startTime) / 1000.0) + "秒");
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
pdf2png("C:\\Users\\MES\\Desktop\\test1", "1", "png");
}
}
自由确定起始页和终止页
java
复制代码
package pdfToPng;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
public class Pdf3Png {
/**
* 自由确定起始页和终止页
*
* @param fileAddress 文件地址 如:C:\\Users\\user\\Desktop\\test
* @param filename PDF文件名不带后缀名
* @param indexOfStart 开始页 开始转换的页码，从0开始
* @param indexOfEnd 结束页 停止转换的页码，-1为全部
* @param type 图片类型 png 和jpg
*/
public static void pdf3png(String fileAddress, String filename, int indexOfStart, int indexOfEnd, String type) {
long startTime = System.currentTimeMillis();
// 将文件地址和文件名拼接成路径 注意：线上环境不能使用\\拼接
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++) {
// dpi为144，越高越清晰，转换越慢
BufferedImage image = renderer.renderImageWithDPI(i, 144);
// 将图片写出到该路径下
ImageIO.write(image, type, new File(fileAddress + "\\" + filename + "_" + (i + 1) + "." + type));
}
long endTime = System.currentTimeMillis();
System.out.println("共耗时：" + ((endTime - startTime) / 1000.0) + "秒");
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
pdf3png("C:\\Users\\MES\\Desktop\\", "1", 1, 1, "png");
}
}
使用文件流整个pdf转换成图片
java
复制代码
package pdfToPng;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.*;
public class Pdf4Png {
/**
* 使用文件流整个pdf转换成图片
*
* @param fileAddress 文件地址 如:C:\\Users\\user\\Desktop\\test
* @param filename PDF文件名不带后缀名
* @param type 图片类型 png 、jpg
*/
public static void pdfToImage(String fileAddress, String filename, String type) {
long startTime = System.currentTimeMillis();
List<Map<String, String>> list = new ArrayList<>();
Map<String, String> resultMap = null;
PDDocument pdDocument = null;
String fileName = null;
String imgPath = null;
try {
// 将文件地址和文件名拼接成路径 注意：线上环境不能使用\\拼接
File FilePath = new File(fileAddress + "\\" + filename + ".pdf");
// 文件流
FileInputStream inputStream = new FileInputStream(FilePath);
int dpi = 296;
pdDocument = PDDocument.load(inputStream);
PDFRenderer renderer = new PDFRenderer(pdDocument);
int pageCount = pdDocument.getNumberOfPages();
/* dpi越大转换后越清晰，相对转换速度越慢 */
for (int i = 0; i < pageCount; i++) {
resultMap = new HashMap<>();
fileName = filename + "_" + (i + 1) + "." + type;
imgPath = fileAddress + "\\" + fileName;
BufferedImage image = renderer.renderImageWithDPI(i, dpi);
ImageIO.write(image, type, new File(imgPath));
resultMap.put("fileName", fileName);
resultMap.put("filePath", imgPath); // 图片路径
list.add(resultMap);
}
long endTime = System.currentTimeMillis();
System.out.println("共耗时：" + ((endTime - startTime) / 1000.0) + "秒"); //转化用时
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
// 这里需要关闭PDDocument，不然如果想要删除pdf文件时会提示文件正在使用，无法删除的情况
pdDocument.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) throws FileNotFoundException {
pdfToImage("C:\\Users\\MES\\Desktop\\", "1", "png");
}
}