1. 依赖

     <!--图片转换pdf Start--><!-- https://mvnrepository.com/artifact/com.itextpdf/itextpdf --><dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.5.13</version></dependency><!-- https://mvnrepository.com/artifact/com.lowagie/itext --><dependency><groupId>com.lowagie</groupId><artifactId>itext</artifactId><version>4.2.1</version></dependency><!--图片转换pdf End-->

2. 工具类抽取

package com.gblfy.ly.util;package com.sinosoft.cmiip.modular.taskbatch.util;import com.itextpdf.text.Document;
import com.itextpdf.text.Image;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;/*** 图片批量转换pdf** @author gblfy* @date 2020-11-20*/
public class PicToPdfUtil {private final static Logger logger = LoggerFactory.getLogger(PicToPdfUtil.class);/*** 图片转pdf文件** @param source 图片路径* @param target pdf文件路径*/public static void convert(String source, String target) {Document document = new Document();// 设置文档页边距document.setMargins(0, 0, 0, 0);FileOutputStream fos = null;try {fos = new FileOutputStream(target);PdfWriter.getInstance(document, fos);// 打开文档document.open();// 获取图片的宽高Image image = Image.getInstance(source);float imageHeight = image.getScaledHeight();float imageWidth = image.getScaledWidth();// 设置页面宽高与图片一致Rectangle rectangle = new Rectangle(imageWidth, imageHeight);document.setPageSize(rectangle);// 图片居中image.setAlignment(Image.ALIGN_CENTER);// 新建一页添加图片document.newPage();document.add(image);} catch (Exception ioe) {logger.error("转换出现异常:", ioe.getMessage());} finally {// 关闭文档document.close();try {fos.flush();fos.close();} catch (IOException e) {e.printStackTrace();}}logger.info("图片转换完成！！！");}/*** 图片批量转换pdf入口** @param picFilePath* @param pdfFilePaths*/public static void getPathFileList(String picFilePath, String pdfFilePaths) {ArrayList<String> files = getFiles(picFilePath);getFileName(files, pdfFilePaths);}/*** 将pic图片文件批量换换位pdf文件** @param files* @return*/public static void getFileName(ArrayList<String> files, String pdfFilePath) {for (int i = 0; i < files.size(); i++) {String fileName = files.get(i);String picFileName = fileName.substring(fileName.lastIndexOf(File.separator) + 1);String[] split = picFileName.split("\\.");String pdfFileName = split[0];String pdfSuffix = ".pdf";//文件转换统一处理convert(fileName, pdfFilePath + pdfFileName + pdfSuffix);}}/*** 获取指定目录下的文件绝对路径列表** @param picFilePath 目录* @return*/public static ArrayList<String> getFiles(String picFilePath) {ArrayList<String> files = new ArrayList<String>();File file = new File(picFilePath);File[] fileList = file.listFiles();for (int i = 0; i < fileList.length; i++) {if (fileList[i].isFile()) {files.add(fileList[i].toString());}}return files;}public static void main(String[] args) {//待转换的图片目录String picFilePath = "D:\\222\\pic\\";//转换的pdf目录String pdfFilePath = "D:\\222\\pdf\\";getPathFileList(picFilePath, pdfFilePath);}
}