提示：文章写完后，目录可以自动生成，如何生成可参考右边的帮助文档
前言
对pdf文档的合并转换 加水印等 多个文件转pdf 还有改变图片的尺寸大小
依赖包可以自己去找下
代码
package com.yilu.archives.doc.utils;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.documents4j.api.DocumentType;
import com.documents4j.api.IConverter;
import com.documents4j.job.LocalConverter;
import com.itextpdf.text.Font;
import com.itextpdf.text.Image;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.PdfPageSize;
import com.spire.pdf.graphics.PdfMargins;
import com.yilu.archives.doc.dao.entity.TArchivesFileTransition;
import com.yilu.archives.doc.dao.mapper.TArchivesFileTransitionMapper;
import org.apache.pdfbox.multipdf.PDFMergerUtility;
import org.springframework.beans.factory.annotation.Autowired;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.Dimension2D;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import java.io.*;
import java.security.MessageDigest;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Random;
public class PdfFileUtils {
@Autowired
TArchivesFileTransitionMapper archivesFileTransitionMapper;
/**
*
* @param files 要合并的文件路径
* @param mergePath 存放路径的文件夹
* @throws FileNotFoundException
*/
public static String MergePdf(List<String> files,String mergePath) throws FileNotFoundException {
//pdf合并工具类
PDFMergerUtility mergePdf = new PDFMergerUtility();
//合并pdf生成的文件名
String destinationFileName =new Date().getTime()+".pdf";
//这是需要合并的PDF文件
// String filePath = targetPath;
// 合并后pdf存放路径
String bothPath = mergePath;
File file3 = new File(bothPath);
try{
if(!file3.exists()){
file3.mkdirs();
}
}catch(Exception e1){
e1.printStackTrace();
}
//循环拿到要合成的路径
for (String file : files){
mergePdf.addSource(file);
}
//设置合并生成pdf文件名称
mergePdf.setDestinationFileName(bothPath + File.separator + destinationFileName);
//合并pdf
try {
mergePdf.mergeDocuments();
//合并pdf文件后 进行页面大小设置
//mergePdf.getDestinationFileName() 当前合并pdf文件的名称
//inpath 目前测试的路径 后期要修改 是绝对路径
Random r = new Random();
int anInt = r.nextInt(5);
String path=mergePath+"/"+anInt+".pdf";
//修改图片的样式
//String amendpage = amendpage(mergePdf.getDestinationFileName(), destinationFileName);
//创建PdfDocument对象
PdfDocument originalDoc = new PdfDocument();
//加载PDF文件
originalDoc.loadFromFile(mergePdf.getDestinationFileName());
//创建一个新的PdfDocument实例
PdfDocument newDoc = new PdfDocument();
//遍历所有PDF 页面
Dimension2D dimension2D = new Dimension();
for (int i = 0; i < originalDoc.getPages().getCount(); i++) {
PdfPageBase page = originalDoc.getPages().get(i);
PdfMargins margins = new PdfMargins(0,0,0,0);
//设置新文档的页面大小为A4
PdfPageBase newPage = newDoc.getPages().add(PdfPageSize.Arch_A, margins);
//调整画布，设置内容也根据页面的大小进行缩放
double wScale = (PdfPageSize.Arch_A.getWidth()) / PdfPageSize.Arch_A.getWidth();
double hScale = (PdfPageSize.Arch_A.getHeight()) / PdfPageSize.Arch_A.getHeight();
newPage.getCanvas().translateTransform(wScale, hScale);
//复制原文档的内容到新文档
newPage.getCanvas().drawTemplate(page.createTemplate(), new Point2D.Float());
//保存PDF
newDoc.saveToFile(path);
}
newDoc.close();
return path;
}catch (IOException e) {
e.printStackTrace();
return null;//返回空 给controller判断
}finally {
if(files!=null){
PdfFileUtils.delFiles(files);
}
if(mergePdf.getDestinationFileName()!=null){
PdfFileUtils.delFile(mergePdf.getDestinationFileName());
}
}
}
//传入参数，并进行文档格式转换 outpath：绝对路径
public static String eqfile(String outpath) {
String file = isImageFile(outpath);
return file;
}
/**
*
* @param outpath 要被转换的路径
* @fileNumber 档号 到时候要传入
* @return
*/
public static String isImageFile(String outpath) { //判断格式是否正确
//截取文档的后缀
String ext = outpath.substring(outpath.lastIndexOf(".") + 1); //截取点后面的字符串 lastIndexOf返回最后一次出现的位置
String s="";
// String pdfPath="";
if ("JPG".equalsIgnoreCase(ext)) {
//修改图片宽高
try {
changeSize(650,860,outpath);
} catch (Exception e) {
e.printStackTrace();
}
//转换pdf文档
s = transitionJpg(outpath, null);
}
if ("PDF".equalsIgnoreCase(ext)) {
s=outpath;
}
if ("DOC".equalsIgnoreCase(ext)) {
s = transitionDoc(outpath, null);
}
if ("DOCX".equalsIgnoreCase(ext)) {
s = transitionDocx(outpath, null);
}
if ("TIF".equalsIgnoreCase(ext)) {
try {
changeSize(650,860,outpath);
} catch (Exception e) {
e.printStackTrace();
}
s = transitionJpg(outpath, null);
}
if ("PNG".equalsIgnoreCase(ext)) {
try {
changeSize(650,860,outpath);
} catch (Exception e) {
e.printStackTrace();
}
s=transitionJpg(outpath, null);
}
return s;
}
/**
* doc转换成pdf 并保存，然后在删除原先的doc文件
* @param inputPath 后台找到存储的文件 传过来转换
* @param fileNumber 根据这个档号生成文件夹
* @return
*/
public static String transitionDoc(String inputPath, String fileNumber) {
//转义\\ 分割格式
String[] str = inputPath.split("\\.");
//拼接新的路径
String outputFile=str[0].toString()+".pdf";
try {
//合成
InputStream docxInputStream = new FileInputStream(inputPath);
OutputStream outputStream = new FileOutputStream(outputFile);
IConverter converter = LocalConverter.builder().build();
converter.convert(docxInputStream).as(DocumentType.DOC).to(outputStream).as(DocumentType.PDF).execute();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
//返回新的路径去保存
return outputFile;
}
/**
* docx转换成pdf
* @param inputpath 后台传过来的文档存放路径 去转换
* @param fileNumber
* @return
*/
public static String transitionDocx(String inputpath,String fileNumber) {
//转义\\ 分割格式
String[] str = inputpath.split("\\.");
//拼接新的路径
String outputFile=str[0].toString()+".pdf";
try {
InputStream docxInputStream = new FileInputStream(inputpath);
OutputStream outputStream = new FileOutputStream(outputFile);
IConverter converter = LocalConverter.builder().build();
converter.convert(docxInputStream).as(DocumentType.DOCX).to(outputStream).as(DocumentType.PDF).execute();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
return outputFile;
}
/**
* jpg转换成pdf,和tif转换成pdf 同用一个
* @param imagePath 后台传输过来的jpg路径
* @return
*/
public static String transitionJpg(String imagePath,String fileNumber) {
//转义\\ 分割格式
String[] str = imagePath.split("\\.");
//拼接新的路径
String outputFile=str[0].toString()+".pdf";
try {
BufferedImage img = ImageIO.read(new File(imagePath));
FileOutputStream fos = new FileOutputStream(outputFile);
Document doc = new Document(null, 0, 0, 0, 0);
doc.setPageSize(new Rectangle(img.getWidth(), img.getHeight()));
Image image = Image.getInstance(imagePath);
//设置图片的缩放
//image.scalePercent(100);
PdfWriter.getInstance(doc, fos);
doc.open();
doc.add(image);
doc.close();
} catch (IOException e) {
e.printStackTrace();
} catch (BadElementException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
}
return outputFile;
}
/**
* java修改pdf文档页面的宽高
* 参数 inPath 修改后的新的绝对路径
* 参数 outPath pdf的路径
* */
public static String amendpage(String outPath,String inPath){
//创建PdfDocument对象
PdfDocument originalDoc = new PdfDocument();
//加载PDF文件
originalDoc.loadFromFile(outPath);
//创建一个新的PdfDocument实例
PdfDocument newDoc = new PdfDocument();
//遍历所有PDF 页面
Dimension2D dimension2D = new Dimension();
for (int i = 0; i < originalDoc.getPages().getCount(); i++) {
PdfPageBase page = originalDoc.getPages().get(i);
PdfMargins margins = new PdfMargins(0,0,0,0);
//设置新文档的页面大小为A4
PdfPageBase newPage = newDoc.getPages().add(PdfPageSize.Arch_A, margins);
//调整画布，设置内容也根据页面的大小进行缩放
double wScale = (PdfPageSize.Arch_A.getWidth()) / PdfPageSize.Arch_A.getWidth();
double hScale = (PdfPageSize.Arch_A.getHeight()) / PdfPageSize.Arch_A.getHeight();
newPage.getCanvas().translateTransform(wScale, hScale);
//复制原文档的内容到新文档
newPage.getCanvas().drawTemplate(page.createTemplate(), new Point2D.Float());
//保存PDF
newDoc.saveToFile(outPath);
}
newDoc.close();
return outPath;
}
/**
*
* @param count 默认从1开始 在添加权限页面时设置
* @param srcFilePath 要加水印的pdf文档
* @param descFilePath 然后生成一个新的pdf文档
* @param textWatermark 加水印的档案馆信息
* @param textWaterpath 用户的信息 和修改的时间
* @return
* @throws IOException
* @throws DocumentException
*/
public static boolean pdfInsertWatermark(Integer count,String srcFilePath,String descFilePath,
String textWatermark,String textWaterpath,
Integer state)throws Exception {
PdfReader reader = new PdfReader(srcFilePath);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(descFilePath));
PdfGState gs = new PdfGState();
//统一的系统文字格式
BaseFont font = BaseFont.createFont("STSong-Light","UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
gs.setFillOpacity(0.2f);// 设置透明度
// 设置覆盖全页的文字格式
Font f=new Font(font,10);
Phrase p = new Phrase(textWaterpath,f);
int total = reader.getNumberOfPages() + 1;
PdfContentByte content;
//为每一页加上档案馆的水印
for (int i = count; i < total; i++) {
content = stamper.getOverContent(i);
content.beginText();
content.setGState(gs);
if(state==0){
content.setColorFill(BaseColor.RED); //水印颜色
}
if(state==1){
content.setColorFill(BaseColor.GRAY);
}
content.setFontAndSize(font, 40); //水印字体样式和大小
content.showTextAligned(Element.ALIGN_CENTER,textWatermark, 300, 300, 45); //水印内容和水印位置
//为每一页加上用户资料和修改的时间 以防档案泄露
for (int y = 0; y < 10; y++) {
for (int x = 0; x < 8; x++) {
// 水印文字成0度角倾斜
ColumnText.showTextAligned(content, Element.ALIGN_CENTER, p, 158 * y,80 + 140 * x , 45);
}
}
content.endText();
}
stamper.close();//关闭流 防止删除删除不了
reader.close();
reader=null;
return true;
}
/**
* 改变图片的尺寸
*
* @param newWidth, newHeight, path
* @return boolean
*/
public static void changeSize(int newWidth, int newHeight, String path) {
BufferedInputStream in = null;
try {
in = new BufferedInputStream(new FileInputStream(path));
//字节流转图片对象
BufferedImage bi = ImageIO.read(in);
//构建图片流
BufferedImage tag = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
//绘制改变尺寸后的图
tag.getGraphics().drawImage(bi, 0, 0, newWidth, newHeight, null);
//输出流
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(path));
//JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
//encoder.encode(tag);
ImageIO.write(tag, "JPG", out);
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//删除多个文件文件
public static void delFiles(List<String> paths){
for (int i=0;i<paths.size();i++){
File file=new File(paths.get(i));
if (file.exists()) {
file.delete();
}
}
}
public static void delFile(String paths){
File file=new File(paths);
if (file.exists()&&file.isFile()){
file.delete();
}
}
