场景：将PDF存在阿里的OSS中，程序获取OSS的PDF数据，然后进行填充，下载。
1、既然要填充PDF,必然需要制作PDF模板，可以使用Adobe Acrobat DC(如需破解版的，请下方留言)
2、开始制作模板
PDF模板
3、使用Adobe Acrobat DC打开保存的PDF文件，然后搜索 "准备表单" ,点击 ”准备表单“，然后出来表单域
寻找表单
字段修改
4、代码依赖
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>
<!-- itextpdf 依赖包start -->
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.10</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-asian</artifactId>
<version>5.2.0</version>
</dependency>
<!-- itextpdf 依赖包end -->
<!--pdf 转图片 start -->
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.11</version>
</dependency>
<dependency>
<groupId>net.coobird</groupId>
<artifactId>thumbnailator</artifactId>
<version>0.4.2</version>
</dependency>
<!--pdf 转图片 end -->
package com.yangwj.demo.controller;
import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.*;
import org.apache.commons.io.fileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.*;
import java.util.List;
public class PdfUtils {
public static void main(String[] args) throws IOException {
HashMap map = new HashMap<String, String>();
map.put("name","杨杰");
map.put("sex","男");
map.put("age","27");
map.put("phone","15521331");
map.put("email","812406fdf@qq.com");
map.put("idCard","4305223243434332");
map.put("hobby","跑步");
map.put("time","2019年5月22日");
// String path = PdfUtils.class.getResource("/template").getPath();
// System.out.println("path:" path);
// String sourceFile = path File.separator "test.pdf";
String sourceFile = "C:\\Users\\yangwj\\Desktop\\test.pdf";
String targetFile = "C:\\Users\\yangwj\\Desktop\\test_fill.pdf";
genPdf(map,sourceFile,targetFile);
// System.out.println("获取pdf表单中的fieldNames:" getTemplateFileFieldNames(sourceFile));
// System.out.println("读取文件数组:" fileBuff(sourceFile));
// System.out.println("pdf转图片:" pdf2Img(new File(targetFile),imageFilePath));
}
private static void genPdf(HashMap map, String sourceFile, String targetFile) throws IOException {
File templateFile = new File(sourceFile);
fillParam(map, FileUtils.readFileTobyteArray(templateFile), targetFile);
}
public static void fillParam(Map<String, String> fieldValueMap, byte[] file, String contractFileName) {
FileOutputStream fos = null;
try {
fos = new FileOutputStream(contractFileName);
Pdfreader reader = null;
PdfStamper stamper = null;
BaseFont base = null;
try {
reader = new PdfReader(file);
stamper = new PdfStamper(reader, fos);
stamper.setFormFlattening(true);
base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
AcroFields acroFields = stamper.getAcroFields();
for (String key : acroFields.getFields().keySet()) {
acroFields.setFieldProperty(key, "textfont", base, null);
acroFields.setFieldProperty(key, "textsize", new Float(9), null);
}
if (fieldValueMap != null) {
for (String fieldName : fieldValueMap.keySet()) {
acroFields.setField(fieldName, fieldValueMap.get(fieldName));
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (stamper != null) {
try {
stamper.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (reader != null) {
reader.close();
}
}
} catch (Exception e) {
System.out.println("填充参数异常");
e.printStackTrace();
} finally {
IOUtils.closeQuietly(fos);
}
}
public static Set<String> getTemplateFileFieldNames(String pdfFileName) {
Set<String> fieldNames = new TreeSet<String>();
PdfReader reader = null;
try {
reader = new PdfReader(pdfFileName);
Set<String> keys = reader.getAcroFields().getFields().keySet();
for (String key : keys) {
int lastIndexOf = key.lastIndexOf(".");
int lastIndexOf2 = key.lastIndexOf("[");
fieldNames.add(key.substring(lastIndexOf != -1 ? lastIndexOf 1 : 0, lastIndexOf2 != -1 ? lastIndexOf2 : key.length()));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();
}
}
return fieldNames;
}
public static byte[] fileBuff(String filePath) throws IOException {
File file = new File(filePath);
long fileSize = file.length();
if (fileSize > Integer.MAX_VALUE) {
//System.out.println("file too big...");
return null;
}
FileInputStream fi = new FileInputStream(file);
byte[] file_buff = new byte[(int) fileSize];
int offset = 0;
int numRead = 0;
while (offset < file_buff.length && (numRead = fi.read(file_buff, offset, file_buff.length - offset)) >= 0) {
offset = numRead;
}
// 确保所有数据均被读取
if (offset != file_buff.length) {
throw new IOException("Could not completely read file " file.getName());
}
fi.close();
return file_buff;
}
public static void mergePdfFiles(String[] files, String savepath) {
Document document = null;
try {
document = new Document(); //默认A4大小
PdfCopy copy = new PdfCopy(document, new FileOutputStream(savepath));
document.open();
for (int i = 0; i < files.length; i ) {
PdfReader reader = null;
try {
reader = new PdfReader(files[i]);
int n = reader.getNumberOfPages();
for (int j = 1; j <= n; j ) {
document.newPage();
PdfImportedPage page = copy.getImportedPage(reader, j);
copy.addPage(page);
}
} finally {
if (reader != null) {
reader.close();
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭PDF文档流，OutputStream文件输出流也将在PDF文档流关闭方法内部关闭
if (document != null) {
document.close();
}
}
}
/**
* pdf转图片
* @param file pdf
* @return
*/
public static boolean pdf2Img(File file,String imageFilePath) {
try {
//生成图片保存
byte[] data = pdfToPic(PDDocument.load(file));
File imageFile = new File(imageFilePath);
ImageThumbUtils.thumbImage(data, 1, imageFilePath); //按比例压缩图片
System.out.println("pdf转图片文件地址:" imageFilePath);
return true;
} catch (Exception e) {
System.out.println("pdf转图片异常：");
e.printStackTrace();
}
return false;
}
/**
* pdf转图片
*/
private static byte[] pdfToPic(PDDocument pdDocument) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
List<BufferedImage> piclist = new ArrayList<BufferedImage>();
try {
PDFRenderer renderer = new PDFRenderer(pdDocument);
for (int i = 0; i < pdDocument.getNumberOfPages(); i ) {//
// 0 表示第一页，300 表示转换 dpi，越大转换后越清晰，相对转换速度越慢
BufferedImage image = renderer.renderImageWithDPI(i, 108);
piclist.add(image);
}
// 总高度 总宽度 临时的高度 , 或保存偏移高度 临时的高度，主要保存每个高度
int height = 0, width = 0, _height = 0, __height = 0,
// 图片的数量
picNum = piclist.size();
// 保存每个文件的高度
int[] heightArray = new int[picNum];
// 保存图片流
BufferedImage buffer = null;
// 保存所有的图片的RGB
List<int[]> imgRGB = new ArrayList<int[]>();
// 保存一张图片中的RGB数据
int[] _imgRGB;
for (int i = 0; i < picNum; i ) {
buffer = piclist.get(i);
heightArray[i] = _height = buffer.getHeight();// 图片高度
if (i == 0) {
// 图片宽度
width = buffer.getWidth();
}
// 获取总高度
height = _height;
// 从图片中读取RGB
_imgRGB = new int[width * _height];
_imgRGB = buffer.getRGB(0, 0, width, _height, _imgRGB, 0, width);
imgRGB.add(_imgRGB);
}
// 设置偏移高度为0
_height = 0;
// 生成新图片
BufferedImage imageResult = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
int[] lineRGB = new int[8 * width];
int c = new Color(128, 128, 128).getRGB();
for (int i = 0; i < lineRGB.length; i ) {
lineRGB[i] = c;
}
for (int i = 0; i < picNum; i ) {
__height = heightArray[i];
// 计算偏移高度
if (i != 0)
_height = __height;
imageResult.setRGB(0, _height, width, __height, imgRGB.get(i), 0, width); // 写入流中
// 模拟页分隔
if (i > 0) {
imageResult.setRGB(0, _height 2, width, 8, lineRGB, 0, width);
}
}
// 写流
ImageIO.write(imageResult, "jpg", baos);
} catch (Exception e) {
System.out.println("pdf转图片异常：");
e.printStackTrace();
} finally {
IOUtils.closeQuietly(baos);
try {
pdDocument.close();
} catch (Exception ignore) {
}
}
return baos.toByteArray();
}
}
如有问题，欢迎私信，因为这个项目是有做过的，所以，你使用起来有问题，可以下方留言
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