一、创建pdf模板

使用PDFelement制作pdf模板(数据域的名称对应后面插入的key)

二、导入maven依赖

com.itextpdf

itextpdf

5.5.13

com.itextpdf

itext-asian

5.2.0

三、插入数据和图片到pdf模板Map data；//要插入的数据

//初始化itext

//设置编码

BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);

PdfReader pdfReader=new PdfReader(“pdf模板文件路径”);

PdfStamper pdfStamper=new PdfStamper(pdfReader, new FileOutputStream(“输出pdf文件路径”));

AcroFields form = pdfStamper.getAcroFields();

form.addSubstitutionFont(baseFont);

//写入数据

for(String key:data.keySet()){

String value=data.get(key).toString();

//key对应模板数据域的名称

form.setField(key,value);

}

//添加图片

int pageNo = form.getFieldPositions("img").get(0).page;

Rectangle signRect = form.getFieldPositions("img").get(0).position;

float x = signRect.getLeft();

float y = signRect.getBottom();

Image image = Image.getInstance("图片路径");

PdfContentByte under = pdfStamper.getOverContent(pageNo);

//设置图片大小

image.scaleAbsolute(signRect.getWidth(), signRect.getHeight());

//设置图片位置

image.setAbsolutePosition(x, y);

under.addImage(image);

//设置不可编辑

pdfStamper.setFormFlattening(true);

pdfStamper.close();

PS：合并多个pdf成一个//先删除之前的all.pdf

String filePath="all.pdf";

File file=new File(filePath);

file.delete();

//要合并的所有pdf的路径

List fileList;

//all.pdf保存路径

String savepath="all.pdf";

Document document = null;

try {

document = new Document(new PdfReader(fileList.get(0)).getPageSize(1));

PdfCopy copy = new PdfCopy(document, new FileOutputStream(savepath));

document.open();

for (int i = 0; i < fileList.size(); i++) {

PdfReader reader = new PdfReader(fileList.get(i));

int n = reader.getNumberOfPages();// 获得总页码

for (int j = 1; j <= n; j++) {

document.newPage();

PdfImportedPage page = copy.getImportedPage(reader, j);// 从当前Pdf,获取第j页

copy.addPage(page);

}

}

} catch (IOException e) {

e.printStackTrace();

} catch (DocumentException e) {

e.printStackTrace();

} finally {

if (document != null) {

document.close();

}

}

下面代码是用在项目中使用得截取部分作为参考：

// 保存路径 生成String savePath =

GlConfig.getDownloadResourcePath() + "student/" + student.getName() + "ClassHoursProve.pdf";

// 生成 pdf

PdfUtil.exportTemplateByPdf(savePath, dto.toJson(), path);

pdfUtilpackage com.gl.common.file.util;

import cn.hutool.core.io.resource.ResourceUtil;

import cn.hutool.json.JSONObject;

import com.itextpdf.text.Document;

import com.itextpdf.text.Image;

import com.itextpdf.text.PageSize;

import com.itextpdf.text.Rectangle;

import com.itextpdf.text.pdf.*;

import lombok.extern.slf4j.Slf4j;

import org.apache.commons.io.IOUtils;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStream;

import java.net.URL;

import java.util.Map;

@Slf4j

public class PdfUtil {

/**

* 学时证明模板路径

*/

public static final URL TEMPLATE_URL = ResourceUtil.getResource("template/ClassHoursProve.pdf");

/**

* 导出PDF方法

*

* @param savePath 保存服务器路径

* @param obj 导出的参数

*/

public static void exportTemplateByPdf(String savePath, JSONObject obj,String filePath) {

PdfReader reader = null;

ByteArrayOutputStream bos = null;

PdfStamper stamper = null;

OutputStream os = null;

FileOutputStream out = null;

File file;

Document document = null;

PdfCopy copy = null;

Document doc = null;

try {

/** 实例化文档对象 */

document = new Document(PageSize.A4, 50, 40, 40, 50);

/** 创建 PdfWriter 对象 */

// 打开文档

document.open();

/** pdf文档中中文字体的设置，注意一定要添加iTextAsian.jar包 */

String localFontPath = "c:windowsfonts";

BaseFont bfChinese =

BaseFont.createFont(localFontPath + "simhei.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);

FileUtils.deleteFile(savePath);

file = new File(savePath);

if (!file.getParentFile().exists()) {

file.getParentFile().mkdirs();

}

out = new FileOutputStream(file);

reader = new PdfReader(TEMPLATE_URL);

bos = new ByteArrayOutputStream();

stamper = new PdfStamper(reader, bos);

AcroFields form = stamper.getAcroFields();

// 文字类的内容处理

form.addSubstitutionFont(bfChinese);

String vlaues;

for (Map.Entry entry : obj.entrySet()) {

vlaues = String.valueOf(entry.getValue());

if ("photo".equals(entry.getKey()) || "qrcode".equals(entry.getKey())) {

try {

// 通过域名获取所在页和坐标，左下角为起点

int pageNo = form.getFieldPositions(entry.getKey()).get(0).page;

Rectangle signRect = form.getFieldPositions(entry.getKey()).get(0).position;

// 印章位置

Rectangle seal_signRect = form.getFieldPositions("month").get(0).position;

float x = signRect.getLeft();

float y = signRect.getBottom();

// 印章坐标位置

float seal_x = seal_signRect.getLeft();

float seal_y = seal_signRect.getBottom();

// 读图片

Image image = Image.getInstance(vlaues);

Image seal_image = Image.getInstance(filePath);

// 获取操作的页面

PdfContentByte under = stamper.getOverContent(pageNo);

// 根据域的大小缩放图片

image.scaleToFit(signRect.getWidth(), signRect.getHeight());

seal_image.scaleToFit(signRect.getWidth(), signRect.getHeight());

// 添加图片

image.setAbsolutePosition(x, y);

seal_image.setAbsolutePosition(seal_x, seal_y);

under.addImage(image);

under.addImage(seal_image);

} catch (Exception e) {

log.info(e.getMessage());

}

} else {

if ("fileno".equals(entry.getKey())) {

form.setFieldProperty(entry.getKey(), "textsize", 50f, null);

} else {

form.setFieldProperty(entry.getKey(), "textsize", 10f, null);

}

form.setField(entry.getKey(), vlaues);

}

}

// 如果为false，生成的PDF文件可以编辑，如果为true，生成的PDF文件不可以编辑

stamper.setFormFlattening(true);

stamper.close();

doc = new Document();

copy = new PdfCopy(doc, out);

doc.open();

PdfImportedPage importPage = copy.getImportedPage(new PdfReader(bos.toByteArray()), 1);

copy.addPage(importPage);

doc.close();

document.close();

copy.flush();

copy.close();

} catch (Exception e) {

log.info(e.getMessage());

} finally {

try {

if (stamper != null) {

stamper.close();

stamper = null;

}

if (reader != null) {

reader.close();

reader = null;

}

IOUtils.closeQuietly(os);

IOUtils.closeQuietly(bos);

IOUtils.closeQuietly(out);

if (document != null) {

document.close();

document = null;

}

if (doc != null) {

doc.close();

doc = null;

}

if (copy != null) {

copy.flush();

copy.close();

copy = null;

}

} catch (Exception ignored) {

}

}

}

}