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);pdfUtil
package 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) {
}
}
}
} 链接地址： https://blog.csdn.net/Aurora_____/article/details/111209096