SpringBoot 基于iText 根据PDF模板动态生成文件

SpringBoot 基于iText 根据PDF模板动态生成文件, 需要使用 adobe acrobat pro DC这个工具来自定义模板
支持根据PDF模板生成单页或多页PDF文件

adobe acrobat pro DC 自定义模板

下载地址

链接：https://pan.baidu.com/s/1Vn3bIQ5_D17sEZnkF2t7gg?pwd=n6o1 
提取码：n6o1

添加依赖

 <dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.4.2</version></dependency>

代码集成

import cn.hutool.core.io.resource.ClassPathResource;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.*;
import lombok.extern.slf4j.Slf4j;import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** @author wang*/
@Slf4j
public class PdfUtil {private PdfUtil() {}/*** generatePdf* @param params    params* @param outputPath    outputPath* @return  String*/public static String generatePdf(Map<String, String> params, String outputPath) {ClassPathResource resource = new ClassPathResource("templates/test_certificate_temp.pdf");InputStream inputStream = resource.getStream();ByteArrayOutputStream bos = null;PdfReader reader = null;FileOutputStream fos = null;try {reader = new PdfReader(inputStream);bos = new ByteArrayOutputStream();writePdf(params, bos, reader);fos = new FileOutputStream(outputPath);bos.writeTo(fos);} catch (Exception e) {log.error(e.getMessage(), e);return null;} finally {try {assert bos != null;bos.close();reader.close();assert fos != null;fos.close();} catch (IOException e) {log.error(e.getMessage(), e);}}return outputPath;}/*** generateMultiPagePdf** @param paramsList paramsList* @param outputPath outputPath* @return String*/public static String generateMultiPagePdf(List<Map<String, String>> paramsList, String outputPath) {FileOutputStream fos = null;PdfCopy copy = null;Document document = null;try {ClassLoader classLoader = Thread.currentThread().getContextClassLoader();InputStream inputStream = classLoader.getResourceAsStream("templates/test_certificate_temp.pdf");// 将模板读取到字节数组中assert inputStream != null;byte[] templateBytes = inputStream.readAllBytes();inputStream.close();fos = new FileOutputStream(outputPath);document = new Document();copy = new PdfCopy(document, fos);document.open();for (Map<String, String> params : paramsList) {ByteArrayOutputStream bos = new ByteArrayOutputStream();InputStream templateStream = new ByteArrayInputStream(templateBytes);PdfReader reader = new PdfReader(templateStream);writePdf(params, bos, reader);reader.close();templateStream.close();PdfReader pageReader = new PdfReader(new ByteArrayInputStream(bos.toByteArray()));copy.addPage(copy.getImportedPage(pageReader, 1));pageReader.close();}} catch (Exception e) {e.printStackTrace();return null;} finally {try {if (document != null) {document.close();}if (copy != null) {copy.close();}if (fos != null) {fos.close();}} catch (IOException e) {e.printStackTrace();}}return outputPath;}private static void writePdf(Map<String, String> params, ByteArrayOutputStream bos, PdfReader reader) throws DocumentException, IOException {PdfStamper pdfStamper = new PdfStamper(reader, bos);AcroFields acroFields = pdfStamper.getAcroFields();BaseFont font = BaseFont.createFont();for (Map.Entry<String, String> param : params.entrySet()) {acroFields.setFieldProperty(param.getKey(), "textfont", font, null);acroFields.setField(param.getKey(), param.getValue());}pdfStamper.setFormFlattening(true);pdfStamper.close();}public static void main(String[] args) throws IOException {List<Map<String, String>> paramsList = new ArrayList<>();Map<String, String> params = new HashMap<>(16);params.put("hullId", "hullId_001");params.put("boatYear", "boatYear_001");params.put("boatBrand", "boatBrand_001");params.put("boatModel", "boatModel_001");paramsList.add(params);params = new HashMap<>(16);params.put("hullId", "hullId_002");params.put("boatYear", "boatYear_002");params.put("boatBrand", "boatBrand_002");params.put("boatModel", "boatModel_002");paramsList.add(params);String outputPath = "D:\\opt\\file_encode_zip\\target\\test_Certificate_8-20-24_target.pdf";String path = generateMultiPagePdf(paramsList, outputPath);
//        String path = generatePdf(params, outputPath);System.out.println(path);}
}