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java导出pdf（使用html）

news 2025/8/2 22:42:48

引入maven

<dependencies><!-- Thymeleaf --><dependency><groupId>org.thymeleaf</groupId><artifactId>thymeleaf</artifactId><version>3.1.1.RELEASE</version> <!-- 或与 Spring Boot 匹配的版本 --></dependency><!-- Flying Saucer PDF 渲染（使用 OpenPDF 和 XHTMLRenderer） --><dependency><groupId>org.xhtmlrenderer</groupId><artifactId>flying-saucer-pdf-openpdf</artifactId><version>9.1.22</version></dependency><!-- iText 2.x (lowagie) 用于合并 PDF 页等操作 --><dependency><groupId>com.lowagie</groupId><artifactId>itext</artifactId><version>2.1.7</version></dependency><!-- Servlet API（如果你在非 Web 项目中操作 HttpServletResponse） --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>4.0.1</version><scope>provided</scope></dependency><!-- Lombok（用于注解 @Slf4j @SneakyThrows）--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.30</version><scope>provided</scope></dependency>
</dependencies>

工具类

package com.tlzf.util;import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
import org.w3c.dom.Document;
import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.*;
import java.util.List;
import java.util.Map;/*** pdf处理工具类** @author gourd.hu* @version 1.0findInstallationElevatorBlockVOById*/
@Slf4j
@Component
public class PdfUtil {private PdfUtil() {}/*** 按模板和参数生成html字符串,再转换为flying-saucer识别的Document** @param templateName freemarker模板名称x`* @param variables    freemarker模板参数* @return Document*/private static Document generateDoc(TemplateEngine templateEngine, String templateName, Map<String, Object> variables) {// 声明一个上下文对象，里面放入要存到模板里面的数据final Context context = new Context();context.setVariables(variables);StringWriter stringWriter = new StringWriter();try (BufferedWriter writer = new BufferedWriter(stringWriter)) {templateEngine.process(templateName, context, writer);writer.flush();DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();return builder.parse(new ByteArrayInputStream(stringWriter.toString().getBytes("UTF-8")));} catch (Exception e) {log.error(e.getMessage(), e);return null;}}/*** 核心: 根据freemarker模板生成pdf文档** @param templateEngine 配置* @param templateName   模板名称* @param out            输出流* @param listVars       模板参数* @throws Exception 模板无法找到、模板语法错误、IO异常*/private static void generateAll(TemplateEngine templateEngine, String templateName, OutputStream out, List<Map<String, Object>> listVars) throws Exception {if (CollectionUtils.isEmpty(listVars)) {log.warn("警告:模板参数为空!");return;}ITextRenderer renderer = new ITextRenderer();//设置字符集(宋体),此处必须与模板中的<body style="font-family: SimSun">一致,区分大小写,不能写成汉字"宋体"ITextFontResolver fontResolver = renderer.getFontResolver();//避免中文为空设置系统字体fontResolver.addFont("static/fonts/simsun.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);fontResolver.addFont("static/fonts/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);//根据参数集个数循环调用模板,追加到同一个pdf文档中//(注意:此处从1开始,因为第0是创建pdf,从1往后则向pdf中追加内容)for (int i = 0; i < listVars.size(); i++) {Document docAppend = generateDoc(templateEngine, templateName, listVars.get(i));renderer.setDocument(docAppend, null);renderer.getSharedContext().setBaseURL(null);//展现和输出pdfrenderer.layout();if (i == 0) {renderer.createPDF(out, false);} else {//写下一个pdf页面renderer.writeNextDocument();}}renderer.finishPDF(); //完成pdf写入}private static void generateAll(TemplateEngine templateEngine, String templateName, OutputStream out, List<Map<String, Object>> listVars, String path) throws Exception {if (CollectionUtils.isEmpty(listVars)) {log.warn("警告:模板参数为空!");return;}ITextRenderer renderer = new ITextRenderer();//设置字符集(宋体),此处必须与模板中的<body style="font-family: SimSun">一致,区分大小写,不能写成汉字"宋体"ITextFontResolver fontResolver = renderer.getFontResolver();//避免中文为空设置系统字体fontResolver.addFont("static/fonts/simsun.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);fontResolver.addFont("static/fonts/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);String url = "File:///" + path + "/";log.info("导出 文件地址  = {}", url);//根据参数集个数循环调用模板,追加到同一个pdf文档中//(注意:此处从1开始,因为第0是创建pdf,从1往后则向pdf中追加内容)for (int i = 0; i < listVars.size(); i++) {Document docAppend = generateDoc(templateEngine, templateName, listVars.get(i));renderer.setDocument(docAppend, null);renderer.getSharedContext().setBaseURL(url);//展现和输出pdfrenderer.layout();if (i == 0) {renderer.createPDF(out, false);} else {//写下一个pdf页面renderer.writeNextDocument();}}renderer.finishPDF(); //完成pdf写入}/*** pdf下载** @param templateEngine 配置* @param templateName   模板名称(带后缀.ftl)* @param listVars       模板参数集* @param response       HttpServletResponse* @param fileName       下载文件名称(带文件扩展名后缀)*/public static void download(TemplateEngine templateEngine, String templateName, List<Map<String, Object>> listVars, HttpServletResponse response, String fileName) {// 设置编码、文件ContentType类型、文件头、下载文件名response.setCharacterEncoding("utf-8");response.setContentType("multipart/form-data");try {response.setHeader("Content-Disposition", "attachment;fileName=" +new String(fileName.getBytes("gb2312"), "ISO8859-1"));} catch (UnsupportedEncodingException e) {log.error(e.getMessage(), e);}try (ServletOutputStream out = response.getOutputStream()) {generateAll(templateEngine, templateName, out, listVars);out.flush();} catch (Exception e) {log.error(e.getMessage(), e);}}public static void downloadWithImg(TemplateEngine templateEngine, String templateName, List<Map<String, Object>> listVars, HttpServletResponse response, String fileName, String path) {// 设置编码、文件ContentType类型、文件头、下载文件名response.setCharacterEncoding("utf-8");response.setContentType("multipart/form-data");try {response.setHeader("Content-Disposition", "attachment;fileName=" +new String(fileName.getBytes("gb2312"), "ISO8859-1"));} catch (UnsupportedEncodingException e) {log.error(e.getMessage(), e);}try (ServletOutputStream out = response.getOutputStream()) {generateAll(templateEngine, templateName, out, listVars, path);out.flush();} catch (Exception e) {log.error(e.getMessage(), e);}}/*** pdf预览** @param templateEngine 配置* @param templateName   模板名称(带后缀.ftl)* @param listVars       模板参数集* @param response       HttpServletResponse*/public static void preview(TemplateEngine templateEngine, String templateName, List<Map<String, Object>> listVars, HttpServletResponse response) {try (ServletOutputStream out = response.getOutputStream()) {generateAll(templateEngine, templateName, out, listVars);out.flush();} catch (Exception e) {log.error(e.getMessage(), e);}}public static void previewWithImg(TemplateEngine templateEngine, String templateName, List<Map<String, Object>> listVars, HttpServletResponse response, String path) {try (ServletOutputStream out = response.getOutputStream()) {generateAll(templateEngine, templateName, out, listVars, path);out.flush();} catch (Exception e) {log.error(e.getMessage(), e);}}/*** 生成pdf 指定文件绝对路径** @param templateEngine 配置* @param templateName   模板名称(带后缀.ftl)* @param listVars       模板参数集* @param filePath       文件路径*/public static void creatPdfFile(TemplateEngine templateEngine, String templateName, List<Map<String, Object>> listVars, String filePath) {FileOutputStream out = null;try {//新建文件File file = new File(filePath);// 创建复制路径File parent = file.getParentFile();if (!parent.exists()) {parent.mkdirs();}// 复制文件if (file.exists()) {file.createNewFile();}out = new FileOutputStream(file);generateAll(templateEngine, templateName, out, listVars);out.flush();} catch (Exception e) {log.error(e.getMessage(), e);} finally {if (null != out) {try {out.close();} catch (IOException e) {e.printStackTrace();}}}}/*** 多个PDF合并功能 要捕获错误信息，所以不用try-catch** @param files    多个PDF的路径* @param savePath 生成的新PDF绝对路径*/@SneakyThrowspublic static void mergePdfFiles(String[] files, String savePath) {if (files.length > 0) {
//            try {com.lowagie.text.Document document = new com.lowagie.text.Document(new PdfReader(files[0]).getPageSize(1));PdfCopy copy = new PdfCopy(document, new FileOutputStream(savePath));document.open();for (String file : files) {PdfReader reader = new PdfReader(file);int n = reader.getNumberOfPages();for (int j = 1; j <= n; j++) {document.newPage();PdfImportedPage page = copy.getImportedPage(reader, j);copy.addPage(page);}}document.close();
//            } catch (IOException | DocumentException e) {
//                e.printStackTrace();
//            }}}}

pdf.html 模版

多页模版

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" xmlns:layout="http://www.w3.org/1999/xhtml" layout:decorator="layout">
<head lang="en"><title></title><style>@media print {div.footer-content {display: block;font-family: SimSun;font-size: 16px;color: #000;text-align: left;margin-left: -490px;position: running(footer-content);}}@page {size: A4; /*设置纸张大小:A4(210mm 297mm)、A3(297mm 420mm) 横向则反过来*/margin: 1in;padding: 1em;}.page {page-break-after: always;font-size: 16px;font-family: SimSun;}/* 防止最后一页多空页 */.page:last-child {page-break-after: auto;}body {font-family: 'SimSun'}h1 {text-align: center;line-height: 60px;}table, th, td {border: 1px solid black;border-collapse: collapse;padding: 3px;font-size: 16px;height: 10px;}.half-cell {position: relative;}.footer {position: fixed;bottom: 10px;left: 0;width: 100%;font-size: 12px;margin-left: 10px;margin-right: 10px; /* 右边也留 */}.footer .right {text-align: right;margin-top: 30px;}</style>
</head>
<!--这样配置不中文不会显示-->
<!--<body style="font-family: 宋体">-->
<body style="font-family: 'SimSun'">
<!--第一页-->
<div class="page"><div style="width: 100%; overflow: hidden;"><!-- 左 --><div style="float: left; width: 40%;"><table style="width: 100%; border-collapse: collapse;text-align: center;"><colgroup><col style="width: 50%;" /><col style="width: 50%;" /></colgroup><tr class="expertTitle"><td>**</td><td th:text="${bjbh}"></td></tr><tr class="expertTitle"><td>**</td><td th:text="${bdh}"></td></tr><tr><td>**</td><td th:text="${fbType}"></td></tr></table></div><!-- 右 --><div style="float: right; width: 30%; text-align: right;"><img th:src="${photo}" alt="二维码" style="width: 100px; height: 100px;"/></div></div><h2 style="text-align: center;" data-pdf-bookmark-name="***">***</h2><div style="line-height: 20px;"><!-- 继续下面内容 --><div style="margin-top: 20px; font-size: 16px; margin-left: 10px; line-height: 1.8;"><span style="border-bottom: 1px solid #000; padding: 0 0px" th:text="${name}"></span> <span>：</span><p style="text-indent: 2em;">***</p></div><div><table style="text-align: center; width: 100%; border-collapse: collapse;" border="1"><colgroup><!-- 设置表格宽度 --><col style="width: 16.66%;" /><col style="width: 16.66%;" /><col style="width: 16.66%;" /><col style="width: 16.66%;" /><col style="width: 16.66%;" /><col style="width: 16.66%;" /></colgroup><tr><td>**</td><!-- 设置表格合并 --><td colspan="5" th:text="${jsdd}"></td></tr><tr style="height: 150px;"><td colspan="1">**</td><!-- 设置表格自动换行 --><td colspan="3" style="text-align: left; vertical-align: top; padding: 5px;"><span th:text="${zbdljg}"></span></td></tr></table></div></div><div class="footer" ><div>附注：</div><div>&#160;1. ****。</div><div class="right"><div>上****** 制&#160;&#160;</div><div>2020 版&#160;&#160;</div></div></div></div><div class="page"><div style="width: 100%; overflow: hidden;"><!-- 左 --><div style="float: left; width: 40%;text-align: center;"><table style="width: 100%; border-collapse: collapse;text-align: center;"><colgroup><col style="width: 50%;" /><col style="width: 50%;" /></colgroup><tr class="expertTitle"><td>**</td><td th:text="${bjbh}"></td></tr><tr class="expertTitle"><td>**</td><td th:text="${bdh}"></td></tr><tr><td>**</td><td th:text="${fbType}"></td></tr></table></div><!-- 右 --><div style="float: right; width: 30%; text-align: right;"><img th:src="${photo}" alt="二维码" style="width: 100px; height: 100px;"/></div></div><h2 style="text-align: center;" data-pdf-bookmark-name="专业工程暂估价明细表">专业工程暂估价明细表</h2><table style="width: 100%; border-collapse: collapse; font-weight: normal;text-align: center;" ><colgroup><col style="width: 20%;" /><col style="width: 20%;" /><col style="width: 20%;" /><col style="width: 20%;" /><col style="width: 20%;" /></colgroup><tr><td>序号</td><td>专业工程名称</td><td>专业类别</td><td>招标主体</td><td>金额(万元)</td></tr><!-- 循环 --><tr th:each="item, iterStat : ${list}" ><td th:text="${iterStat.count}"></td><td th:text="${item.projectName}"></td><td th:text="${item.projectType}"></td><td th:text="${item.bidEntity}"></td><td th:text="${item.amount}"></td></tr></table><div class="footer"><div>附注：</div><div>1. 本中标可通过二维码在上海市建筑业官方微信验证。</div><div class="right" style=" margin-right: 30px;"><div> *** 制&#160;&#160;</div><div>2020 版&#160;&#160;</div></div></div></div></body>
</html>
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