java html页面转pdf大全

前言：没有自己动手实践的代码你永远不知能不能用，前路漫漫，总要有人投石问路，才能放心复制粘贴，废话不多说了，直接上代码，请诸君掌眼！

1.spire for pdf

并非开源，需要付费，测试版有水印，估计大多数用户会弃之如敝履

        <!--spire--><dependency><groupId>e-iceblue</groupId><artifactId>spire.pdf.free</artifactId><version>3.9.0</version></dependency><!--仓库地址--><repository><id>com.e-iceblue</id><url>http://repo.e-iceblue.cn/repository/maven-public/</url></repository>@Testpublic void userSpireToPdf() {//定义需要转换的HTML（直接一个html页面是行不通的，可以访问的地址页面）String url = "http://localhost:8000/project/Doc";//转换后的结果文档（结果文档保存在Java项目程序文件下）String fileName = "C:\\Users\\admin\\Desktop\\新建文件夹\\spireToPdf.pdf";//解压后的插件本地地址（这里是把插件包放在了Java项目文件夹下，也可以自定义其他本地路径）String pluginPath = "D:\\plugins-window64";HtmlConverter.setPluginPath(pluginPath);//调用方法转换到PDF并设置PDF尺寸HtmlConverter.convert(url, fileName, true, 1000, new Size((float) PdfPageSize.A4.getWidth(), (float) PdfPageSize.A4.getHeight()), new PdfMargins(0));}

导出的pdf我就不给各位看官贴了，想测试可以把url换成百度之类的地址

2.itext

itex对html页面的样式，标签的闭合，字体的

    <!--itext to pdf--><dependency><groupId>org.xhtmlrenderer</groupId><artifactId>core-renderer</artifactId><version>R8</version></dependency><dependency><groupId>commons-codec</groupId><artifactId>commons-codec</artifactId></dependency><dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.5.1</version></dependency><dependency><groupId>com.itextpdf.tool</groupId><artifactId>xmlworker</artifactId><version>5.5.9</version></dependency>@Testpublic void testItextToPdf() {StringBuilder strline = new StringBuilder("");File fin = new File("C:\\Users\\admin\\Desktop\\新建文件夹\\htmltopdf.html");try (RandomAccessFile accessFile = new RandomAccessFile(fin, "r");FileChannel fcin = accessFile.getChannel();) {Charset charset = Charset.forName("UTF-8");int bufSize = 100000;ByteBuffer rBuffer = ByteBuffer.allocate(bufSize);String enterStr = "\n";byte[] bs = new byte[bufSize];StringBuilder strBuf = new StringBuilder("");while (fcin.read(rBuffer) != -1) {int rSize = rBuffer.position();rBuffer.rewind();rBuffer.get(bs);rBuffer.clear();String tempString = new String(bs, 0, rSize, charset);tempString = tempString.replaceAll("\r", "");int fromIndex = 0;int endIndex = 0;while ((endIndex = tempString.indexOf(enterStr, fromIndex)) != -1) {String line = tempString.substring(fromIndex, endIndex);line = strBuf.toString() + line;strline.append(line.trim());strBuf.delete(0, strBuf.length());fromIndex = endIndex + 1;}if (rSize > tempString.length()) {strline.append(tempString.substring(fromIndex, tempString.length()));strBuf.append(tempString.substring(fromIndex, tempString.length()));} else {strline.append(tempString.substring(fromIndex, rSize));strBuf.append(tempString.substring(fromIndex, rSize));}}String htmlString = "";htmlString = strline.toString().replaceAll("\"", "'").replaceAll("<style>", "<style>body{font-family:SimSun;font-size:14px;}");    //注意这里为啥要写这个，主要是替换成这样的字体，如果不设置中文有可能显示不出来。OutputStream os = new FileOutputStream("C:\\Users\\admin\\Desktop\\新建文件夹\\itextToPdf.pdf");    //生成PDF文件的路径ITextRenderer renderer = new ITextRenderer();ITextFontResolver font = renderer.getFontResolver();font.addFont("C:/WINDOWS/Fonts/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);//添加中文识别，这里是设置的宋体，Linux下要换成对应的字体renderer.setDocumentFromString(htmlString.toString());renderer.layout();renderer.createPDF(os);renderer.finishPDF();} catch (Exception e) {System.out.println(e);}}

html代码

<!DOCTYPE html>
<html lang="en">
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title>认识table表标签</title><style type="text/css">/*解决html转pdf文件中文不显示的问题*/body {font-family: SimSun;}/*设定纸张大小*//* A4纸 *//* @page{size:210mm*297mm} */@page{size:a4}p {color: red;}</style>
</head>
<body><table border="1px"><caption>我的标题</caption><tbody><tr><th>班级</th><th>学生数</th><th>平均成绩</th><th>班级</th><th>学生数</th><th>平均成绩</th><th>班级</th><th>学生数</th><th>平均成绩</th></tr><tr><td>一班</td><td>30</td><td>89</td><td>一班</td><td>30</td><td>89</td><td>一班</td><td>30</td><td>89</td></tr><tr><td>一班</td><td>30</td><td>89</td><td>一班</td><td>30</td><td>89</td><td>一班</td><td>30</td><td>89</td></tr><tr><td>一班</td><td>30</td><td>89</td><td>一班</td><td>30</td><td>89</td><td>一班</td><td>30</td><td>89</td></tr></tbody></table><p>《侠客行》<br/>年代: 唐 作者: 李白<br/>赵客缦胡缨，吴钩霜雪明。银鞍照白马，飒沓如流星。<br/>十步杀一人，千里不留行。事了拂衣去，深藏身与名。<br/>闲过信陵饮，脱剑膝前横。将炙啖朱亥，持觞劝侯嬴。<br/>三杯吐然诺，五岳倒为轻。眼花耳热后，意气素霓生。<br/>救赵挥金槌，邯郸先震惊。千秋二壮士，煊赫大梁城。<br/>纵死侠骨香，不惭世上英。谁能书閤下，白首太玄经。<br/></p><img src="https://tpc.googlesyndication.com/simgad/17749066154578206954"/>
</body>
</html>

效果：

3.Flying saucer +itext

<dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.5.13</version>
</dependency>
<dependency><groupId>com.itextpdf.tool</groupId><artifactId>xmlworker</artifactId><version>5.5.13</version>
</dependency>
<dependency><groupId>com.itextpdf</groupId><artifactId>itext-asian</artifactId><version>5.2.0</version>
</dependency>
<dependency><groupId>org.xhtmlrenderer</groupId><artifactId>flying-saucer-pdf</artifactId><version>9.0.3</version>
</dependency>

@Testpublic void useFlyingSaucerToPdf() throws IOException {String pdfName = "项目立项报告 .pdf";String htmlStr = readFileToString(new File("C:\\Users\\admin\\Desktop\\新建文件夹\\a.html"));this.htmlToPdf(htmlStr, pdfName, "C:\\Windows\\Fonts");}private String readFileToString(File fin) throws IOException {StringBuilder strline = new StringBuilder("");try (RandomAccessFile accessFile = new RandomAccessFile(fin, "r");FileChannel fcin = accessFile.getChannel();) {Charset charset = Charset.forName("UTF-8");int bufSize = 100000;ByteBuffer rBuffer = ByteBuffer.allocate(bufSize);String enterStr = "\n";byte[] bs = new byte[bufSize];StringBuilder strBuf = new StringBuilder("");while (fcin.read(rBuffer) != -1) {int rSize = rBuffer.position();rBuffer.rewind();rBuffer.get(bs);rBuffer.clear();String tempString = new String(bs, 0, rSize, charset);tempString = tempString.replaceAll("\r", "");int fromIndex = 0;int endIndex = 0;while ((endIndex = tempString.indexOf(enterStr, fromIndex)) != -1) {String line = tempString.substring(fromIndex, endIndex);line = strBuf.toString() + line;strline.append(line.trim());strBuf.delete(0, strBuf.length());fromIndex = endIndex + 1;}if (rSize > tempString.length()) {strline.append(tempString.substring(fromIndex, tempString.length()));strBuf.append(tempString.substring(fromIndex, tempString.length()));} else {strline.append(tempString.substring(fromIndex, rSize));strBuf.append(tempString.substring(fromIndex, rSize));}}String htmlString = "";htmlString = strline.toString().replaceAll("\"", "'").replaceAll("<style>", "<style>body{font-family:SimSun;font-size:14px;}");return htmlString;}}private void htmlToPdf(String html, String pdfName, String fontDir) {try {ByteArrayOutputStream os = new ByteArrayOutputStream();// 解决中文支持问题ITextRenderer renderer = new ITextRenderer();ITextFontResolver fontResolver = renderer.getFontResolver();fontResolver.addFont("C:/Windows/fonts/SimSun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
//
//                ITextFontResolver fontResolver = (ITextFontResolver) renderer.getSharedContext().getFontResolver();
//                //添加字体库 begin
//                File f = new File(fontDir);
//                if (f.isDirectory()) {
//                    File[] files = f.listFiles(new FilenameFilter() {
//                        public boolean accept(File dir, String name) {
//                            String lower = name.toLowerCase();
//                            return lower.endsWith(".otf") || lower.endsWith(".ttf") || lower.endsWith(".ttc");
//                        }
//                    });
//                    for (int i = 0; i < files.length; i++) {
//                        fontResolver.addFont(files[i].getAbsolutePath(), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
//                    }
//                }//添加字体库endrenderer.setDocumentFromString(html);renderer.layout();renderer.createPDF(os);renderer.finishPDF();byte[] buff = os.toByteArray();//保存到磁盘上byte2File(buff, "C:\\Users\\admin\\Desktop\\新建文件夹\\", pdfName);} catch (Exception e) {e.printStackTrace();}}private byte[] file2Byte(String filePath) {ByteArrayOutputStream bos = null;BufferedInputStream in = null;try {File file = new File(filePath);if (!file.exists()) {throw new FileNotFoundException("file not exists");}bos = new ByteArrayOutputStream((int) file.length());in = new BufferedInputStream(new FileInputStream(file));int buf_size = 1024;byte[] buffer = new byte[buf_size];int len = 0;while (-1 != (len = in.read(buffer, 0, buf_size))) {bos.write(buffer, 0, len);}return bos.toByteArray();} catch (Exception e) {System.out.println(e.getMessage());e.printStackTrace();return null;} finally {try {if (in != null) {in.close();}if (bos != null) {bos.close();}} catch (Exception e) {System.out.println(e.getMessage());e.printStackTrace();}}}private void byte2File(byte[] bfile, String filePath, String fileName) {BufferedOutputStream bos = null;FileOutputStream fos = null;File file = null;try {File dir = new File(filePath);if (!dir.exists() && !dir.isDirectory()) {//判断文件目录是否存在dir.mkdirs();}file = new File(filePath + fileName);fos = new FileOutputStream(file);bos = new BufferedOutputStream(fos);bos.write(bfile);} catch (Exception e) {System.out.println(e.getMessage());e.printStackTrace();} finally {try {if (bos != null) {bos.close();}if (fos != null) {fos.close();}} catch (Exception e) {System.out.println(e.getMessage());e.printStackTrace();}}}

flying saucer 是基于itext的，对css样式有更好的支持，我是没耐心写测试复杂的html页面，测试能用

html页面指定字体，不然不识别汉字，毕竟是!Chinese开发的

<head>

<style type="text/CSS">

body{font-family:"SimSun"}

</style>

</head>

4.git上找的项目，用freemark+itext+flyingsaucer+模板实现的

我贴关键代码，给你们github链接，下载之后把jdk版本改一下可以用：https://github.com/youzhibing/itextpdf

代码我就不贴了，给你们看一下效果吧

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