Java中将Html转换为PDF的方法和步骤

<dependency>
            <groupId> e-iceblue </groupId>
            <artifactId>spire.doc.free</artifactId>
            <version>3.9.0</version>
        </dependency>

    <repositories>
        <repository>
            <id>com.e-iceblue</id>
            <url>http://repo.e-iceblue.cn/repository/maven-public/</url>
        </repository>
    </repositories>

public class HtmlToPDFUtil {
 public static void main(String[] args) throws IOException{
        String inputHtml = "C:\\InputHtml.txt";
        //新建Document对象
        Document doc = new Document();
        //添加section
        Section sec = doc.addSection();
        String htmlText = readTextFromFile(inputHtml);
        //添加段落并写入HTML文本
        sec.addParagraph().appendHTML(htmlText);
        //将文档另存为PDF
        doc.saveToFile("C:\\HTMLstringToPDF.pdf", FileFormat.PDF);
        doc.dispose();
    }
 public static String readTextFromFile(String fileName) throws IOException {
        StringBuffer sb = new StringBuffer();
        BufferedReader br = new BufferedReader(new FileReader(fileName));
        String content;
        while ((content = br.readLine()) != null) {
            sb.append(content);
        }
        return sb.toString();
    }
}

 public static void main(String[] args) throws IOException{
        //新建Document对象
        Document doc = new Document();
        //添加section
        Section sec = doc.addSection();
        String htmlText = " <tr>\n" +
                "        <td colspan=\"8\">\n" +
                "          <div class=\"yiban\">\n" +
                "            <span class=\"jiachu\">联系电话：<span>18888888888</span></span>\n" +
                "          </div>\n" +
                "          <div class=\"yiban\">\n" +
                "            <span class=\"jiachu\">送货单号：</span><span>1567894</span>\n" +
                "          </div>\n" +
                "        </td>\n" +
                "      </tr>";
        //添加段落并写入HTML文本
        sec.addParagraph().appendHTML(htmlText);
        //将文档另存为PDF
        doc.saveToFile("C:\\HTMLstringToPDF.pdf", FileFormat.PDF);
        doc.dispose();
    }

 public static void downloadPdf(String fileName, String path) {
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletResponse response = requestAttributes.getResponse();
        response.setContentType("application/force-download");
        try {
            response.addHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes("utf-8"), "ISO8859-1"));
        } catch (Exception e) {
            e.printStackTrace();
        }
        File file = new File(path);
        InputStream is = null;
        ServletOutputStream os = null;
        try {
            is = new FileInputStream(file);
            os = response.getOutputStream();
            int b;
            while ((b = is.read()) != -1) {
                os.write(b);
            }
        } catch (FileNotFoundException e) {
            ExceptionUtils.logError(e);
        } catch (IOException e) {
            ExceptionUtils.logError(e);
        } finally {
            try {
                if (null != os) {
                    os.close();
                }
                if (null != is) {
                    is.close();
                }
            } catch (IOException e) {
                ExceptionUtils.logError(e);
            }
        }
    }

HtmlToPDFUtil.downloadPdf(fileName,tmplPath+fileName);