使用示例

1、简单使用

package com.pengshiyu;
import com.itextpdf.text.Document;
import com.itextpdf.text.Font;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfWriter;
import java.io.FileOutputStream;
 * Hello world!
public class PdfDemo {
    public static void main(String[] args) throws Exception {
        // 新建文档
        Document document = new Document(PageSize.A4);
        // 如果输出中文，需要设置中文字体
        BaseFont chineseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
        Font font = new Font(chineseFont, 12, Font.NORMAL);
        PdfWriter.getInstance(document, new FileOutputStream("hello.pdf"));
        // 打开文档
        document.open();
        // 写入内容
        Paragraph paragraph = new Paragraph("hello world 你好世界", font);
        document.add(paragraph);
        // 关闭文档
        document.close();

2、稍复杂的示例

package com.pengshiyu;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.text.pdf.codec.Base64;
import com.itextpdf.tool.xml.XMLWorker;
import com.itextpdf.tool.xml.XMLWorkerFontProvider;
import com.itextpdf.tool.xml.css.StyleAttrCSSResolver;
import com.itextpdf.tool.xml.html.CssAppliers;
import com.itextpdf.tool.xml.html.CssAppliersImpl;
import com.itextpdf.tool.xml.html.Tags;
import com.itextpdf.tool.xml.parser.XMLParser;
import com.itextpdf.tool.xml.pipeline.css.CSSResolver;
import com.itextpdf.tool.xml.pipeline.css.CssResolverPipeline;
import com.itextpdf.tool.xml.pipeline.end.PdfWriterPipeline;
import com.itextpdf.tool.xml.pipeline.html.AbstractImageProvider;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipeline;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipelineContext;
import java.io.*;
public class App {
     * 创建PDF文件
     * @param htmlStr
     * @throws Exception
    private static void writeToOutputStreamAsPDF(String htmlStr) throws Exception {
        String targetFile = "pdfDemo.pdf";
        File targeFile = new File(targetFile);
        if (targeFile.exists()) {
            targeFile.delete();
        //定义pdf文件尺寸，采用A4横切
        Document document = new Document(PageSize.A4, 25, 25, 15, 40);// 左、右、上、下间距
        //定义输出路径
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(targetFile));
        // PdfReportHeaderFooter header = new PdfReportHeaderFooter("", 8, PageSize.A4);
        // writer.setPageEvent(header);
        writer.addViewerPreference(PdfName.PRINTSCALING, PdfName.NONE);
        document.open();
        // CSS
        CSSResolver cssResolver = new StyleAttrCSSResolver();
        CssAppliers cssAppliers = new CssAppliersImpl(new XMLWorkerFontProvider() {
            @Override
            public Font getFont(String fontname, String encoding, boolean embedded, float size, int style, BaseColor color) {
                try {
                    //用于中文显示的Provider
                    BaseFont bfChinese = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
                    return new Font(bfChinese, size, style);
                } catch (Exception e) {
                    return super.getFont(fontname, encoding, size, style);
        //html
        HtmlPipelineContext htmlContext = new HtmlPipelineContext(cssAppliers);
        htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());
        htmlContext.setImageProvider(new AbstractImageProvider() {
            @Override
            public Image retrieve(String src) {
                //支持图片显示
                int pos = src.indexOf("base64,");
                try {
                    if (src.startsWith("data") && pos > 0) {
                        byte[] img = Base64.decode(src.substring(pos + 7));
                        return Image.getInstance(img);
                    } else if (src.startsWith("http")) {
                        return Image.getInstance(src);
                } catch (BadElementException ex) {
                    return null;
                } catch (IOException ex) {
                    return null;
                return null;
            @Override
            public String getImageRootPath() {
                return null;
        // Pipelines
        PdfWriterPipeline pdf = new PdfWriterPipeline(document, writer);
        HtmlPipeline html = new HtmlPipeline(htmlContext, pdf);
        CssResolverPipeline css = new CssResolverPipeline(cssResolver, html);
        // XML Worker
        XMLWorker worker = new XMLWorker(css, true);
        XMLParser p = new XMLParser(worker);
        p.parse(new ByteArrayInputStream(htmlStr.getBytes()));
        document.close();
     * 读取 HTML 文件
     * @return
    private static String readHtmlFile() {
        StringBuffer textHtml = new StringBuffer();
        try {
            File file = new File("printDemo.html");
            BufferedReader reader = new BufferedReader(new FileReader(file));
            String tempString = null;
            // 一次读入一行，直到读入null为文件结束
            while ((tempString = reader.readLine()) != null) {
                textHtml.append(tempString);
            reader.close();
        } catch (IOException e) {
            return null;
        return textHtml.toString();
    public static void main(String[] args) throws Exception {
        // 读取html文件
        String htmlStr = readHtmlFile();
        // 将html文件转成PDF
        writeToOutputStreamAsPDF(htmlStr);
<head></head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>出库单</title>
        <table width="100%" border="0" cellspacing="0" cellpadding="0">
            <tbody>
                <td height="40" colspan="2"><h3 style="font-weight: bold; text-align: center; letter-spacing: 5px; font-size: 24px;">入库单</h3></td>
                <td width="12%" height="20" rowspan="2">
                    <img style="width: 105px;height: 105px;" src="data:image/jpeg;base64,iVBORw0KGgoAAAANSUhEUgAAAH0AAAB9AQAAAACn+1GIAAAAqElEQVR42u3VMQ7DMAwDQP6A//8lx24qKRRw0s1yu8Uw4OQGIaHsBHUfLzzwAxCAInoZg6dI9dUUBIOyHEG56CmodAaxwtfbboLTVWpeU9+EDAH37m9CmkTYxDGUE0agMIakk3y4Ut8G37iom02M4bPniHWAtqFDTjjSGLrZvXAOmTnL1124C73r6Yo8Ane61k6eQeVjIM2h482D1RwScrpNjuH5R/0b3s6ZZNyKlt3iAAAAAElFTkSuQmCC" />
                <td width="50%" height="30">操作人：xxx</td>
                <td width="50%" height="30" colspan="2">创建时间：2021-09-14 12:00:00</td>
            </tbody>
        </table>
    <div style="margin-top: 5px; margin-bottom: 6px; margin-left: 4px"></div>
        <table width="100%"
               style="border-collapse: collapse; border-spacing: 0;border:0px;">
            <tr style="height: 25px;">
                <td style="background: #eaeaea; text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;"
                    width="10%">序号</td>
                <td style="background: #eaeaea; text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;"
                    width="30%">商品</td>
                <td style="background: #eaeaea; text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;"
                    width="30%">单位</td>
                <td style="background: #eaeaea; text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-right: 1px solid #000000;"
                    width="30%">数量</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">1</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">xxx沐浴露</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">箱</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-right: 1px solid #000000;">3</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">2</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">xxx洗发水</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">箱</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-right: 1px solid #000000;">4</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">3</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">xxx洗衣粉</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000;">箱</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-right: 1px solid #000000;">5</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-bottom: 1px solid #000000;">4</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-bottom: 1px solid #000000;">xxx洗面奶</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-bottom: 1px solid #000000;">箱</td>
                <td style="text-align: center; border-left: 1px solid #000000; border-top: 1px solid #000000; border-right: 1px solid #000000; border-bottom: 1px solid #000000;">5</td>
        </table>
</body>
</html>

参考

手把手教你使用Java开发在线生成pdf文档

java实现pdf电子合同设置合同编号

现在有一些用户信息合同,要求在合同上添加合同编号,合同编号要求按照一定规则系统生成.看过很多同学的实现方案,也尝试过很多,为了方便以后有同样需求的同学可以节省时间,进行了相关内容的梳理.

大家都知道 Github 是一个程序员福地，这里有各种厉害的开源框架、软件或者教程。这些东西对于我们学习和进步有着莫大的进步，所以我有了这个将 Github 上非常棒的 Java 开源项目整理下来的想法。觉得不错的话，欢迎小伙伴们去star一波。很多小伙伴都不知道学习什么开源项目，这篇文章定能为你解决疑惑。不论你想要看 Java 教程方向的开源项目、Java实战项目、SpringBoot教程还是说想要看微服务、分布式相关的开源项目，你都可以在上面找到需要的资源！不论是校招还是社招都避免不了各种面试。笔试，如何去准备这些东西就显得格外重要。不论是笔试还是面试都是有章可循的，我这个有章可循‘说的意思只是说应对技术面试是可以提前准备。运筹帷幄之后，决胜千里之外!不打毫无准备的仗,我觉得大家可以先从下面几个方面来准备面试: