Java开源工具iText生成PDF文件

谁借莪１个温暖的怀抱￠ 2022-07-05 15:29 383阅读 0赞

iText是一个非常著名的能够**快速产生PDF文件的Java类库**。支持文本，表格，图形的操作，可以方便的跟Servlet进行结合。iText不仅可以生成PDF或rtf的文档，而且可以将XML、Html文件转化为PDF文件。

iText官网：[http://itextpdf.com/][http_itextpdf.com]

**1、maven**

<dependency>
        <groupId>com.itextpdf</groupId>
        <artifactId>itextpdf</artifactId>
        <version>5.5.10</version>
    </dependency>

**2、代码**

import com.itextpdf.text.*;
    import com.itextpdf.text.html.simpleparser.HTMLWorker;
    import com.itextpdf.text.pdf.*;
    import com.itextpdf.text.pdf.parser.PdfTextExtractor;
    
    import java.io.*;
    import java.util.Date;
    import java.util.zip.ZipEntry;
    import java.util.zip.ZipOutputStream;
    
    
    public class PDFUtil { 
    
        /* * 1、简单的生成一个pdf文件 */
        public static void createPDFOne(String fileName){
            //Step 1—Create a Document.
            Document document = new Document();
            try {
                //Step 2—Get a PdfWriter instance.
                PdfWriter.getInstance(document, new FileOutputStream(fileName));
                //Step 3—Open the Document.
                document.open();
                //Step 4—Add content.
                document.add(new Paragraph("Hello World！"));
                //Step 5—Close the Document.
                document.close();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                // step 5
                document.close();
            }
        }
    
        /** * 2、生成包含页面大小,页面背景色,页边空白,Title,Author,Subject,Keywords的pdf文件 */
        public static void createPDFTwo(String filename) {
    
            //页面大小
            Rectangle rect = new Rectangle(PageSize.A4);
            //页面背景色
            rect.setBackgroundColor(BaseColor.ORANGE);
    
            Document document = new Document(rect);
            try {
                PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(filename));
                //PDF版本
                writer.setPdfVersion(PdfWriter.VERSION_1_7);
    
                //文档属性
                document.addTitle("create pdf file");
                document.addAuthor("eff666");
                document.addSubject("This is the subject of the PDF file.");
                document.addKeywords("This is the keyword of the PDF file.");
    
                document.open();
    
                //文档正文内容
                document.add(new Paragraph("Hello World!"));
                document.add(new Paragraph(new Date().toString()));
    
    
                //添加Page
                document.newPage();
                writer.setPageEmpty(false);
    
                document.add(new Paragraph("Second page"));
                document.newPage();
    
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                document.close();
            }
        }
    
        /** * 3、设置密码 * @param fileName */
        public static void createPDFThree(String fileName){
            //页面大小
            Rectangle rect = new Rectangle(PageSize.A4);
            //页面背景色
            rect.setBackgroundColor(BaseColor.ORANGE);
    
            Document document = new Document(rect);
            try {
                PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(fileName));
    
                // 设置密码为："World"
    // writer.setEncryption("Hello".getBytes(), "World".getBytes(),
    // PdfWriter.ALLOW_SCREENREADERS,
    // PdfWriter.STANDARD_ENCRYPTION_128);
                writer.setEncryption("Hello".getBytes(), "World".getBytes(), PdfWriter.ALLOW_COPY
                        | PdfWriter.ALLOW_PRINTING, PdfWriter.STANDARD_ENCRYPTION_128);
    
    
                document.open();
                document.add(new Paragraph("Hello World"));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                document.close();
            }
        }
    
        /** * 4、插入Chunk, Phrase, Paragraph, List * @param fileName */
        public static void createPDFFour(String fileName){
            //页面大小
            Rectangle rect = new Rectangle(PageSize.A4);
            //页面背景色
            rect.setBackgroundColor(BaseColor.WHITE);
            Document document = new Document(rect);
            try {
                PdfWriter.getInstance(document, new FileOutputStream(fileName));
                document.open();
                //Chunk对象: a String, a Font, and some attributes
                document.add(new Chunk("Java"));
                document.add(new Chunk(" "));
                Font font = new Font(Font.FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE);
                Chunk id = new Chunk("99", font);
                id.setBackground(BaseColor.BLACK, 1f, 0.5f, 1f, 1.5f);
                id.setTextRise(6);
                document.add(id);
                document.add(Chunk.NEWLINE);
    
                document.add(new Chunk("C++"));
                document.add(new Chunk(" "));
                Font font2 = new Font(Font.FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE);
                Chunk id2 = new Chunk("99", font2);
                id2.setBackground(BaseColor.BLACK, 1f, 0.5f, 1f, 1.5f);
                id2.setTextRise(6);
                id2.setUnderline(0.2f, -2f);
                document.add(id2);
                document.add(Chunk.NEWLINE);
    
                //Phrase对象: a List of Chunks with leading
                document.newPage();
                document.add(new Phrase("Second page"));
    
                Phrase director = new Phrase();
                Chunk name = new Chunk("Java");
                name.setUnderline(0.2f, -2f);
                director.add(name);
                director.add(new Chunk(","));
                director.add(new Chunk(" "));
                director.add(new Chunk("98"));
                director.setLeading(24);
                document.add(director);
    
                Phrase director2 = new Phrase();
                Chunk name2 = new Chunk("C++");
                name2.setUnderline(0.2f, -2f);
                director2.add(name2);
                director2.add(new Chunk(","));
                director2.add(new Chunk(" "));
                director2.add(new Chunk("98"));
                director2.setLeading(24);
                document.add(director2);
    
                //Paragraph对象: a Phrase with extra properties and a newline
                document.newPage();
                document.add(new Paragraph("Third page"));
    
                Paragraph info = new Paragraph();
                info.add(new Chunk("Java "));
                info.add(new Chunk("97"));
                info.add(Chunk.NEWLINE);
                info.add(new Phrase("C++ "));
                info.add(new Phrase("97"));
                document.add(info);
    
                //List对象: a sequence of Paragraphs called ListItem
                document.newPage();
                document.add(new Paragraph("Fourth page"));
                List list = new List(List.ORDERED);
                for (int i = 0; i < 10; i++) {
                    ListItem item = new ListItem(String.format("%s: %d movies", "country" + (i + 1), (i + 1) * 100),
                            new Font(Font.FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE));
                    List movielist = new List(List.ORDERED, List.ALPHABETICAL);
                    movielist.setLowercase(List.LOWERCASE);
    
                    for (int j = 0; j < 2; j++) {
                        ListItem movieitem = new ListItem("Title" + (j + 1));
                        List directorlist = new List(List.UNORDERED);
                        for (int k = 0; k < 3; k++) {
                            directorlist.add(String.format("%s, %s", "Name1" + (k + 1), "Name2" + (k + 1)));
                        }
                        movieitem.add(directorlist);
                        movielist.add(movieitem);
                    }
                    item.add(movielist);
                    list.add(item);
                }
                document.add(list);
            } catch (IOException e){
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                document.close();
            }
        }
    
        /** * 5、插入Anchor, Image, Chapter, Section * @param fileName */
        public static void createPDFFive(String fileName){
            //页面大小
            Rectangle rect = new Rectangle(PageSize.A4);
            //页面背景色
            rect.setBackgroundColor(BaseColor.WHITE);
    
            Document document = new Document(rect);
            try {
                PdfWriter.getInstance(document, new FileOutputStream(fileName));
                document.open();
    
                //Anchor对象: internal and external links
                Paragraph country = new Paragraph();
                Anchor dest = new Anchor("Java", new Font(Font.FontFamily.HELVETICA, 14, Font.BOLD, BaseColor.BLUE));
                dest.setName("Java");
                dest.setReference("http://www.java.com");//external
                country.add(dest);
                country.add(String.format(": %d people", 10000));
                document.add(country);
    
                document.newPage();
                Anchor toUS = new Anchor("Go to first page.", new Font(Font.FontFamily.HELVETICA, 14, Font.BOLD, BaseColor.BLUE));
                toUS.setReference("#CN");//internal
                document.add(toUS);
    
                //Image对象
                document.newPage();
                Image img = Image.getInstance("F:\\pdf\\1483795948_7815.png");
                img.setAlignment(Image.LEFT | Image.TEXTWRAP);
                img.setBorder(Image.BOX);
                img.setBorderWidth(10);
                img.setBorderColor(BaseColor.WHITE);
                img.scaleToFit(1000, 72);//大小
                img.setRotationDegrees(-30);//旋转
                document.add(img);
    
                //Chapter, Section对象（目录）
                document.newPage();
                Paragraph title = new Paragraph("Title");
                Chapter chapter = new Chapter(title, 1);
    
                title = new Paragraph("Section A");
                Section section = chapter.addSection(title);
                section.setBookmarkTitle("bmk");
                section.setIndentation(30);
                section.setBookmarkOpen(false);
                section.setNumberStyle(Section.NUMBERSTYLE_DOTTED_WITHOUT_FINAL_DOT);
    
                Section subsection = section.addSection(new Paragraph("Sub Section A"));
                subsection.setIndentationLeft(20);
                subsection.setNumberDepth(1);
    
                document.add(chapter);
    
    
            } catch (IOException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                document.close();
            }
        }
    
        /** * 6、位置调整 * @param fileName */
        public static void createPDFSix(String fileName){
            //页面大小
            Rectangle rect = new Rectangle(PageSize.A4);
            //页面背景色
            rect.setBackgroundColor(BaseColor.WHITE);
    
            Document document = new Document(rect);
            try {
                PdfWriter.getInstance(document, new FileOutputStream(fileName));
                document.open();
    
                Paragraph p = new Paragraph("iText是一个非常著名的能够快速产生PDF文件的Java类库。支持文本，表格，图形的操作，可以方便的跟Servlet进行结合。iText不仅可以生成PDF或rtf的文档，而且可以将XML、Html文件转化为PDF文件。");
                //默认
                p.setAlignment(Element.ALIGN_JUSTIFIED);
                document.add(p);
    
                document.newPage();
                p.setAlignment(Element.ALIGN_JUSTIFIED);
                p.setIndentationLeft(1 * 15f);
                p.setIndentationRight((5 - 1) * 15f);
                document.add(p);
    
                //居右
                document.newPage();
                p.setAlignment(Element.ALIGN_RIGHT);
                p.setSpacingAfter(15f);
                document.add(p);
    
                //居左
                document.newPage();
                p.setAlignment(Element.ALIGN_LEFT);
                p.setSpacingBefore(15f);
                document.add(p);
    
                //居中
                document.newPage();
                p.setAlignment(Element.ALIGN_CENTER);
                p.setSpacingAfter(15f);
                p.setSpacingBefore(15f);
                document.add(p);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                document.close();
            }
        }
    
    
        /** * 7、压缩PDF到Zip * @param fileName */
        public static void createPDFSeven(String fileName){
            //页面大小
           // Document document = new Document();
            ZipOutputStream zip = null;
            try {
                zip = new ZipOutputStream(new FileOutputStream(fileName));
                for (int i = 1; i <= 3; i++) {
                    ZipEntry entry = new ZipEntry("pdf_00" + i + ".pdf");
                    zip.putNextEntry(entry);
                    Document document = new Document();
                    PdfWriter writer = PdfWriter.getInstance(document, zip);
                    writer.setCloseStream(false);
                    document.open();
                    document.add(new Paragraph("Hello " + i));
                    document.close();
                    zip.closeEntry();
                }
    
            } catch (IOException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                try {
                    zip.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    
    
        /** * 8、HTML 转为 PDF * @param fileName */
        public static void createPDFEight(String fileName){
            Document document = new Document(PageSize.LETTER);
            try {
                PdfWriter.getInstance(document, new FileOutputStream(fileName));
                document.open();
                HTMLWorker htmlWorker = new HTMLWorker(document);
                htmlWorker.parse(new StringReader("<h1>This is a test!<body>\ntest</body></h1>"));
                document.close();
    
            } catch (IOException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            } finally {
                document.close();
            }
        }
    
    
        /** * 9、读取pdf文件内容 * @param path */
        private static void readPDF(String path)
        {
            //byte[] contentBytes;
            //String byteToStr;
            String content = "";
            int pageNum = 0;
            try {
                PdfReader reader = new PdfReader(path);
    
                pageNum = reader.getNumberOfPages();//获得页数
                for (int i = 1; i < pageNum; i++) {
       // 从第1页开始读
                    //contentBytes = reader.getPageContent(i);
                    content += PdfTextExtractor.getTextFromPage(reader, i);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            System.out.println(content);
        }
    }

[http_itextpdf.com]: http://itextpdf.com/