一、什么是iText？

在企业的信息系统中，报表处理一直占比较重要的作用，iText是一种生成PDF报表的Java组件。通过在服务器端使用Jsp或JavaBean生成PDF报表，客户端采用超链接显示或下载得到生成的报表，这样就很好的解决了B/S系统的报表处理问题。

二、引入jar

1、项目要使用iText，必须引入jar包
<dependency>
   <groupId>com.itextpdf</groupId>
   <artifactId>itextpdf</artifactId>
   <version>5.5.6</version>
</dependency>

2、输出中文，还要引入下面itext-asian.jar包
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-asian</artifactId>
<version>5.2.0</version>
</dependency>

3、设置pdf文件密码，还要引入下面bcprov-jdk15on.jar包
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.47</version>
</dependency>

三、iText常用类

com.itextpdf.text.Document：这是iText库中最常用的类，它代表了一个 pdf 实例。如果你需要从零开始生成一个pdf文件，你需要使用这个Document类。首先创建该实例，然后打开它，并添加内容，最后关闭该实例，即可生成一个pdf文件。
com.itextpdf.text.Paragraph：表示一个缩进的文本段落，在段落中，你可以设置对齐方式，缩进，段落前后间隔等
com.itextpdf.text.Chapter：表示 pdf 的一个章节，他通过一个Paragraph类型的标题和整形章数创建
com.itextpdf.text.Font：这个类包含了所有规范好的字体，包括family of font，大小，样式和颜色，所有这些字体都被声明为静态常量
com.itextpdf.text.List：表示一个列表；
com.itextpdf.text.Anchor：表示一个锚，类似于HTML页面的链接。
com.itextpdf.text.pdf.PdfWriter：当这个PdfWriter被添加到PdfDocument后，所有添加到Document的内容将会写入到与文件或网络关联的输出流中。
com.itextpdf.text.pdf.PdfReader：用于读取 pdf 文件；

四、生成PDF步骤

1、创建文档

Document document = new Document();

2、通过书写器将文档写入磁盘

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(FILE_DIR + "createPDFWithColor.pdf"));

3、打开文档

document.open();

4、向文档中添加内容

document.add(new Paragraph("i love CSDN"));

5、关闭文档

document.close();

package com.neusoft.guor.itext;import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;import com.itextpdf.text.*;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.PdfAction;
import com.itextpdf.text.pdf.PdfAnnotation;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfOutline;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.pdf.PdfString;
import com.itextpdf.text.pdf.PdfTransition;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.text.pdf.draw.DottedLineSeparator;
import com.itextpdf.text.pdf.draw.LineSeparator;
import com.itextpdf.text.pdf.draw.VerticalPositionMark;/*** itext PDF操作*/
public class PDFInit {public static final String FILE_DIR = "E:\\guor\\itext\\";public static final String const_JPG_JAVA = FILE_DIR + "java.jpg";public static final String const_JPG_NGINX = FILE_DIR + "nginx.jpg";private static final String const_NEZHA = "哪吒编程";private static final String const_NEZHA_PROGRAM = "获取Java学习资料请关注公众号：哪吒编程";private static final String const_BIBIDONG = "比比东";private static final String const_YUNYUN = "云韵";private static final String const_BAIDU = "百度一下 你就知道";private static final String const_BAIDU_URL = "https://www.baidu.com";private static final String const_PAGE_FIRST = "第一页";private static final String const_PAGE_SECOND = "第二页";private static final String const_PAGE_THIRD = "第三页";private static final String const_PAGE_FOUR = "第四页";private static final String const_PAGE_FIVE = "第五页";private static final String const_TITLE_FIRST = "一级标题";private static final String const_TITLE_SECOND = "二级标题";private static final String const_CONTENT = "内容";// 普通中文字体public static Font static_FONT_CHINESE = null;// 超链字体public static Font static_FONT_LINK = null;private static void pdfFontInit() throws IOException, DocumentException {// 微软雅黑BaseFont chinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);// 普通中文字体static_FONT_CHINESE = new Font(chinese, 12, Font.NORMAL);// Font.BOLD为加粗// 超链字体static_FONT_LINK = new Font(chinese, 12, Font.NORMAL, BaseColor.BLUE);}public static Document document;public static void main(String[] args) throws Exception {pdfFontInit();//createPDF();// 生成一个 PDF 文件//createPDFWithColor();// 设置PDF的页面大小和背景颜色//createPDFWithPassWord();// 创建带密码的PDF//createPDFWithNewPages();// 为PDF添加页//createPDFWithWaterMark();// 为PDF文件添加水印，背景图//createPDFWithContent();//插入块Chunk, 内容Phrase, 段落Paragraph, List//createPDFWithExtraContent();//插入Anchor, Image, Chapter, Section//draw();//画图//createPDFWithAlignment();//设置段落//createPDFToDeletePage();//删除 page//insertPage();// 插入 page//splitPDF();//分割 page//mergePDF();// 合并 PDF 文件//sortpage();// 排序page//setHeaderFooter();// 页眉，页脚//addColumnText();// 左右文字//setView();// 文档视图//pdfToZip();// 压缩PDF到ZipaddAnnotation();// 注释}/*** 创建一个 PDF 文件，并添加文本*/public static void createPDF() throws IOException, DocumentException {// 实例化 documentdocument = new Document();// 生成文件String path = FILE_DIR + "createPDF.pdf";File file = new File(path);if(!file.exists()){file.createNewFile();}PdfWriter.getInstance(document, new FileOutputStream(FILE_DIR + "createPDF.pdf"));// 打开 documentdocument.open();// 添加文本 此处无法写入中文 TODOdocument.add(new Paragraph(const_NEZHA));document.add(new Paragraph(const_NEZHA, static_FONT_CHINESE));// 关闭 documentdocument.close();}/*** 创建PDF文件，修改文件的属性*/public static void createPDFWithColor() throws FileNotFoundException, DocumentException {// 页面大小Rectangle rect = new Rectangle(PageSize.A5.rotate());// 页面背景色rect.setBackgroundColor(BaseColor.YELLOW);document = new Document(rect);PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(FILE_DIR + "createPDFWithColor.pdf"));// PDF版本(默认1.4)writer.setPdfVersion(PdfWriter.VERSION_1_6);// 文档属性document.addAuthor(const_NEZHA);document.addTitle("我的第一个pdf");// 页边空白document.setMargins(10, 10, 10, 10);// 打开document.open();document.add(new Paragraph(const_NEZHA, static_FONT_CHINESE));// 关闭document.close();}/*** 创建带密码的PDF*/public static void createPDFWithPassWord() throws FileNotFoundException, DocumentException {// 页面大小Rectangle rect = new Rectangle(PageSize.A5.rotate());// 页面背景色rect.setBackgroundColor(BaseColor.YELLOW);document = new Document(rect);PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(FILE_DIR + "createPDFWithPassWord.pdf"));// userPassword打开密码："123"// ownerPassword编辑密码: "123456"writer.setEncryption("123".getBytes(), "123456".getBytes(), PdfWriter.ALLOW_SCREENREADERS, PdfWriter.STANDARD_ENCRYPTION_128);document.open();document.add(new Paragraph(const_NEZHA, static_FONT_CHINESE));document.close();}/*** 为PDF添加页*/public static void createPDFWithNewPages() throws FileNotFoundException, DocumentException {document = new Document();PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(FILE_DIR + "createPDFAddNewPages.pdf"));document.open();document.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));writer.setPageEmpty(true);document.newPage();document.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));document.close();}/*** 为PDF文件添加水印，背景图*/public static void createPDFWithWaterMark() throws IOException, DocumentException {FileOutputStream out = new FileOutputStream(FILE_DIR + "createPDFWithWaterMark.pdf");document = new Document();PdfWriter.getInstance(document, out);document.open();document.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));document.close();// 图片水印PdfReader reader = new PdfReader(FILE_DIR + "createPDFWithWaterMark.pdf");PdfStamper stamp = new PdfStamper(reader, new FileOutputStream(FILE_DIR + "createPDFWithWaterMark2.pdf"));Image img = Image.getInstance(const_JPG_JAVA);img.setAbsolutePosition(200, 200);PdfContentByte under = stamp.getUnderContent(1);under.addImage(img);// 文字水印PdfContentByte over = stamp.getOverContent(2);// 加载字库来完成对字体的创建BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED);over.beginText();// 设置颜色 默认为蓝色over.setColorFill(BaseColor.RED);// 设置字体字号over.setFontAndSize(bf, 50);// 设置起始位置over.setTextMatrix(30, 30);// 开始写入水印 左-下-倾斜度over.showTextAligned(Element.ALIGN_LEFT, "nezha", 245, 400, 30);over.endText();// 背景图Image img2 = Image.getInstance(const_JPG_NGINX);img2.setAbsolutePosition(0, 0);PdfContentByte under2 = stamp.getUnderContent(3);under2.addImage(img2);stamp.close();reader.close();}/*** 插入Chunk, Phrase, Paragraph, List* Chunk : 块，PDF文档中描述的最小原子元素* Phrase : 短语，Chunk的集合* Paragraph : 段落，一个有序的Phrase集合*/public static void createPDFWithContent() throws DocumentException, FileNotFoundException {FileOutputStream out = new FileOutputStream(FILE_DIR + "createPDFWithContent.pdf");document = new Document();PdfWriter.getInstance(document, out);document.open();// 添加块document.add(new Chunk(const_NEZHA, static_FONT_CHINESE));Font font = new Font(Font.FontFamily.HELVETICA, 8, Font.BOLD, BaseColor.WHITE);Chunk id = new Chunk("springboot", font);id.setBackground(BaseColor.BLACK, 1f, 0.5f, 1f, 1.5f);id.setTextRise(7);document.add(id);Font font2 = new Font(Font.FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE);Chunk id2 = new Chunk("springcloud", font2);id2.setBackground(BaseColor.BLACK, 1f, 0.5f, 1f, 1.5f);id2.setTextRise(3);id2.setUnderline(0.2f, -2f);document.add(id2);document.add(Chunk.NEWLINE);// 添加一页，添加短语document.newPage();document.add(new Phrase("Phrase page"));// 添加短语Phrase director = new Phrase();Chunk name = new Chunk(const_BIBIDONG, static_FONT_CHINESE);// 添加下划线（thickness:下划线的粗细，yPosition:下划线离字的距离）name.setUnderline(0.5f, -1f);director.add(name);director.add(new Chunk(","));director.add(new Chunk(" "));director.add(new Chunk(const_YUNYUN, static_FONT_CHINESE));director.setLeading(24);document.add(director);// 添加一页document.newPage();Phrase director2 = new Phrase();Chunk name2 = new Chunk(const_BIBIDONG, static_FONT_CHINESE);name2.setUnderline(0.2f, -2f);director2.add(name2);director2.add(new Chunk(","));director2.add(new Chunk(" "));director2.add(new Chunk(const_YUNYUN, static_FONT_CHINESE));director2.setLeading(24);document.add(director2);// 添加段落document.newPage();document.add(new Paragraph("Paragraph page"));Paragraph info = new Paragraph();info.add(new Chunk(const_NEZHA));info.add(new Chunk(const_BIBIDONG));info.add(Chunk.NEWLINE);info.add(new Phrase(const_NEZHA));info.add(new Phrase(const_NEZHA));document.add(info);// 通过循环添加段落信息document.newPage();List list = new List(List.ORDERED);for (int i = 0; i < 5; i++) {ListItem item = new ListItem(String.format("%s: %d "+const_NEZHA, const_YUNYUN + (i + 1), (i + 1) * 100), new Font(Font.FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE));List girllist = new List(List.ORDERED, List.ALPHABETICAL);girllist.setLowercase(List.LOWERCASE);for (int j = 0; j < 3; j++) {ListItem girlitem = new ListItem("girls" + (j + 1));List rolelist = new List(List.UNORDERED);for (int k = 0; k < 2; k++) {rolelist.add(String.format("%s, %s", const_NEZHA + (k + 1), const_BIBIDONG + (k + 1)));}girlitem.add(rolelist);girllist.add(girlitem);}item.add(girllist);list.add(item);}document.add(list);document.close();}/*** 插入锚Anchor, Image, 章节Chapter, 子列表Section*/public static void createPDFWithExtraContent() throws DocumentException, MalformedURLException, IOException {FileOutputStream out = new FileOutputStream(FILE_DIR + "createPDFWithExtraContent.pdf");document = new Document();PdfWriter.getInstance(document, out);document.open();String content = "you can get anything from : ";Paragraph paragraph = new Paragraph(content);// 创建一个链接到外部网站的新锚点// 并将此锚点添加到段落中。Anchor anchor = new Anchor(const_BAIDU, static_FONT_LINK);anchor.setReference(const_BAIDU_URL);paragraph.add(anchor);document.add(paragraph);// Image对象document.newPage();Image img = Image.getInstance(const_JPG_NGINX);img.setAlignment(Image.LEFT | Image.TEXTWRAP);img.setBorder(Image.BOX);img.setBorderWidth(10);img.setBorderColor(BaseColor.WHITE);img.scaleToFit(800, 50);// 大小img.setRotationDegrees(-50);// 旋转document.add(img);// 章节Chapter -- 目录document.newPage();Paragraph title = new Paragraph(const_TITLE_FIRST,static_FONT_CHINESE);// 标题和序号Chapter chapter = new Chapter(title, 1);// 子列表Sectiontitle = new Paragraph(const_TITLE_SECOND,static_FONT_CHINESE);Section section = chapter.addSection(title);section.setBookmarkTitle(const_NEZHA);section.setIndentation(10);section.setBookmarkOpen(false);section.setNumberStyle(Section.NUMBERSTYLE_DOTTED_WITHOUT_FINAL_DOT);Section subsection1 = section.addSection(new Paragraph(const_CONTENT,static_FONT_CHINESE));subsection1.setIndentationLeft(10);subsection1.setNumberDepth(1);document.add(chapter);document.close();}/*** 画图*/public static void draw() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "draw.pdf");document = new Document();PdfWriter.getInstance(document, out);document.open();// 左右箭头document.add(new VerticalPositionMark() {public void draw(PdfContentByte canvas, float llx, float lly, float urx, float ury, float y) {canvas.beginText();BaseFont bf = null;try {bf = BaseFont.createFont(BaseFont.ZAPFDINGBATS, "", BaseFont.EMBEDDED);} catch (Exception e) {e.printStackTrace();}canvas.setFontAndSize(bf, 12);// LEFTcanvas.showTextAligned(Element.ALIGN_CENTER, String.valueOf((char) 220), llx - 10, y, 0);// RIGHTcanvas.showTextAligned(Element.ALIGN_CENTER, String.valueOf((char) 220), urx + 10, y + 8, 180);canvas.endText();}});// 直线Paragraph p1 = new Paragraph(const_NEZHA ,static_FONT_CHINESE);p1.add(new Chunk(new LineSeparator()));p1.add(const_BIBIDONG);document.add(p1);// 点线Paragraph p2 = new Paragraph(const_NEZHA ,static_FONT_CHINESE);p2.add(new Chunk(new DottedLineSeparator()));p2.add(const_BIBIDONG);document.add(p2);// 下滑线LineSeparator UNDERLINE = new LineSeparator(1, 100, null, Element.ALIGN_CENTER, -2);Paragraph p3 = new Paragraph(const_NEZHA_PROGRAM ,static_FONT_CHINESE);p3.add(UNDERLINE);document.add(p3);document.close();}/*** 设置段落*/public static void createPDFWithAlignment() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "createPDFWithAlignment.pdf");document = new Document();PdfWriter.getInstance(document, out);document.open();Paragraph p = new Paragraph("Never frown, even when you are sad, because you never know who is falling in love with your smile;" +"You will see exactly what life is worth, when all the rest has gone;" +"It is very simple to be happy, but it is very difficult to be simple.");// 默认p.setAlignment(Element.ALIGN_JUSTIFIED);document.add(p);// 慢慢的向右移动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);document.close();}/*** 删除页*/public static void createPDFToDeletePage() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "createPDFToDeletePage.pdf");document = new Document();PdfWriter writer = PdfWriter.getInstance(document, out);document.open();document.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));document.close();PdfReader reader = new PdfReader(FILE_DIR + "createPDFToDeletePage.pdf");reader.selectPages("1,3");PdfStamper stamp = new PdfStamper(reader, new FileOutputStream(FILE_DIR + "createPDFToDeletePage2.pdf"));stamp.close();reader.close();}/*** 插入 page*/public static void insertPage() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "insertPage.pdf");document = new Document();PdfWriter.getInstance(document, out);document.open();document.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));document.close();PdfReader reader = new PdfReader(FILE_DIR + "insertPage.pdf");PdfStamper stamp = new PdfStamper(reader, new FileOutputStream(FILE_DIR + "insertPage2.pdf"));stamp.insertPage(2, reader.getPageSize(1));ColumnText ct = new ColumnText(null);ct.addElement(new Paragraph(24, new Chunk("INSERT PAGE")));ct.setCanvas(stamp.getOverContent(2));ct.setSimpleColumn(36, 36, 559, 770);stamp.close();reader.close();}/*** 分割 page*/public static void splitPDF() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "splitPDF.pdf");document = new Document();PdfWriter.getInstance(document, out);document.open();document.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_FOUR, static_FONT_CHINESE));document.close();PdfReader reader = new PdfReader(FILE_DIR + "splitPDF.pdf");Document dd = new Document();PdfWriter writer = PdfWriter.getInstance(dd, new FileOutputStream(FILE_DIR + "splitPDF1.pdf"));dd.open();PdfContentByte cb = writer.getDirectContent();dd.newPage();cb.addTemplate(writer.getImportedPage(reader, 1), 0, 0);dd.newPage();cb.addTemplate(writer.getImportedPage(reader, 2), 0, 0);dd.close();writer.close();Document dd2 = new Document();PdfWriter writer2 = PdfWriter.getInstance(dd2, new FileOutputStream(FILE_DIR + "splitPDF2.pdf"));dd2.open();PdfContentByte cb2 = writer2.getDirectContent();dd2.newPage();cb2.addTemplate(writer2.getImportedPage(reader, 3), 0, 0);dd2.newPage();cb2.addTemplate(writer2.getImportedPage(reader, 4), 0, 0);dd2.close();writer2.close();}/*** 合并 PDF 文件*/public static void mergePDF() throws Exception {PdfReader reader1 = new PdfReader(FILE_DIR + "splitPDF1.pdf");PdfReader reader2 = new PdfReader(FILE_DIR + "splitPDF2.pdf");FileOutputStream out = new FileOutputStream(FILE_DIR + "mergePDF.pdf");Document document = new Document();PdfWriter writer = PdfWriter.getInstance(document, out);document.open();PdfContentByte cb = writer.getDirectContent();java.util.List<PdfReader> readers = new ArrayList<PdfReader>();readers.add(reader1);readers.add(reader2);int pageOfCurrentReaderPDF = 0;Iterator<PdfReader> iteratorPDFReader = readers.iterator();while (iteratorPDFReader.hasNext()) {PdfReader pdfReader = iteratorPDFReader.next();// 在目标中为每个源页面创建一个新页面while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {document.newPage();pageOfCurrentReaderPDF++;PdfImportedPage page = writer.getImportedPage(pdfReader, pageOfCurrentReaderPDF);cb.addTemplate(page, 0, 0);}pageOfCurrentReaderPDF = 0;}out.flush();document.close();out.close();}/*** 排序page*/public static void sortpage() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "sortpage.pdf");document = new Document();PdfWriter writer = PdfWriter.getInstance(document, out);writer.setLinearPageMode();document.open();document.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_FOUR, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_FIVE, static_FONT_CHINESE));int[] order = { 4, 3, 2, 1 };writer.reorderPages(order);document.close();}/*** 页眉页脚*/public static void setHeaderFooter() throws Exception {document = new Document();PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(FILE_DIR + "setHeaderFooter.pdf"));writer.setPageEvent(new PdfPageEventHelper() {public void onEndPage(PdfWriter writer, Document document) {PdfContentByte cb = writer.getDirectContent();cb.saveState();cb.beginText();BaseFont bf = null;try {bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED);} catch (Exception e) {e.printStackTrace();}cb.setFontAndSize(bf, 10);// Headerfloat x = document.top(-20);// 左cb.showTextAligned(PdfContentByte.ALIGN_LEFT, "H-Left", document.left(), x, 0);// 中cb.showTextAligned(PdfContentByte.ALIGN_CENTER, writer.getPageNumber() + " page", (document.right() + document.left()) / 2, x, 0);// 右cb.showTextAligned(PdfContentByte.ALIGN_RIGHT, "H-Right", document.right(), x, 0);// Footerfloat y = document.bottom(-20);// 左cb.showTextAligned(PdfContentByte.ALIGN_LEFT, "F-Left", document.left(), y, 0);// 中cb.showTextAligned(PdfContentByte.ALIGN_CENTER, writer.getPageNumber() + " page", (document.right() + document.left()) / 2, y, 0);// 右cb.showTextAligned(PdfContentByte.ALIGN_RIGHT, "F-Right", document.right(), y, 0);cb.endText();cb.restoreState();}});document.open();document.add(new Paragraph("1 page"));document.newPage();document.add(new Paragraph("2 page"));document.newPage();document.add(new Paragraph("3 page"));document.newPage();document.add(new Paragraph("4 page"));document.close();}public static void addColumnText() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "addColumnText.pdf");Document document = new Document();PdfWriter writer = PdfWriter.getInstance(document, out);document.open();PdfContentByte canvas = writer.getDirectContent();Phrase phrase1 = new Phrase(const_BIBIDONG + " is a beauty!left", static_FONT_CHINESE);Phrase phrase2 = new Phrase(const_BIBIDONG + " is a beauty!right", static_FONT_CHINESE);Phrase phrase3 = new Phrase(const_BIBIDONG + " is a beauty!center", static_FONT_CHINESE);ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase1, 200, 700, 0);ColumnText.showTextAligned(canvas, Element.ALIGN_RIGHT, phrase2, 200, 600, 0);ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, phrase3, 200, 500, 0);document.close();}/*** 文档视图*/public static void setView() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "setView.pdf");document = new Document();PdfWriter writer = PdfWriter.getInstance(document, out);writer.setPdfVersion(PdfWriter.VERSION_1_5);writer.setViewerPreferences(PdfWriter.PageModeFullScreen);// 全屏writer.setPageEvent(new PdfPageEventHelper() {public void onStartPage(PdfWriter writer, Document document) {writer.setTransition(new PdfTransition(PdfTransition.DISSOLVE, 3));writer.setDuration(5);// 间隔时间}});document.open();document.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_FOUR, static_FONT_CHINESE));document.newPage();document.add(new Paragraph(const_PAGE_FIVE, static_FONT_CHINESE));document.close();}/*** 压缩PDF到Zip*/public static void pdfToZip() throws Exception {ZipOutputStream zip = new ZipOutputStream(new FileOutputStream(FILE_DIR + "pdfToZip.zip"));for (int i = 1; i <= 3; i++) {ZipEntry entry = new ZipEntry(const_NEZHA + i + ".pdf");zip.putNextEntry(entry);document = new Document();PdfWriter writer = PdfWriter.getInstance(document, zip);writer.setCloseStream(false);document.open();document.add(new Paragraph(const_NEZHA + i, static_FONT_CHINESE));document.close();zip.closeEntry();}zip.close();}/*** 添加注释*/public static void addAnnotation() throws Exception {FileOutputStream out = new FileOutputStream(FILE_DIR + "addAnnotation.pdf");Document doc = new Document();PdfWriter writer = PdfWriter.getInstance(doc, out);writer.setLinearPageMode();doc.open();doc.add(new Paragraph(const_PAGE_FIRST, static_FONT_CHINESE));doc.add(new Annotation("title", "this is a annotation!"));doc.newPage();doc.add(new Paragraph(const_PAGE_SECOND, static_FONT_CHINESE));Chunk chunk = new Chunk(const_NEZHA);chunk.setAnnotation(PdfAnnotation.createText(writer, null, "Title", "this is a another annotation!", false, "Comment"));doc.add(chunk);// 添加附件//doc.newPage();//doc.add(new Paragraph(const_PAGE_THIRD, static_FONT_CHINESE));//Chunk chunk2 = new Chunk(const_BIBIDONG, static_FONT_CHINESE);//PdfAnnotation annotation = PdfAnnotation.createFileAttachment(writer, null, "Title", null, const_JPG_JAVA, const_JPG_NGINX);//annotation.put(PdfName.NAME, new PdfString("Paperclip"));//chunk2.setAnnotation(annotation);//doc.add(chunk2);doc.close();}
}

六、更多的Java代码实例

【Java 代码实例 1】java反射三种方法
【Java 代码实例 4】javacompiler编译多java文件
【Java 代码实例 6】FileUtils、StringUtil、CollectionUtils、ArrayUtils（附代码示例）
【Java 代码实例 7】jsoup解析html
【Java 代码实例 8】qrcode生成二维码
【Java 代码实例 9】Java通过Process执行C# exe程序

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