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常州做网站公司,电子商务模拟实训报告企业网站建设,网站开发架构,品质好可以说成品质什么5.1 使用表和单元格事件装饰表 实现PdfPTableEvent 接口 实现PdfPCellEvent 接口 合并表格和单元格事件 5.2 基本构建块的事件 通用块#xff08;Chunk#xff09;功能 段落#xff08;Paragraph#xff09;事件 章节#xff08;Chapter#xff09;和 区域#xff08;…5.1 使用表和单元格事件装饰表 实现PdfPTableEvent 接口 实现PdfPCellEvent 接口 合并表格和单元格事件 5.2 基本构建块的事件 通用块Chunk功能 段落Paragraph事件 章节Chapter和 区域Section事件 页面顺序和空白页面 5.3 页面边界概述 媒体盒 作物箱 其他页面边界 5.4 添加页码事件到 PdfWriter PdfPageEvent 接口 onOpenDocument()当文档打开后触发初始化变量整个文档可使用 onStartPage()当开始一个新页面触发初始化页面级变量不要在这个方法内添加内容 onEndPage()开始一个新页面并在文档关闭前触发这里添加header、footer、watermark等 onCloseDocument()文档关闭时触发这里释放资源 添加页头与页尾 import java.io.FileOutputStream; import java.io.IOException; import java.sql.SQLException; import com.itextpdf.text.Chapter; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Element; import com.itextpdf.text.Font; import com.itextpdf.text.PageSize; import com.itextpdf.text.Paragraph; import com.itextpdf.text.Phrase; import com.itextpdf.text.Rectangle; import com.itextpdf.text.Font.FontFamily; import com.itextpdf.text.pdf.ColumnText; import com.itextpdf.text.pdf.PdfPageEventHelper; import com.itextpdf.text.pdf.PdfWriter;public class MovieHistory2 {/** The resulting PDF file. */public static final String RESULT results/part1/chapter05/movie_history2.pdf;/** Inner class to add a header and a footer. */class HeaderFooter extends PdfPageEventHelper {/** Alternating phrase for the header. */Phrase[] header new Phrase[2];/** Current page number (will be reset for every chapter). /int pagenumber;/** Initialize one of the headers.* see com.itextpdf.text.pdf.PdfPageEventHelper#onOpenDocument(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onOpenDocument(PdfWriter writer, Document document) {header[0] new Phrase(Movie history);}/** Initialize one of the headers, based on the chapter title;* reset the page number.* see com.itextpdf.text.pdf.PdfPageEventHelper#onChapter(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document, float,* com.itextpdf.text.Paragraph)/public void onChapter(PdfWriter writer, Document document,float paragraphPosition, Paragraph title) {header[1] new Phrase(title.getContent());pagenumber 1;}/** Increase the page number.* see com.itextpdf.text.pdf.PdfPageEventHelper#onStartPage(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onStartPage(PdfWriter writer, Document document) {pagenumber;}/** Adds the header and the footer.* see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)*/public void onEndPage(PdfWriter writer, Document document) {Rectangle rect writer.getBoxSize(art);switch(writer.getPageNumber() % 2) {case 0:ColumnText.showTextAligned(writer.getDirectContent(),Element.ALIGN_RIGHT, header[0],rect.getRight(), rect.getTop(), 0);break;case 1:ColumnText.showTextAligned(writer.getDirectContent(),Element.ALIGN_LEFT, header[1],rect.getLeft(), rect.getTop(), 0);break;}ColumnText.showTextAligned(writer.getDirectContent(),Element.ALIGN_CENTER, new Phrase(String.format(page %d, pagenumber)),(rect.getLeft() rect.getRight()) / 2, rect.getBottom() - 18, 0);}}/** The different epochs. */public static final String[] EPOCH { Forties, Fifties, Sixties, Seventies, Eighties,Nineties, Twenty-first Century };/** The fonts for the title. /public static final Font[] FONT new Font[4];static {FONT[0] new Font(FontFamily.HELVETICA, 24);FONT[1] new Font(FontFamily.HELVETICA, 18);FONT[2] new Font(FontFamily.HELVETICA, 14);FONT[3] new Font(FontFamily.HELVETICA, 12, Font.BOLD);}/** Creates a PDF document.* param filename the path to the new PDF document* throws DocumentException * throws IOException* throws SQLException/public void createPdf(String filename)throws IOException, DocumentException, SQLException {// step 1Document document new Document(PageSize.A4, 36, 36, 54, 54);// step 2PdfWriter writer PdfWriter.getInstance(document, new FileOutputStream(RESULT));HeaderFooter event new HeaderFooter();writer.setBoxSize(art, new Rectangle(36, 54, 559, 788));writer.setPageEvent(event);// step 3document.open();// step 4Chapter chapter null;// 初始化数据…document.add(chapter);// step 5document.close();}/** Main method.** param args no arguments needed* throws DocumentException * throws IOException * throws SQLException*/public static void main(String[] args)throws IOException, DocumentException, SQLException {new MovieHistory2().createPdf(RESULT);} } 解决 page X of Y 问题 利用XObject特性iText 真正将PdfTemplate 写入 OutputStream 是在调用releaseTemplate() 时。 import java.io.FileOutputStream; import java.io.IOException; import java.sql.SQLException; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Element; import com.itextpdf.text.ExceptionConverter; import com.itextpdf.text.Image; import com.itextpdf.text.PageSize; import com.itextpdf.text.Phrase; import com.itextpdf.text.Rectangle; import com.itextpdf.text.pdf.ColumnText; import com.itextpdf.text.pdf.PdfPCell; import com.itextpdf.text.pdf.PdfPTable; import com.itextpdf.text.pdf.PdfPageEventHelper; import com.itextpdf.text.pdf.PdfTemplate; import com.itextpdf.text.pdf.PdfWriter;public class MovieCountries1 {/** The resulting PDF file. /public static final String RESULT D:/data/iText/inAction/chapter05/movie_countries1.pdf;/** Inner class to add a table as header.*/class TableHeader extends PdfPageEventHelper {/** The header text. */String header;/** The template with the total number of pages. /PdfTemplate total;/** Allows us to change the content of the header.* param header The new header String/public void setHeader(String header) {this.header header;}/** Creates the PdfTemplate that will hold the total number of pages.* see com.itextpdf.text.pdf.PdfPageEventHelper#onOpenDocument(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onOpenDocument(PdfWriter writer, Document document) {total writer.getDirectContent().createTemplate(30, 16);}/** Adds a header to every page* see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onEndPage(PdfWriter writer, Document document) {PdfPTable table new PdfPTable(3);try {table.setWidths(new int[]{24, 24, 2});table.setTotalWidth(527);table.setLockedWidth(true);table.getDefaultCell().setFixedHeight(20);table.getDefaultCell().setBorder(Rectangle.BOTTOM);table.addCell(header);table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);table.addCell(String.format(Page %d of, writer.getPageNumber()));PdfPCell cell new PdfPCell(Image.getInstance(total));cell.setBorder(Rectangle.BOTTOM);table.addCell(cell);table.writeSelectedRows(0, -1, 34, 803, writer.getDirectContent());}catch(DocumentException de) {throw new ExceptionConverter(de);}}/** Fills out the total number of pages before the document is closed.* see com.itextpdf.text.pdf.PdfPageEventHelper#onCloseDocument(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onCloseDocument(PdfWriter writer, Document document) {ColumnText.showTextAligned(total, Element.ALIGN_LEFT,new Phrase(String.valueOf(writer.getPageNumber() - 1)),2, 2, 0);}}/** Creates a PDF document.* param filename the path to the new PDF document* throws DocumentException * throws IOException* throws SQLException/public void createPdf(String filename)throws IOException, DocumentException, SQLException {// step 1Document document new Document(PageSize.A4, 36, 36, 54, 36);// step 2PdfWriter writer PdfWriter.getInstance(document, new FileOutputStream(RESULT));TableHeader event new TableHeader();writer.setPageEvent(event);// step 3document.open();// step 4// 新建页面数据…document.add(new Phrase(Hello Page 1.));document.newPage();document.add(new Phrase(Hello Page 2.));document.newPage();document.add(new Phrase(Hello Page 3.));document.newPage();document.add(new Phrase(Hello Page 4.));// step 4document.close();}/** Main method.** param args no arguments needed* throws DocumentException * throws IOException * throws SQLException/public static void main(String[] args)throws IOException, DocumentException, SQLException {new MovieCountries1().createPdf(RESULT);} }在页尾添加页码 import java.io.FileOutputStream; import java.io.IOException; import java.sql.SQLException; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.ExceptionConverter; import com.itextpdf.text.PageSize; import com.itextpdf.text.Phrase; import com.itextpdf.text.pdf.BaseFont; import com.itextpdf.text.pdf.PdfContentByte; import com.itextpdf.text.pdf.PdfPageEventHelper; import com.itextpdf.text.pdf.PdfTemplate; import com.itextpdf.text.pdf.PdfWriter;/** TODO 在此写上类的相关说明.br* author gongqiang br* version 1.0.0 2023年9月18日br* see * since JDK 1.5.0*/ public class MovieCountries {/** The resulting PDF file. /public static final String RESULT D:/data/iText/inAction/chapter05/movie_countries.pdf;/** Inner class to add a table as header.*/class TableHeader extends PdfPageEventHelper {/** The header text. */String header;/** The template with the total number of pages. /PdfTemplate total;BaseFont baseFont;int fontSize 14;/** Allows us to change the content of the header.* param header The new header String/public void setHeader(String header) {this.header header;}/** Creates the PdfTemplate that will hold the total number of pages.* see com.itextpdf.text.pdf.PdfPageEventHelper#onOpenDocument(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onOpenDocument(PdfWriter writer, Document document) {total writer.getDirectContent().createTemplate(30, 16);try {baseFont BaseFont.createFont(D:/data/iText/fonts/simfang.ttf, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);} catch (Exception e) {throw new ExceptionConverter(e);}}/** Adds a header to every page* see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onEndPage(PdfWriter writer, Document document) {// 新建获得用户页面文本和图片内容位置的对象PdfContentByte pdfContentByte writer.getDirectContent();// 保存图形状态pdfContentByte.saveState();String text 页 writer.getPageNumber() /;//String text 页 99/;// 获取点字符串的宽度float textSize baseFont.getWidthPoint(text, fontSize);pdfContentByte.beginText();// 设置随后的文本内容写作的字体和字号pdfContentByte.setFontAndSize(baseFont, fontSize);// 定位X/ // float x (document.right() document.left()) / 2;float x document.right() - 50;float y 20f;pdfContentByte.setTextMatrix(x, y);pdfContentByte.showText(text);pdfContentByte.endText();// 将模板加入到内容content中- // 定位YpdfContentByte.addTemplate(total, x textSize, y);pdfContentByte.restoreState();}/** Fills out the total number of pages before the document is closed.* see com.itextpdf.text.pdf.PdfPageEventHelper#onCloseDocument(* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)/public void onCloseDocument(PdfWriter writer, Document document) {total.beginText();total.setFontAndSize(baseFont, fontSize);total.setTextMatrix(0, 0);// 设置总页数的值到模板上并应用到每个界面total.showText(String.valueOf(writer.getPageNumber()));//total.showText(String.valueOf(99));total.endText();}}/** Creates a PDF document.* param filename the path to the new PDF document* throws DocumentException * throws IOException* throws SQLException/public void createPdf(String filename)throws IOException, DocumentException, SQLException {// step 1Document document new Document(PageSize.A4, 36, 36, 54, 36);// step 2PdfWriter writer PdfWriter.getInstance(document, new FileOutputStream(RESULT));TableHeader event new TableHeader();writer.setPageEvent(event);// step 3document.open();// step 4// 新建页面数据…document.add(new Phrase(Hello Page 1.));document.newPage();document.add(new Phrase(Hello Page 2.));document.newPage();document.add(new Phrase(Hello Page 3.));document.newPage();document.add(new Phrase(Hello Page 4.));// step 4document.close();}/** Main method.** param args no arguments needed* throws DocumentException * throws IOException * throws SQLException*/public static void main(String[] args)throws IOException, DocumentException, SQLException {new MovieCountries().createPdf(RESULT);} } 添加水印 如果水印是图片可以通过PdfContentByte.addImage()、或将图片包装成ColumnText对象或者添加到表格的cell里。 注意Image对象需要在onOpenDocument()方法内初始化避免重复添加图片的字节流。 import java.io.FileOutputStream; import java.io.IOException; import java.sql.SQLException; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Element; import com.itextpdf.text.Font; import com.itextpdf.text.Font.FontFamily; import com.itextpdf.text.PageSize; import com.itextpdf.text.Phrase; import com.itextpdf.text.pdf.ColumnText; import com.itextpdf.text.pdf.GrayColor; import com.itextpdf.text.pdf.PdfPageEventHelper; import com.itextpdf.text.pdf.PdfWriter;public class MovieCountries2 extends MovieCountries1 {/** The resulting PDF file. /public static final String RESULT D:/data/iText/inAction/chapter05/movie_countries2.pdf;/** Inner class to add a watermark to every page./class Watermark extends PdfPageEventHelper {Font FONT new Font(FontFamily.HELVETICA, 52, Font.BOLD, new GrayColor(0.75f));public void onEndPage(PdfWriter writer, Document document) {ColumnText.showTextAligned(writer.getDirectContentUnder(),Element.ALIGN_CENTER, new Phrase(FOOBAR FILM FESTIVAL, FONT),297.5f, 421, writer.getPageNumber() % 2 1 ? 45 : -45);}}/** Creates a PDF document.* param filename the path to the new PDF document* throws DocumentException * throws IOException* throws SQLException/public void createPdf(String filename)throws IOException, DocumentException, SQLException {// step 1Document document new Document(PageSize.A4, 36, 36, 54, 36);// step 2PdfWriter writer PdfWriter.getInstance(document, new FileOutputStream(RESULT));TableHeader event new TableHeader();writer.setPageEvent(event);writer.setPageEvent(new Watermark());// step 3document.open();// step 4// 新建页面数据…document.add(new Phrase(Hello Page 1.));document.newPage();document.add(new Phrase(Hello Page 2.));document.newPage();document.add(new Phrase(Hello Page 3.));document.newPage();document.add(new Phrase(Hello Page 4.));// step 5document.close();}/** Main method.** param args no arguments needed* throws DocumentException * throws IOException * throws SQLException*/public static void main(String[] args)throws IOException, DocumentException, SQLException {new MovieCountries2().createPdf(RESULT);} } 创建幻灯片