iText
编程爱好者联盟 2016-11-06
iText是著名的开放项目，是用于生成PDF文档的一个java类库。通过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。
官方网站：http://itextpdf.com/
示例版本：itextpdf-5.2.1.jar
生成简单的PDF文件
Rectangle rect = new Rectangle(PageSize.B5.rotate()); //页面大小
rect.setBackgroundColor(BaseColor.ORANGE); //页面背景色
Document doc = new Document(rect);
PdfWriter writer = PdfWriter.getInstance(doc, out);
writer.setPdfVersion(PdfWriter.PDF_VERSION_1_2); //PDF版本(默认1.4)
/* 设置密码 */
writer.setEncryption("Hello".getBytes(), "World".getBytes(),
PdfWriter.ALLOW_SCREENREADERS,
PdfWriter.STANDARD_ENCRYPTION_128);
/* PDF属性 */
doc.addTitle("Title@sample");
doc.addAuthor("Author@rensanning");
doc.addSubject("Subject@iText sample");
doc.addKeywords("Keywords@iText");
doc.addCreator("Creator@iText");
doc.setMargins(10, 20, 30, 40);
doc.open();
doc.add(new Paragraph("Hello World")); //在此处追加内容
document.close(); 
添加多页
document.add(new Paragraph("First page"));
document.add(new Paragraph(Document.getVersion()));
document.newPage();
writer.setPageEmpty(false);
document.newPage();
document.add(new Paragraph("New page")); 添加水印(背景图)
/* 图片水印 */
PdfReader reader = new PdfReader(FILE_DIR + "setWatermark.pdf");
PdfStamper stamp = new PdfStamper(reader, new FileOutputStream(FILE_DIR + "setWatermark2.pdf"));
Image img = Image.getInstance("resource/watermark.jpg");
img.setAbsolutePosition(200, 400);
PdfContentByte under = stamp.getUnderContent(1);
under.addImage(img);
/* 文字水印 */
PdfContentByte over = stamp.getOverContent(2);
over.beginText();
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI,BaseFont.EMBEDDED);
over.setFontAndSize(bf, 18);
over.setTextMatrix(30, 30);
over.showTextAligned(Element.ALIGN_LEFT, "DUPLICATE", 230, 430, 45);
over.endText();
/* 背景图 */
Image img2 = Image.getInstance("resource/test.jpg");
img2.setAbsolutePosition(0, 0);
PdfContentByte under2 = stamp.getUnderContent(3);
under2.addImage(img2);
stamp.close();
reader.close(); 添加内容
/* Chunk对象: a String, a Font, and some attributes */
document.add(new Chunk("China"));
document.add(new Chunk(" "));
Font font = new Font(Font.FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE);
Chunk id = new Chunk("chinese", 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("Japan"));
document.add(new Chunk(" "));
Font font2 = new Font(Font.FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE);
Chunk id2 = new Chunk("japanese", 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("Phrase page"));
Phrase director = new Phrase();
Chunk name = new Chunk("China");
name.setUnderline(0.2f, -2f);
director.add(name);
director.add(new Chunk(","));
director.add(new Chunk(" "));
director.add(new Chunk("chinese"));
director.setLeading(24);
document.add(director);
Phrase director2 = new Phrase();
Chunk name2 = new Chunk("Japan");
name2.setUnderline(0.2f, -2f);
director2.add(name2);
director2.add(new Chunk(","));
director2.add(new Chunk(" "));
director2.add(new Chunk("japanese"));
director2.setLeading(24);
document.add(director2);
/* Paragraph对象: a Phrase with extra properties and a newline */
document.newPage();
document.add(new Paragraph("Paragraph page"));
Paragraph info = new Paragraph();
info.add(new Chunk("China "));
info.add(new Chunk("chinese"));
info.add(Chunk.NEWLINE);
info.add(new Phrase("Japan "));
info.add(new Phrase("japanese"));
document.add(info);
/* List对象: a sequence of Paragraphs called ListItem */
document.newPage();
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 < 5; 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);
/* Anchor对象: internal and external links */
document.newPage();
Paragraph country = new Paragraph();
Anchor dest = new Anchor("china", new Font(Font.FontFamily.HELVETICA, 14, Font.BOLD, BaseColor.BLUE));
dest.setName("CN");
dest.setReference("http://www.china.com");//external
country.add(dest);
country.add(String.format(": %d sites", 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("resource/test.jpg");
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); 画图
/* 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) {}
canvas.setFontAndSize(bf, 12);
/* LEFT */
canvas.showTextAligned(Element.ALIGN_CENTER, String.valueOf((char) 220), llx - 10, y, 0);
/* RIGHT */
canvas.showTextAligned(Element.ALIGN_CENTER, String.valueOf((char) 220), urx + 10, y + 8, 180);
canvas.endText();
}
});
/* 直线 */
Paragraph p1 = new Paragraph("LEFT");
p1.add(new Chunk(new LineSeparator()));
p1.add("R");
document.add(p1);
/* 点线 */
Paragraph p2 = new Paragraph("LEFT");
p2.add(new Chunk(new DottedLineSeparator()));
p2.add("R");
document.add(p2);
/* 下滑线 */
LineSeparator UNDERLINE = new LineSeparator(1, 100, null, Element.ALIGN_CENTER, -2);
Paragraph p3 = new Paragraph("NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN");
p3.add(UNDERLINE); 设置段落
Paragraph p = new Paragraph("段落内容");
/* 对齐方式 */
p.setAlignment(Element.ALIGN_JUSTIFIED);
/* 缩进 */
p.setIndentationLeft(1 * 15f);
p.setIndentationRight((5 - 1) * 15f);
/* 间距 */
p.setSpacingAfter(15f);
p.setSpacingBefore(15f); 管理Page
/* 删除页 */
PdfReader reader = new PdfReader(FILE_DIR + "deletePage.pdf");
reader.selectPages("1,3");
PdfStamper stamp = new PdfStamper(reader, new FileOutputStream(FILE_DIR + "deletePage2.pdf"));
stamp.close();
reader.close();
/* 插入页 */
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));
stamp.close();
reader.close();
/* 页排序 */
PdfWriter writer = PdfWriter.getInstance(doc, out);
writer.setLinearPageMode();
doc.open();
doc.add(new Paragraph("1 page"));
doc.newPage();
doc.add(new Paragraph("2 page"));
doc.newPage();
doc.add(new Paragraph("3 page"));
doc.newPage();
doc.add(new Paragraph("4 page"));
doc.newPage();
doc.add(new Paragraph("5 page"));
int[] order = {4,3,2,1};
writer.reorderPages(order); 目录大纲
/* 添加一些Page */
document.newPage();
document.add(new Chunk("Chapter 1").setLocalDestination("1"));
document.newPage();
document.add(new Chunk("Chapter 2").setLocalDestination("2"));
document.add(new Paragraph(new Chunk("Sub 2.1").setLocalDestination("2.1")));
document.add(new Paragraph(new Chunk("Sub 2.2").setLocalDestination("2.2")));
document.newPage();
document.add(new Chunk("Chapter 3").setLocalDestination("3"));
/* 生成大纲 */
PdfContentByte cb = writer.getDirectContent();
PdfOutline root = cb.getRootOutline();
PdfOutline oline1 = new PdfOutline(root, PdfAction.gotoLocalPage("1", false), "Chapter 1");
PdfOutline oline2 = new PdfOutline(root, PdfAction.gotoLocalPage("2", false), "Chapter 2");
PdfOutline oline2_1 = new PdfOutline(oline2, PdfAction.gotoLocalPage("2.1", false), "Sub 2.1");
PdfOutline oline2_2 = new PdfOutline(oline2, PdfAction.gotoLocalPage("2.2", false), "Sub 2.2");
PdfOutline oline3 = new PdfOutline(root, PdfAction.gotoLocalPage("3", false), "Chapter 3"); 页眉页脚
PdfWriter writer = PdfWriter.getInstance(doc, 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) {}
cb.setFontAndSize(bf, 10);
/* Header,分左中右 */
float x = document.top(-20);
cb.showTextAligned(PdfContentByte.ALIGN_LEFT,"H-Left",document.left(), x, 0);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER,
writer.getPageNumber()+ " page",
(document.right() + document.left())/2,
x, 0);
cb.showTextAligned(PdfContentByte.ALIGN_RIGHT,"H-Right",document.right(), x, 0);
/* Footer,分左中右 */
float y = document.bottom(-20);
cb.showTextAligned(PdfContentByte.ALIGN_LEFT,"F-Left",document.left(), y, 0);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER,
writer.getPageNumber()+" page",
(document.right() + document.left())/2,
y, 0);
cb.showTextAligned(PdfContentByte.ALIGN_RIGHT,"F-Right",document.right(), y, 0);
cb.endText();
cb.restoreState();
}
}); 幻灯片放映
PdfWriter writer = PdfWriter.getInstance(doc, 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
}
}); 压缩为Zip
ZipOutputStream zip = new ZipOutputStream(new FileOutputStream(FILE_DIR + "zipPDF.zip"));
for (int i = 1; i <= 3; i++) {
ZipEntry entry = new ZipEntry("hello_" + 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();
}
zip.close(); 分割PDF
PdfReader reader = new PdfReader(FILE_DIR + "splitPDF.pdf"); /* 拆分一 */ 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(); /* 拆分二 */ 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
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();
int totalPages = 0;
totalPages += reader1.getNumberOfPages();
totalPages += reader2.getNumberOfPages();
java.util.List<PdfReader> readers = new ArrayList<PdfReader>();
readers.add(reader1);
readers.add(reader2);
int pageOfCurrentReaderPDF = 0;
Iterator<PdfReader> iteratorPDFReader = readers.iterator();
/* Loop through the PDF files and add to the output. */
while (iteratorPDFReader.hasNext()) {
PdfReader pdfReader = iteratorPDFReader.next();
/* Create a new page in the target for each source page. */
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(); 
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