iText是一種生成PDF報表的Java元件，通過iText不僅可以生成pdf檔案，而且可以將xml、html檔案轉換為pdf檔案。

生成PDF檔案

//Step 1—Create a Document.  
Document document = new Document();  
//Step 2—Get a PdfWriter instance.  
PdfWriter.getInstance(document, new FileOutputStream(FILE_DIR + "createSamplePDF.pdf"));  
//Step 3—Open the Document.  
document.open();  
//Step 4—Add content.  
document.add(new Paragraph("Hello World"));  
//Step 5—Close the Document.  
document.close();  
 

頁面大小、背景顏色、頁邊留白（Title,Author,Subject,Keywords ）

//頁面大小  
Rectangle rect = new Rectangle(PageSize.B5.rotate());  
//頁面背景色  
rect.setBackgroundColor(BaseColor.ORANGE);  
  
Document doc = new Document(rect);  
  
PdfWriter writer = PdfWriter.getInstance(doc, out);  
  
//PDF版本(預設1.4)  
writer.setPdfVersion(PdfWriter.PDF_VERSION_1_2);  
  
//文件屬性  
doc.addTitle("
 
[email protected]");  
doc.addAuthor("[email protected]");  
doc.addSubject("[email protected] sample");  
doc.addKeywords("[email protected]");  
doc.addCreator("[email protected]");  
  
//頁邊空白  
doc.setMargins(10, 20, 30, 40);  
  
doc.open();  
doc.add(new Paragraph("Hello World"));