//创建Document

            　　Document document = null;

            　　//为该Document创建一个Writer实例

            　　PdfWriter writer = null;

            　　//段（内容）

            　　Paragraph p = null;
　　　　　　　　　//字体

                BaseFont baseFont = BaseFont.CreateFont(Server.MapPath("Configuration/STZHONGS.TTF"), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);

                Font font = null;

                //内存流

                document = new Document(PageSize.A4.Rotate(), , , , );

                //为该Document创建一个Writer实例

                writer = PdfWriter.GetInstance(document, new FileStream(filepath + strCerId + ".pdf", FileMode.Create));

                //writer.SetEncryption(PdfWriter.STRENGTH40BITS, null, null, PdfWriter.ALLOW_PRINTING);

                //打开

                document.Open();

                //指定位置添加图片

                PdfContentByte pcb1 = writer.DirectContent;

                iTextSharp.text.Image image1 = iTextSharp.text.Image.GetInstance(Server.MapPath("Configuration/1.png"));

                image1.SetAbsolutePosition(, );

                image1.ScaleAbsolute(, );

                pcb1.AddImage(image1);

                font = new Font(baseFont, , Font.BOLD);

                p = new Paragraph("\n\n“标题", font);

                p.Alignment = Element.ALIGN_CENTER;

                document.Add(p);

                font = new Font(baseFont, , Font.BOLD);

                p = new Paragraph("标题", font);

                p.Alignment = Element.ALIGN_CENTER;

                document.Add(p);

                font = new Font(baseFont, , Font.NORMAL);

                p = new Paragraph("\n　　正文。", font);

                p.Alignment = Element.ALIGN_LEFT;

                document.Add(p);

                font = new Font(baseFont, , Font.NORMAL);

                p = new Paragraph("\n署名", font);

                p.Alignment = Element.ALIGN_RIGHT;

                document.Add(p);

                font = new Font(baseFont, , Font.NORMAL);

                p = new Paragraph("2016年6月22日", font);

                p.Alignment = Element.ALIGN_RIGHT;

                document.Add(p);

　　　　　　　　  //关闭目标文件

                document.Close();

                writer.Close();

                document = null;

                //关闭写入流

                writer = null;