Java动态生成PDF格式报表

package com.svse.servlet; import java.awt.Color; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.lowagie.text.Cell; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Font; import com.lowagie.text.Paragraph; import com.lowagie.text.Phrase; import com.lowagie.text.Table; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.PdfWriter; import com.lowagie.text.rtf.RtfWriter2; import com.svse.dao.BookInfoDao; import com.svse.vo.BookInfo; public class PdfServlet extends HttpServlet { /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String method = request.getParameter("method"); if (method.equals("show")) { this.show(request, response); } if (method.equals("pdf")) { this.createPdf(request, response); } } /** * 获得所有图书信息 * * @param request * @param response * @throws ServletException * @throws IOException */ public void show(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { BookInfoDao dao = new BookInfoDao(); List<BookInfo> list = dao.findAll(); request.setAttribute("list", list); request.getRequestDispatcher("show.jsp").forward(request, response); } /** * 动态生成pdf文件 * * @param request * @param response * @throws ServletException * @throws IOException */ public void createPdf(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ByteArrayOutputStream buffer = new ByteArrayOutputStream(); try { Document document = new Document(); PdfWriter.getInstance(document, buffer); // RtfWriter2.getInstance(document, buffer); // 定义表格对象 Table table = new Table(5); float[] widths = { 0.30f, 0.20f, 0.30f, 0.10f, 0.10f }; // 设置表格属性 table.setBorderWidth(1); table.setBorderColor(new Color(0, 0, 0)); table.setPadding(0); table.setSpacing(0); // 设置列宽 table.setWidths(widths); // 中文处理 BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED); Font FontChinese = new Font(bfChinese, 12, Font.NORMAL); Phrase ph = new Paragraph("图书信息", FontChinese); Cell cell = new Cell(ph); //跨5列 cell.setColspan(5); //设置水平居中 cell.setHorizontalAlignment(Element.ALIGN_CENTER); table.addCell(cell); Phrase p1 = new Phrase("图书名", FontChinese); Phrase p2 = new Phrase("图书ISBN ", FontChinese); Phrase p3 = new Phrase("图书作者", FontChinese); Phrase p4 = new Phrase("图书价格", FontChinese); Phrase p5 = new Phrase("图书数量", FontChinese); //设置表头信息 Cell cell1 = new Cell(p1); Cell cell2 = new Cell(p2); Cell cell3 = new Cell(p3); Cell cell4 = new Cell(p4); Cell cell5 = new Cell(p5); table.addCell(cell1); table.addCell(cell2); table.addCell(cell3); table.addCell(cell4); table.addCell(cell5); //获取所有图书信息，并显示 BookInfoDao dao = new BookInfoDao(); List<BookInfo> list = dao.findAll(); for (int i = 0; i < list.size(); i++) { BookInfo book = list.get(i); Phrase p6 = new Phrase(book.getBookName(), FontChinese); Cell c1 = new Cell(p6); Phrase p7 = new Phrase(book.getIsbn()); Cell c2 = new Cell(p7); Phrase p8 = new Phrase(book.getAuthor(), FontChinese); Cell c3 = new Cell(p8); Phrase p9 = new Phrase(book.getPrice()); Cell c4 = new Cell(p9); Phrase p10 = new Phrase(book.getStock()); Cell c5 = new Cell(p10); table.addCell(c1); table.addCell(c2); table.addCell(c3); table.addCell(c4); table.addCell(c5); } document.open(); document.add(table); document.close(); } catch (Exception e) { e.printStackTrace(); } response.setContentType("application/pdf"); response.setHeader("Content-Disposition", "attachment;Filename=" + "aa" + ".pdf"); response.setContentLength(buffer.size()); ServletOutputStream out = response.getOutputStream(); buffer.writeTo(out); out.flush(); out.close(); } }