JSF实现下载功能代码,Java代码库,德仔网

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【Java】 JSF实现下载功能

作者:一丁 / 发布于2015/4/21/ 441

在jsp页面上的代码如下：

<h:commandLink id="file1" value="下载报告的word文档" action="#{ReadTxtOutWord.download}" type="button"> </h:commandLink>


	public class ReadTxtOutWord {

	 /**
	 * 下载文档
	 * @return
	 */
	 public String download() {
	 String path="D:\\";
	 //String fileName="outWord.doc";
	 try {
	 FacesContext ctx = FacesContext.getCurrentInstance();
	 ctx.responseComplete();
	 String contentType = "application/x-download";

	 HttpServletResponse response = (HttpServletResponse) ctx.getExternalContext().getResponse();
	 response.setContentType(contentType);
	 StringBuffer contentDisposition = new StringBuffer();
	 contentDisposition.append("attachment;");
	 contentDisposition.append("filename=\"");
	 contentDisposition.append(fileName);
	 contentDisposition.append("\"");
	 response.setHeader("Content-Disposition", new String(contentDisposition.toString().getBytes(System.getProperty("file.encoding")),"iso8859_1"));
	 ServletOutputStream out = response.getOutputStream();
	 byte[] bytes = new byte[0xffff];
	 InputStream is = new FileInputStream(new File(path + fileName));
	 int b = 0;
	 while ((b = is.read(bytes, 0, 0xffff)) > 0) {
	 out.write(bytes, 0, b);
	 }
	 is.close();
	 out.flush();
	 ctx.responseComplete();
	 } catch (Exception e) {
	 e.printStackTrace();
	 }
	 return null;
	 }
	 private static void outWord()
	 {
	 Document document = new Document(PageSize.A4);

	 try
	 {
	 RtfWriter2.getInstance(document,new FileOutputStream("E:/outWord.doc"));
	 document.open();
	 Paragraph ph=new Paragraph("源项数据",new Font(Font.BOLD,20,Font.BOLDITALIC));
	 ph.setAlignment(1);
	 document.add(ph);
	
	 ph=new Paragraph("源项数据1",new Font(Font.BOLD,15,Font.NORMAL));
	 ph.setAlignment(1);
	 document.add(ph);
	
	 RtfHeaderFooter headers= new RtfHeaderFooter(new Phrase("This header is only on left hand pages"));
	 document.setHeader(headers);
	 Table table=new Table(4);
	 table.setBorder(0);
	 table.setBorderWidth(1);
	 table.setBorderColor(Color.BLACK);
	 table.setPadding(0);
	 table.setSpacing(0);
	
	 Cell cell=new Cell("源项名称");
	 cell.setHeader(true);
	 cell.setBackgroundColor(new Color(210,51,5));
	 table.addCell(cell);
	 cell=new Cell("释放时间");
	 cell.setHeader(true);
	 cell.setBackgroundColor(new Color(210,51,5));
	 table.addCell(cell);
	 table.addCell("释放地点");
	 table.addCell("释放计量");
	 table.endHeaders();
	
	 table.addCell("UF6");
	 table.addCell("2011.2.1 12:20:41");
	 table.addCell("东京西城区");
	 table.addCell("45675.23");
	

	 table.addCell("UF6");
	 table.addCell("2011.2.1 12:20:41");
	 table.addCell("东京西城区");
	 table.addCell("45675.23");
	 document.add(table);
	
	 Chunk chunk = new Chunk("Hello world", FontFactory.getFont(FontFactory.COURIER, 20, Font.ITALIC, new Color(255, 0, 0)));
	 document.add(chunk);
	
	 Paragraph p1 = new Paragraph(new Chunk("This is my first paragraph.", FontFactory.getFont(FontFactory.HELVETICA, 12)));
	 Paragraph p2 = new Paragraph(new Phrase("This is my second paragraph.", FontFactory.getFont(FontFactory.HELVETICA, 12)));
	 Paragraph p3 = new Paragraph("This is my third paragraph.", FontFactory.getFont(FontFactory.HELVETICA, 12));
	
	 document.add(p1);
	 document.add(p2);
	 document.add(p3);
	
	 document.close();
	 System.out.println("文档生成成功！");
	 } catch (FileNotFoundException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 } catch (DocumentException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 } catch (IOException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 }finally
	 {
	
	 }
	 }
	}

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