java 实现对指定目录的文件进行下载
1 @RequestMapping("/exportDocument") 2 @ResponseBody 3 public void exportDocument(HttpServletRequest request,HttpServletResponse response) throws IOException { 4 XWPFDocument xdoc = null; 5 FileInputStream is = null; 6 OutputStream out=null; 7 try { 8 String wordName="数聚空港2.0使用手册.docx"; 9 wordName = new String(wordName.getBytes(), "iso8859-1"); 10 // File file = new File("/root/usersGuide.docx"); 11 response.setContentType("APPLICATION/OCTET-STREAM"); 12 response.setHeader("Content-Disposition", "attachment; filename="+ wordName); 13 is = new FileInputStream("/root/usersGuide.docx"); 14 out=response.getOutputStream();//获得一个output对象 15 xdoc = new XWPFDocument(is); 16 } catch (IOException e) { 17 e.printStackTrace(); 18 }finally{ 19 try { 20 xdoc.write(out);//Write out this document to an Outputstream. 21 is.close(); 22 out.close(); 23 } catch (IOException e) { 24 e.printStackTrace(); 25 } 26 } 27 /*上述是word文档的下载*/ 28 29 30 /*下面是对各种类型的文件下载*/ 31 32 /* 33 34 //2.获取要下载的文件名 35 String fileName = "test.png"; 36 //3.设置content-disposition响应头控制浏览器以下载的形式打开文件 37 response.setHeader("content-disposition", "attachment;filename="+fileName); 38 //4.获取要下载的文件输入流 39 InputStream in=null; 40 OutputStream out=null; 41 try {//获取要下载的文件的绝对路径 42 in=new FileInputStream("/root/运营线路图0.3.5版.png"); 43 int len = 0; 44 //5.创建数据缓冲区 45 byte[] buffer = new byte[1024]; 46 //6.通过response对象获取OutputStream流 47 out = response.getOutputStream(); 48 //7.将FileInputStream流写入到buffer缓冲区 49 while ((len = in.read(buffer)) > 0) {//in.read(byte[] b)最多读入b.length个字节 在碰到流的结尾时 返回-1 50 //8.使用OutputStream将缓冲区的数据输出到客户端浏览器 51 out.write(buffer,0,len); 52 } 53 }catch (FileNotFoundException e) { 54 e.printStackTrace(); 55 }finally{ 56 in.close(); 57 out.close(); 58 }*/ 59 }