1 /**
 2 * 根据filePath将服务器上的图片下载到客户端本地
 3    */
 4 @RequestMapping("/downloadjpg")
 5 public void downloadjpg(@RequestParam(value="http://www.mamicode.com/fileId")String fileId,HttpServletResponse response){
 6     JcyAppealDatum datum=jcyAppealDatumService.get(fileId);
 7     if (datum!=null) {
 8         File file= new File(datum.getFilePath());
 9         if (file.exists()) {
10             InputStream iStream=null;
11             try {
12                 iStream = new FileInputStream(file);
13                 byte[] buffer = new byte[iStream.available()];
14                 iStream.read(buffer);
15                 String fileName = datum.getFileName()+".jpg";
16                 response.setContentType("image/jpeg"); // 设置返回内容格式
17                 // 设置返回相应的头内容,中文名需转码(
18                 String exportName = "attachment;filename=" + new String((fileName).getBytes("gb2312"), "ISO8859-1");
19                 response.setHeader("Content-disposition", exportName);
20                 response.getOutputStream().write(buffer);
21             } catch (Exception e) {
22                 e.printStackTrace();
23             }finally {
24                 try {
25                     iStream.close();
26                 } catch (Exception e2) {
27                     e2.printStackTrace();
28                 }    
29             }
30     }
31             
32     }
33 }