java下载文件 

 1 /**
 2      * 
 3      * @param file
 4      * @param response
 5      */
 6     private void downLoad(File file, HttpServletResponse response,
 7             String browser) throws IOException {
 8         InputStream is = new FileInputStream(file);
 9         try {
10 
11             String fileName = file.getName().replaceAll(" ", "");
12             OutputStream os = response.getOutputStream();
13             BufferedInputStream bis = new BufferedInputStream(is);
14             BufferedOutputStream bos = new BufferedOutputStream(os);
15 
16             if (browser.indexOf("msie") != -1) {
17                 fileName = java.net.URLEncoder.encode(fileName, "UTF-8");
18                 fileName = new String(fileName.getBytes("UTF-8"), "GBK");
19             } else if (browser.indexOf("Firefox") != -1) {
20                 fileName = java.net.URLEncoder.encode(fileName, "UTF-8");
21                 fileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");
22             } else if (browser.indexOf("Safari") != -1) {
23                 fileName = new String(fileName.getBytes(), "ISO8859-1");
24             }
25 
26             response.reset();
27             response.setCharacterEncoding("UTF-8");
28             response.setContentType("application/x-msdownload");
29             response.setHeader("Content-Disposition", "attachment; filename="
30                     + fileName);
31             int bytesRead = 0;
32             byte[] buffer = new byte[1024];
33             while ((bytesRead = bis.read(buffer)) != -1) {
34                 bos.write(buffer, 0, bytesRead);
35             }
36 
37             bos.flush();
38             bis.close();
39             bos.close();
40 
41             is.close();
42 
43             os.close();
44 
45         } catch (Exception ex) {
46 
47             log.info("");
48 
49         } finally {
50             is.close();
51         }
52     }

 

posted on 2014-10-23 15:56  hellofking  阅读(114)  评论(0)  编辑  收藏  举报

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