使用spring mvc做文件下载时ie浏览器文件名乱码和下载不了问题解决

来源：互联网发布：香酸枣淘宝编辑：程序博客网时间：2024/04/28 01:28

使用spring mvc做文件下载时遇到了一个问题，就是下载的文件的文件名会出现乱码的情况，代码如下

    @RequestMapping("/downloadFileT")        public ResponseEntity<byte[]> downloadFileT(Upload upload) throws IOException {            if (upload != null && upload.getNewName() != null) {            File file = new File(upload.getPath(), upload.getNewName());            if (file.exists()) {            String fileName = "";                if(request.getHeader("USER-AGENT").toLowerCase().contains("msie")){                fileName = URLEncoder.encode(upload.getName() , "UTF-8");                }else{                fileName = new String(upload.getName().getBytes("utf-8"),"iso-8859-1");                }                HttpHeaders headers = new HttpHeaders();              headers.setContentDispositionFormData("attachment;filename="+ fileName +";", fileName);               headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);               return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),                                              headers, HttpStatus.CREATED);                }        }        return null;    }

但是这样在ie浏览器下还是会出现文件名乱码和文件下载不了，后来发现ie浏览器是不支持201状态码的，则改成200，但是还是发现有问题，原因是ie11或者win10中用户代理字符串已经修改了，不再是“msie”了，添加了like Gecko，所以加上like gecko判断

修改代码如下，则成功运行

    @RequestMapping("/downloadFileT")        public ResponseEntity<byte[]> downloadFileT(Upload upload) throws IOException {            if (upload != null && upload.getNewName() != null) {            File file = new File(upload.getPath(), upload.getNewName());            if (file.exists()) {            String fileName = "";            String useragent = request.getHeader("USER-AGENT").toLowerCase();                if(useragent.contains("msie")||useragent.contains("like gecko")||useragent.contains("trident")){                //ie11或者win10中用户代理字符串已经修改了，不再是“msie”了，添加了like Gecko，所以加上like gecko判断                fileName = URLEncoder.encode(upload.getName() , "UTF-8");                }else{                fileName = new String(upload.getName().getBytes("utf-8"),"iso-8859-1");                }                HttpHeaders headers = new HttpHeaders();              headers.setContentDispositionFormData("attachment;filename="+ fileName +";", fileName);               headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);               return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),                            headers, HttpStatus.OK);    //ie浏览器不支持201的状态码，所以改成200 HttpStatus.OK
 } } return null; }

阅读全文

0 0