java实现word、pdf、excel文件下载功能

直接上代码

@RequestMapping("/download")
    public void download(HttpServletRequest request, HttpServletResponse response){

        File file=new File("C:\\Users\\zhongyj\\Desktop\\testExport01.xls");
        String fileName=file.getName();
        String ext=fileName.substring(fileName.lastIndexOf(".")+1);
        String agent=(String)request.getHeader("USER-AGENT"); //判断浏览器类型
        try {
            if(agent!=null && agent.indexOf("Fireforx")!=-1) {
                fileName = new String(fileName.getBytes("UTF-8"), "iso-8859-1");   //UTF-8编码，防止输出文件名乱码
            }
            else {
                fileName= URLEncoder.encode(fileName,"UTF-8");
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        BufferedInputStream bis=null;
        OutputStream os=null;
        response.reset();
        response.setCharacterEncoding("utf-8");
        if("docx".equals(ext)) {
            response.setContentType("application/msword"); // word格式
        }else if("pdf".equals(ext)) {
            response.setContentType("application/pdf"); // word格式
        }else if("xls".equals(ext)){
            response.setContentType("application/octet-stream;charset=ISO8859-1");
        }
        response.setHeader("Content-Disposition", "attachment; filename=" + fileName);

        try {
            bis=new BufferedInputStream(new FileInputStream(file));
            byte[] b=new byte[bis.available()+1000];
            int i=0;
            os = response.getOutputStream();   //直接下载导出
            while((i=bis.read(b))!=-1) {
                os.write(b, 0, i);
            }
            os.flush();
            os.close();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(os!=null) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }