文件下载

文件名非中文下载设置

private void download1(HttpServletResponse response)
            throws FileNotFoundException, IOException {
        String realpath = this.getServletContext().getRealPath("/download/1.jpg");
        String filename = realpath.substring(realpath.lastIndexOf("\\")+1);
        
        response.setHeader("Content-disposition", "attachment;filename=" + filename);
        
        FileInputStream in = new FileInputStream(realpath);
        int len = 0;
        byte buffer[] = new byte[1024];
        OutputStream out = response.getOutputStream();
        while ((len = in.read(buffer))>0){
            out.write(buffer, 0, len);
        }
        
        in.close();
    }

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文件为中文的下载设置

//中文文件下载，需要用URL编码
    private void download2(HttpServletResponse response)
            throws FileNotFoundException, IOException {
        String realpath = this.getServletContext().getRealPath("/download/图片.jpg");
        String filename = realpath.substring(realpath.lastIndexOf("\\")+1);
        
        //URLEncoding URL编码
        response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(filename,"UTF-8"));
        
        FileInputStream in = new FileInputStream(realpath);
        int len = 0;
        byte buffer[] = new byte[1024];
        OutputStream out = response.getOutputStream();
        while ((len = in.read(buffer))>0){
            out.write(buffer, 0, len);
        }
        
        in.close();
    }