Excel.java 文件源码

/**
 * 向客户端下载文件,弹出下载框.
 *
 * @param response(HttpServletResponse)
 * @param file(需要下载的文件)
 * @param isDel(下载完成后是否删除该文件)
 * @throws IOException
 */
public static void exportFile(HttpServletResponse response, File file, boolean isDel) throws IOException {
    OutputStream out = null;
    InputStream in = null;

    // 获得文件名
    String filename = URLEncoder.encode(file.getName(), "UTF-8");
    response.reset();
    // 定义输出类型(下载)
    response.setContentType("application/x-msdownload");
    response.setHeader("Location", filename);
    // 定义输出文件头
    response.setHeader("Content-Disposition", "attachment;filename=" + filename);
    out = response.getOutputStream();
    in = new FileInputStream(file.getPath());

    byte[] buffer = new byte[1024];
    int i = -1;
    while ((i = in.read(buffer)) != -1) {
        out.write(buffer, 0, i);
    }

    in.close();
    out.close();

    if (isDel) {
        //删除文件,删除前关闭所有的Stream.
        file.delete();
    }

}