java下载页面的显示类，可以直接调用

public static void download(String path, HttpServletResponse response) {
try {
// path是指欲下载的文件的路径。
File file = new File(path);
// 取得文件名。
String filename = file.getName();
// 以流的形式下载文件。
InputStream fis = new BufferedInputStream(new FileInputStream(path));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
// 清空response
response.reset();
// 设置response的Header
Long newDate=new Date().getTime();
response.addHeader("Content-Disposition", "attachment;filename="
+java.net.URLEncoder.encode("顺义区律师值班表"+newDate+".xls", "UTF-8"));
response.addHeader("Content-Length", "" + file.length());
OutputStream toClient = new BufferedOutputStream(
response.getOutputStream());
response.setContentType("application/vnd.ms-excel;charset=gb2312");
toClient.write(buffer);
toClient.flush();
toClient.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}