在jsp页面中直接打开excel

在jsp页面中直接打开excel.

response.setContentType("application/vnd.ms-excel");
File file =new File("D:/test.xls");
FileInputStream in=new FileInputStream(file);
byte[] buffer=new byte[in.available()];
in.read(buffer);
response.getOutputStream().write(buffer);
response.getOutputStream().flush();