看看小弟我的程序，打开word乱码

<%@ page contentType="application/msword;charset=GB2312" language="java" import="java.text.*,java.util.*,java.io.*,java.sql.*"%><% java.io.File f=new java.io.File("D:/Program Files/Apache Software Foundation/Tomcat 6.0/webapps/myapp/aa.doc");FileInputStream fin=new FileInputStream(f);OutputStream output=response.getOutputStream();byte[] buf=new byte[1024];int r=0;response.setContentType("application/msword;charset=GB2312");while((r=fin.read(buf,0,buf.length))!=-1){output.write(buf,0,r);//response.getOutputStream()}fin.close();output.close();%>