用JSP下载word文件（不会直接用IE打开）

<%@page import="java.util.*"%>
<%@page import="java.io.*"%>
<%@page import="java.net.*"%>
<%
    string filename = "";
    if (request.getparameter("file") != null) {
        filename =     request.getparameter("file");
    }
    response.setcontenttype("application/msword");
    response.setheader("content-disposition","attachment; filename="+filename);

    bufferedinputstream bis = null;
    bufferedoutputstream bos = null;
    try {
        bis = new bufferedinputstream(new fileinputstream(getservletcontext().getrealpath("" + filename)));
        bos = new bufferedoutputstream(response.getoutputstream());

        byte[] buff = new byte[2048];
        int bytesread;

        while(-1 != (bytesread = bis.read(buff, 0, buff.length))) {
            bos.write(buff,0,bytesread);
        }

    } catch(final ioexception e) {
        system.out.println ( "出现ioexception." + e );
    } finally {
        if (bis != null)
            bis.close();
        if (bos != null)
            bos.close();
    }
    return;
%>