<%@ page contentType="text/html; charset=gb2312" %>
<%@ page import="java.io.*"%>
<%!
public String toUtf8String(String s)
{
StringBuffer sb = new StringBuffer();
for (int i=0;i<s.length();i++) {
char c = s.charAt(i);
if (c >= 0 && c <= 255) {
sb.append(c);
} else {
byte[] b;
try {
b = Character.toString(c).getBytes("utf-8");
} catch (Exception ex) {
System.out.println(ex);
b = new byte[0];
}
for (int j = 0; j < b.length; j++) {
int k = b[j];
if (k < 0) k += 256;
sb.append("%" + Integer.toHexString(k).
toUpperCase());
}
}
}
return sb.toString();
}
%>
<%
String filename=new String(request.getParameter("filename").getBytes("ISO8859-1"),"GBK");
String dirName="D:/我.doc";
java.io.File ff=null;
String dd=dirName+System.getProperties().getProperty("file.separator")+filename;
try{
ff=new java.io.File(dd);
}
catch(Exception e){
System.out.println(e.getMessage());
e.printStackTrace();
}
if (ff!=null&&ff.exists()&&ff.isFile())
{
long filelength = ff.length();
InputStream inStream=new FileInputStream(dd);
//设置输出的格式
response.reset();
response.setContentType("application/x-msdownload");
response.setContentLength((int)filelength);
response.addHeader("Content-Disposition","attachment; filename=\"" + toUtf8String(filename) + "\"");
//循环取出流中的数据
byte[] b = new byte[100];
int len;
while((len=inStream.read(b)) >0)
response.getOutputStream().write(b,0,len);
inStream.close();
out.clear();
out = pageContext.pushBody();
}
%>
：<a href="d.jsp">aa</a>
上面的那个是用流写的 但是也可以用超链接下载
你写上文件的路径就可以了