jsp文件下载后，内容是空的
代码如下
<%@page import="java.io.FileInputStream"%>
<%@page import="java.io.OutputStream"%><%@ page
contentType="text/html; charset=utf-8"%>
<%
String fileName = "freebsd.iso";
String filePath = "e:\\";

out.clear();
response.reset();
response.setContentType("application/x-download");
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
OutputStream os = response.getOutputStream();
try {
FileInputStream fis = new FileInputStream(filePath + fileName);
try {
byte[] buffer = new byte[1024 * 10];
for (int read; (read = fis.read(buffer)) != -1;) {
os.write(buffer, 0, read);
}
} finally {
fis.close();
}
} finally {
os.close();
}
%>

执行后，文件已经下载过来了，但是内容是空的，请教是什么原因啊？


[解决办法]
没有读取到内容吧。。
byte[] buffer = new byte[1024 * 10];
while(read = fis.read( buffer,0 ,1024 * 10 )) != -1;) {
os.write(buffer, 0, read);
}看看行么

[解决办法]
os.write(buffer, 0, buffer.length);
[解决办法]
为什么用for循环呢？
个人觉得用while循环好一些
int length=0;
while((read = fis.read(buffer)) != -1)
{
os.write(buffer, 0, length);
}
[解决办法]