jsp 自动下载某个文件

<%@ page contentType="application/x-xls;charset=GBK" %>
<%@ page import="java.io.File,java.io.FileInputStream" %>
<%@ page import="javax.servlet.ServletOutputStream" %>
<%
out.clear();
out = pageContext.pushBody();
response.setHeader("Content-disposition", "inline;filename=test.xls");
File fileLoad = new File("D:/", "test.xls");
long fileLength = fileLoad.length();
String length = String.valueOf(fileLength);
response.setHeader("Content_Length", length);
FileInputStream input =null;
ServletOutputStream output = null;
try {
input = new FileInputStream(fileLoad);
output = response.getOutputStream();
byte[] block = new byte[1024];
int len = 0;
while ( (len = input.read(block))!=-1) {
output.write(block, 0, len);
}
}
catch (Exception e) {
e.getMessage();
}
finally{
try{
input.close();
output.flush();
output.close();
}
catch(Exception ex){
ex.getMessage();
}
}
%>

response.setHeader("Content-disposition","attachment; filename="+fileName);//在一个新的页面打开附件

response.setHeader("Content-disposition", "inline;filename=test.xls");//在当前页面打开