JSP下载EXECL文件时报错:java.lang.IllegalStateException: getOutputStream() has already been called for this response
原代码:
<%
//输出文件用的字节数组,每次发送500个字节到输出流:
byte b[]=new byte[500];
//下载的文件:
File fileLoad=new File("c:/","ww.xls");
//客户使用保存文件的对话框:
response.setHeader("Content-disposition","attachment;filename="+"ww.xls");
//通知客户文件的MIME类型:
response.setContentType("application/msexcel");
//通知客户文件的长度:
long fileLength=fileLoad.length();
String length=String.valueOf(fileLength);
response.setHeader("Content_Length",length);
//读取文件book.zip,并发送给客户下载:
FileInputStream in=new FileInputStream(fileLoad);
//获得响应客户的输出流:
OutputStream o=response.getOutputStream();
int n=0;
while((n=in.read(b))!=-1)
{ o.write(b,0,n);
}
o.flush();
//o=pageContent.;
%>
请问如何解决?