Question

Java实现文件流下载文件，浏览器无反应，后台无错误！如何解决？

response.setCharacterEncoding("UTF-8");
response.setContentType("application/octet-stream");//APPLICATION/OCTET-STREAM
response.addHeader("Content-Disposition", "attachment; filename=\""+fileName+"\"");
//response.setContentLength((int)text.length());

byte[] b=new byte[100];
java.io.OutputStream os=null;
java.io.InputStream is=null;
try{
is=new java.io.ByteArrayInputStream(text.getBytes());
os=response.getOutputStream();
int len=0;
while((len=is.read(b))>0){
os.write(b,0,len);
}
response.setStatus( response.SC_OK );
//response.flushBuffer();
//os.flush();
//os.close();
is.close();

}catch(IOException e){
//response.reset();
e.printStackTrace();
}
注释中的方法我都试过了，没有用。请教各位达人指点一二！！！

Answer 1

ServletOutputStream out = response.getOutputStream();

byte[] outputByte = new byte[4096];

while(text.read(outputByte, 0, 4096) != -1)
{
out.write(outputByte, 0, 4096);
}
fileIn.close();
out.flush();
out.close();