How can I change the @timestamp match my timestamp?

Elastic Stack Logstash
1

I found that the @timestamp always show UTC time,
i tried to using date filter to match my timezone ("Asia/Shanghai")
timestamp as follows,

"@timestamp" => "2016-04-21T08:39:35.884Z"

my date filter ,

 date {
       match => [ "timestamp" , "yyyy-mm-dd'T'HH:MM:ss'Z' +0800" ]
       timezone => "UTC"
 }

but the date filter seems not working ,
any help would be appreciated.

2

The @timestamp field is supposed to be in UTC. Do not attempt to change this. It's up to the presentation layer (e.g. Kibana) to make timezone adjustments as necessary.

3

But Logstash generates indexes based on @timestamp with UTC time,
if I can change the @timestamp to my timezone direct, I think I can directly
search the index.
can I trick Logstash by setting the timezone of the date filter to UTC?
but the date filter seems not working ,what's wrong with it?