import codec.base64.standard as base64
import codec.json as json

function to_timestamp(t)
@begin
    return base64.encode(json.to_string(json.from_var({
        "year": t.year,
        "day" : t.yday,
        "hour": t.hour,
        "min" : t.min
    }.to_hash_map())))
@end
end
 
function from_timestamp(t)
    return json.to_var(json.from_string(base64.decode(t)))
end

var str = to_timestamp(runtime.local_time())
var obj = from_timestamp(str)

system.out.println(to_string(1900 + obj.year) + "年" + obj.day + "日" + obj.hour + "时" + obj.min + "分")
system.out.println(str)