試圖獲取存儲在會話浮點或整數值

Question

我已經存放在兩個不同屬性的兩個整數值

session.setAttribute("passengers", new Integer(passengers)) 
session.setAttribute("luggages", new Integer(luggages)); 

但是當我試圖通過

Integer passengers = (Integer) session.getAttribute("passengers") 
Integer luggages = (Integer) session.getAttribute("luggages"); 

我讓他們在一個請求得到

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer 

Answer 1

可以使用

int passengers = Integer.parseInt((String) session.getAttribute("passengers")) 
int luggages = Integer.parseInt((String)session.getAttribute("luggages"));