코드 15-2 Cart.java
package com.springmvc.domain;
...
import java.io.Serializable;
public class Cart implements Serializable {
private static final long serialVersionUID = 2155125089108199199L; ➊
...
}
코드 15-3 CartItem.java
package com.springmvc.domain;
import java.io.Serializable;
public class CartItem implements Serializable {
private static final long serialVersionUID = 3636831123198280235L; ➊
...
}