HttpSessionImpl.java 文件源码

@Override
public void removeAttribute(String name) {
    if (attributes != null) {
        Object value = attributes.get(name);
        if (value != null && value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
        }
        attributes.remove(name);
    }
}