我有,我定义的会话变量名称这样一个java Constant.java文件: package com.pakageName;
public class Config {
// name of sessions var
public static final String ATT_SESSION_USER = "session_user";
public stati
我有一个Java类是这样的: class Constans {
public static final String FIELD = "example";
}
model.addAttribute(Constants.FIELD, 11);
现在jsp页面 我只是想用这样来访问: <c:out value="${requestScope.Constants.FIELD}"/>
我想设置我的应用程序和Tomcat 8和JSF 2.3上运行,但我得到这个错误: RAVE: Critical error during deployment:
java.lang.NullPointerException
at java.util.Objects.requireNonNull(Objects.java:203)
at javax.el.CompositeEL