ShiroHttpSession.getCreationTime(ShiroHttpSession.java:90)

java.lang.NullPointerException: null
at org.apache.shiro.web.servlet.ShiroHttpSession.getCreationTime(ShiroHttpSession.java:90)
at com.alibaba.druid.support.http.AbstractWebStatImpl.getSessionStat(AbstractWebStatImpl.java:106)
at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:144)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:178)

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

只因 shiro的session timeout设置为0

源码：

        // 会话超时时间->30分钟，单位：毫秒
        sessionManager.setGlobalSessionTimeout(configBean.getSessionTimeout());
        // 定时清理失效会话, 清理用户直接关闭浏览器造成的孤立会话

        sessionManager.setSessionValidationInterval(configBean.getValidationInterval());

配置文件搞错后 configBean.getSessionTimeout() 取得的值为0 因此每次保存完成后跳转的页面 都会报上面的错误 。