Struts2非常简单实用的身份验证功能

     <package name="admin" extends="struts-default">
         <interceptors>
      <!-- 定义了一个名为authority的拦截器，注意拦截器的class -->
             <interceptor name="authenticationInterceptor" class="interceptor.AdminAuthInterceptor" />
              <interceptor-stack name="defualtSecurityStackWithAuthentication">
                <interceptor-ref name="defaultStack" />
                <interceptor-ref name="authenticationInterceptor" />
              </interceptor-stack>
        </interceptors>
        <default-interceptor-ref name="defualtSecurityStackWithAuthentication" />
        <!-- 全局Result，让验证不通过的都跳到该result -->
        <global-results>
              <result name="tologin">/WEB-INF/jsp/login.jsp</result>
        </global-results>

package interceptor;

import com.dao.Commonaction;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class AdminAuthInterceptor extends AbstractInterceptor {
    private static final long serialVersionUID = -5114658085937727056L;

    @Override
    public String intercept(ActionInvocation invocation) throws Exception {
                //执行验证动作
        if (验证成功) {
            return invocation.invoke();
        }
        return "tologin";
    }
}