创建和配置过滤器

1.第一步：过滤器是实现

    package interceptor;

import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;

import utils.StringContonts;
import model.UserInfo;

public class AutoInterceptor extends MethodFilterInterceptor {
    @Override
    protected String doIntercept(ActionInvocation ai) throws Exception {
        // TODO Auto-generated method stub
        Map<String, Object> session = ai.getInvocationContext().getSession();
        //当前角色id
        UserInfo userInfo =(UserInfo) session.get(StringContonts.SESSION_USER);
        String path=ServletActionContext.getServletContext().getContextPath();
        String realPath=ServletActionContext.getRequest().getServletPath();
        //登录验证
        if(userInfo == null&&!realPath.contains("loginAdmin")) {
            HttpServletResponse res=ServletActionContext.getResponse();
            res.setCharacterEncoding("UTF-8");
            if(realPath.contains("personcenter")){
                res.getWriter().write("<script>alert(\"你未登录或登录已超时,请重新登录! \");self.parent.parent.location=\""+path+"\";</script>");

               // return "toPerson";
                return null;
            }else if(realPath.contains("manage")){
                res.getWriter().write("<script>alert(\"你未登录或登录已超时,请重新登录! \");self.parent.parent.location=\""+path+"/administrator/login.jsp\"</script>");

  　　　　// return "toAdmin";
                return null;
            }else{
                return ai.invoke();
            }
           
        }
        return ai.invoke();
    }

}

2. 第二步 配置过滤器

<package name="sdzn" extends="struts-default">
    <interceptors>
            <!-- 权限拦截器 -->
         <interceptor name="lauthority" class="interceptor.AutoInterceptor" ></interceptor>
                <interceptor-stack name="lcsfAuthStack">
                    <interceptor-ref name="lauthority" />
                    <interceptor-ref name="defaultStack" />
                </interceptor-stack>
        </interceptors>
        <default-interceptor-ref name="lcsfAuthStack" />
        <global-results>
            <!-- 没通过登录验证 -->
            <result name="toAdmin" type="redirect">/administrator/login.jsp</result>
            <result name="toPerson" type="redirect">/forepage/counties/index.jsp</result>
            <!-- 错误页面 -->
            <result name="error">/administrator/error.jsp</result>
        </global-results>
    </package>