自定义拦截器实现用户未登录自动跳转到登录页面

た入场券 2022-03-20 03:48 656阅读 0赞

1.自定义拦截器，没有登录跳转到login.jsp页面

public class BOSLoginInterceptor extends MethodFilterInterceptor{
    
    	@Override
    	protected String doIntercept(ActionInvocation invocation) throws Exception {
    		//获取session中的user
                    //--》ServletActionContext.getRequest().getSession().getAttribute("user");
    		User user = BOSUtils.getLoginUser();
    		if(user==null){
    			//跳转到登录页面
    			return "login";
    		}
    		//放行
    		return invocation.invoke();
    	}
    
    }

2.在struts.xml中配置  不能拦截login方法

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">
    <struts>
    	<constant name="struts.devMode" value="false" />
    	
    	<package name="basicstruts2" extends="struts-default">
    		<interceptors>
    			
    			<interceptor name="bosLoginInterceptor" class="com.it.web.interceptor.LoginInterceptor">
    				
    				<param name="excludeMethods">login</param>
    			</interceptor>
    			
    			<interceptor-stack name="myStack">
    				<interceptor-ref name="bosLoginInterceptor"></interceptor-ref>
    				<interceptor-ref name="defaultStack"></interceptor-ref>
    			</interceptor-stack>
    		</interceptors>
    		<default-interceptor-ref name="myStack"/>
    		
    		
    		<global-results>
    			<result name="login">/login.jsp</result>
    		</global-results>
    		
    		
    	</package>
    </struts>