struts2自定义拦截器的实现及使用

末蓝、 2022-06-02 06:09 135阅读 0赞

import org.apache.struts2.ServletActionContext;
    
    import com.delicious.entity.Users;
    import com.opensymphony.xwork2.ActionInvocation;
    import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
    //检查用户是否登陆&&是不是管理员身份
    //继承拦截器AbstractInterceptor抽象类或者实现Interceptor接口
     public class SecurityInterceptor extends AbstractInterceptor {
    
    	private static final long serialVersionUID = 1L;
    
    	@Override
    	public String intercept(ActionInvocation invocation) throws Exception {
    		Users user = (Users) ServletActionContext.getContext().getSession().get("user");
    		if (user == null) {
    			return "error";
    		}else if (!user.getIsAdmin()) {
    			return "error";
    		}else {
    			return invocation.invoke();
    		}
    		
    	}
    
    }
    
    
    //struts.xml文件
    //其中红色部分是对拦截器的配置
    //粗体部分为拦截器的使用
     <package name="admin" namespace="/admin" extends="struts-default">
    
    		<interceptors>
    			<interceptor name="security"
    			class="com.delicious.interceptor.SecurityInterceptor"></interceptor> <interceptor-stack name="sshValueStack"> <interceptor-ref name="security" /> <interceptor-ref name="paramsPrepareParamsStack"> <param name="alwaysInvokePrepare">false</param> </interceptor-ref> </interceptor-stack> </interceptors> <default-interceptor-ref name="sshValueStack"></default-interceptor-ref> <global-results> <result name="error" type="redirectAction"> <param name="actionName">error</param> <param name="namespace">/</param> </result> </global-results>
    
    		<action name="foods-*" class="adminFoodsAction" method="{1}">
    			<interceptor-ref name="fileUpload">
    				<param name="maximumSize ">10485760</param>
    				<param name="allowedExtensions ">jpg,png,gif</param>
    			</interceptor-ref>
    			<interceptor-ref name="sshValueStack" />
    
    			<result name="list">/admin/foods_list.jsp</result>
    			<result name="save" type="redirectAction">foods-list</result>
    			<result name="edit">/admin/foods_input.jsp</result>
    			<result name="delete" type="redirectAction">foods-list</result>
    			<result name="input" type="redirectAction">foods-list</result>
    		</action>
    
    		<action name="messages-*" class="adminMessagesAction" method="{1}">
    			<result name="list">/admin/messages_list.jsp</result>
    			<result name="*" type="redirectAction">messages-list</result>
    		</action>
    
    </package>