Struts拦截器使用

创建拦截器java程序

package cn.itcast.oa.util;

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

public class CheckPrivilegeInterceptor extends AbstractInterceptor {
	public String intercept(ActionInvocation invocation) throws Exception {
		//放行
		System.out.println("----------->之前");
		String result = invocation.invoke();
		System.out.println("----------->之后");
		return result;
	}

}

　　

更新struts.xml, 在package里写拦截器内容

<package name="default" namespace="/" extends="struts-default">
	    <interceptors>
	    	<!-- 声明拦截器 -->
	    	<interceptor name="checkPrivilege" class="cn.itcast.oa.util.CheckPrivilegeInterceptor"></interceptor>
	    	<!-- 重写定义默认的拦截器栈 -->
	    	<interceptor-stack name="defaultStack">
	    		<interceptor-ref name="checkPrivilege"></interceptor-ref>
	    		<interceptor-ref name="defaultStack"></interceptor-ref>
	    	</interceptor-stack>
	    </interceptors>