struts2简单拦截器

淡淡的烟草味﹌ 2022-05-19 08:20 255阅读 0赞

前置条件：已完成一个简单的struts2登录实例

1、在src>tool包下新建拦截器实现类MyInterceptor.java

package tool;
    import com.opensymphony.xwork2.ActionInvocation;
    import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
    import action.MainAction;
    
    public class MyInterceptor extends AbstractInterceptor{
    
    	@Override
    	public String intercept(ActionInvocation arg0) throws Exception {
    		// TODO Auto-generated method stub
    		MainAction mainAction=(MainAction)arg0.getAction();//获得action拦截对象
    		//编写拦截规则，如果登录名为Admin或admin则页面跳转至login.jsp
    		if(mainAction.getUser().getAccount().equals("admin")||
    				mainAction.getUser().getAccount().equals("Admin")){
    			return mainAction.INPUT;
    		}else{
    			return arg0.invoke();//继续执行action类，或其他拦截器
    		}
    	}
    }

2、在配置文件strut.xml中配置引用拦截器

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE struts PUBLIC
            "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
            "http://struts.apache.org/dtds/struts-2.0.dtd">
    	<struts>
    		<package name="default" extends="struts-default">
    
    			<interceptors>
    				<interceptor name="myinterceptor" class="tool.MyInterceptor">
    				</interceptor>
    			</interceptors>
    
    			
    			<action name="main" class="action.MainAction">				
    				<result name="success">/success.jsp</result>
    				<result name="error">/error.jsp</result>
    				<result name="input">/login.jsp</result>
    				
    				
    				<interceptor-ref name="defaultStack"/>
    				<interceptor-ref name="myinterceptor"></interceptor-ref>
    			</action>
    
    		</package>
    		
    	</struts>

3、保存后启动Tomcat，使用浏览器验证admin用户名

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[70]: /images/20220519/b9a248eaec624567a64f9813f019f57e.png
[70 1]: /images/20220519/058eea9829a842dc855183e24b4fb540.png