struts2——自定义拦截器！！！

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

public class MyInterceptor implements Interceptor {
public String intercept(ActionInvocation invocation) throws Exception {
long start = System.currentTimeMillis();
String str = invocation.invoke();
long end = System.currentTimeMillis();
System.out.println("action time:" + (end - start));
return str;
}

public void destroy() {
}

public void init() {
}
}

<struts>
<package name="test" namespace="/" extends="struts-default">
<interceptors>
<interceptor name="myinterceptor" class="test.MyInterceptor"/>
</interceptors>
<action name="test" class="test.Test">
<result name="success">/hello.jsp</result>
<interceptor-ref name="myinterceptor"/>
<interceptor-ref name="defaultStack"/>
</action>
</package>
</struts>