interceptor

package com.briup.web.interceptor;

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

public class MyInterceptor implements Interceptor{

@Override
public void destroy() {

System.out.println("in destory() of MyInterceptor");

}

@Override
public void init() {
System.out.println("in init() of MyInterceptor");
}

@Override
public String intercept(ActionInvocation ai) throws Exception {

System.out.println("before...");
//ai.invoke();其实就是调用action中将要执行的方法，比如execute方法
//ai.invoke()的返回值其实就是action中方法执行完成返回的字符串
String s = ai.invoke();

System.out.println("after...");
return s;
}

}