如何在Java项目中使用过滤器、拦截器和监听器

package com.lzw.struts.Interceptor;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;public class MyInterceptor extends MethodFilterInterceptor {  private static final long serialVersionUID = -6410044851077844880L;    private String lzw;  public String getLzw() {    return lzw;  }  public void setLzw(String lzw) {    this.lzw = lzw;  }  @Override  public void destroy() {    System.out.println("destroy!");  }  @Override  public void init() {    System.out.println("init!");  }  @Override  protected String doIntercept(ActionInvocation invocation) throws Exception {    System.out.println("MyInterceptor-start");    System.out.println(lzw);    String result = invocation.invoke();    System.out.println("MyInterceptor-end");    return result;  }}