springmvc过滤器

package com.yxjn.myapp;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class TestFilter implements Filter {

   public void destroy() {
      System.out.println("过滤器[TestFilter]destroy......");
  }

   public void doFilter(ServletRequest req, ServletResponse res,
            FilterChain chain) throws IOException, ServletException {
        //拦截器之前先进行这一步
        System.out.println("过滤器[TestFilter]doFilter......1");
        chain.doFilter(req, res);
    }

   public void init(FilterConfig arg0) throws ServletException {
        //启动就执行这一步
       System.out.println("过滤器[TestFilter]init.....");
  }

}

<filter>
 <filter-name>myFilter</filter-name>
  <filter-class>com.yxjn.myapp.TestFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>myFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>