myfilter.java

struts的一些用的书籍

package app21a.filter;

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;
import javax.servlet.http.HttpServletRequest;

public class MyFilter implements Filter {
  private FilterConfig filterConfig;


  public void init(FilterConfig filterConfig) throws ServletException {
    System.out.println("Filter initialized");
    this.filterConfig = filterConfig;
  }

  public void destroy() {
    System.out.println("Filter destroyed");
    this.filterConfig = null;
  }
  
  public void doFilter(ServletRequest request, ServletResponse response,
    FilterChain chain)
    throws IOException, ServletException {
       
    System.out.println("doFilter");
    chain.doFilter( new MyRequestWrapper((HttpServletRequest) request), response);
  }

}