copyrightfilter.java

张新曼 精通JSP Web 开发技术与典型应用 随书光盘源码

package test;

import java.io.*; 
import javax.servlet.*;

/**
 * 
 * @author qq
 *
 * 版权过滤器
 */

public class CopyrightFilter implements Filter{
	protected FilterConfig config; 
	protected String date; 

	public void init(
			FilterConfig filterconfig) throws ServletException{ 
	    this.config=filterconfig; 
	    date=filterconfig.getInitParameter("date"); 
	 } 

	public void doFilter(
			ServletRequest request,
			ServletResponse response,
			FilterChain chain) throws IOException,ServletException{ 
	    chain.doFilter(request,response); 
	    PrintWriter out=response.getWriter();
	    out.println("<br><center><font color='red'>版权所有：西安交通大学电子信息与工程学院</font></center>" );
	    if(date!=null){
	    	out.println("<br><center><font color='red'>"+date+"</font></center>");
	    }
        out.flush();
     } 

	public void destroy(){
		this.config =null;  
	 } 
}