ipfilter.java

j2ee编程技术中的一些代码

/*
 * Created on 2004-6-13
 *
 * To change the template for this generated file go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;

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;

/**
 * @author haoyulong
 *
 * To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
public class IPFilter implements Filter {
	private FilterConfig filterConfig = null;
	public void init(FilterConfig config) throws ServletException {
		//TODO Method stub generated by Lomboz
		filterConfig=config;
	}
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		//TODO Method stub generated by Lomboz
		try 
		{ 
 
		response.setContentType("text/html;charset=GBK"); 
		
		String remoteAddr = ((HttpServletRequest) request).getRemoteAddr();
		   PrintWriter out = response.getWriter();
		   out.println("<font size=6 color=red>filter</font>");
		   chain.doFilter(request,response);
		   out.close();
		//System.out.println(remoteAddr);
		/*if ((remoteAddr.indexOf("127.0.0.1") == -1) && (remoteAddr.indexOf("localhost") == -1)) { // 
		    PrintWriter out = response.getWriter();
		out.println("内部资料，禁止远程访问！"); 
		out.close();
		return;
		} 
		else{
			
			//out.println("通过认证!"); 
			chain.doFilter(request,response);

		}*/
		
		}catch(Exception e){
		//System.out.println(e.toString());
		}

	}
	public void destroy() {
		//TODO Method stub generated by Lomboz
	}
	public FilterConfig getFilterConfig() {
		//TODO Method stub generated by Lomboz
		return null;
	}
	public void setFilterConfig(FilterConfig config) {
		//TODO Method stub generated by Lomboz
	}
}