httpfilter.java

自己写的一个java购销系统

package com.yuanjin.mtgx.action.filter;


import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public abstract class HttpFilter implements Filter {
	private FilterConfig config;

	public void destroy() {

	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		doFilter((HttpServletRequest)request,(HttpServletResponse)response,chain);
	}
	public abstract void doFilter(HttpServletRequest request,HttpServletResponse response,
			FilterChain chain)throws ServletException,IOException;

	public void init(FilterConfig config) throws ServletException {
		this.config=config;
		init();

	}
	public void init()throws ServletException{
		
	}
	public FilterConfig getFilterConfig(){
		return config;
	}
	public String getInitParameter(String name){
		return config.getInitParameter(name);
	}
	public ServletContext getServletContext(){
		return config.getServletContext();
	}
	

}