setcharfilter.java

一个简单的AJAX图书展示平台

package com.ascent.util;

import java.io.IOException;

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

import com.ascent.bean.Loginvip;;

public class SetCharFilter implements Filter
{
	String encoding="null";
	FilterConfig filterconfig=null;
	public void init(FilterConfig filterconfig)throws ServletException
	{
		this.filterconfig=filterconfig;		
		this.encoding=filterconfig.getInitParameter("encoding");
		System.out.println(encoding);
	}
	public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain)
	                    throws IOException ,ServletException
	{
		request.setCharacterEncoding(this.encoding);
		HttpServletRequest req=(HttpServletRequest)request;
		Loginvip login=null;
		req.getSession().setAttribute("user",login);
		chain.doFilter(request,response);
	}
	public void destroy()
    {
		this.encoding=null;
		this.filterconfig=null;
    }
}