encodingfilter.java

用Struts做的聊天系统

package com.chat.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;

public class EncodingFilter implements Filter{
	
	String encoding=null;
	FilterConfig config=null;

	public void destroy() {
		
		if(encoding!=null){
			encoding=null;
		}
		
		if(config!=null){
			config=null;
		}
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
//		if(encoding!=null)
//		{
//			request.setCharacterEncoding(encoding);
//		}
		System.out.println(encoding+"------------filter");
		request.setCharacterEncoding(encoding);
		
		chain.doFilter(request, response);
			
	}

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