characterencodingfilter.java

网上商城代码

package com.fendou.platform;

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 CharacterEncodingFilter implements Filter{

	protected FilterConfig config;
	protected String encoding=null;
	protected boolean enable=true;	
	
	public void destroy() {		
		
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		if(this.enable || request.getCharacterEncoding()==null){
			String encoding=this.encoding;
			if(encoding!=null){
			  request.setCharacterEncoding(encoding);
			  response.setCharacterEncoding(encoding);
			}
		}
		response.setContentType("text/html; charset="+encoding);
		chain.doFilter(request, response);
	}

	public void init(FilterConfig config) throws ServletException {
		this.config=config;;
		this.encoding=config.getInitParameter("encoding");
		String value=config.getInitParameter("enable");
		if(value==null)
			this.enable=false;
		else if(value.equalsIgnoreCase("true"))
		    this.enable=true;
		else if(value.equalsIgnoreCase("yes"))
			this.enable=true;
		else 
			this.enable=false;
	}	
	
	
	

}