charactorencodingfilter.java

一个经典购物车（shoppingcart）实例代码

package com.jpioneer.application.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 CharactorEncodingFilter implements Filter {
   private String charactor="gb2312";
	public void init(FilterConfig arg0) throws ServletException {
		String str=arg0.getInitParameter("charactor");
		if(str!=null && !"".equals(str)){
			this.charactor=str;
		}
		
	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
		arg0.setCharacterEncoding(charactor);
		arg1.setCharacterEncoding(charactor);
		arg2.doFilter(arg0,arg1);
		
	}

	public void destroy() {
		// TODO Auto-generated method stub
		
	}

}