package tarena.netctoss.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;import javax.servlet.http.HttpServletResponse;public class ChineseFilter implements Filter {	private FilterConfig filterconfig;	public void init(FilterConfig filterconfig) throws ServletException {		this.filterconfig = filterconfig;	}	public void doFilter(ServletRequest request,            ServletResponse response,            FilterChain chain)throws IOException,ServletException{			String encoding = filterconfig.getInitParameter("encoding");			request.setCharacterEncoding(encoding);			chain.doFilter(request, (HttpServletResponse)response);	}	public void destroy() {		filterconfig = null;	}}