敏感文字替换

package cn.itcast.web.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.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.itcast.web.decorator.MyResponse;public class TransferFilter implements Filter {	public void destroy() {	}	public void doFilter(ServletRequest req, ServletResponse res,FilterChain chain) throws IOException, ServletException {		HttpServletRequest request = (HttpServletRequest) req;		HttpServletResponse response = (HttpServletResponse) res;		MyResponse myResponse = new MyResponse(response);		response.setContentType("text/html;charset=UTF-8");		chain.doFilter(request,myResponse);		byte[] data = myResponse.getBuffer();		String message = new String(data,"UTF-8");		if(message.contains("中国")){			message = message.replaceAll("中国","中国");		}		response.getWriter().write(message);	}	public void init(FilterConfig filterConfig) throws ServletException {	}}