javaweb简单留言版

package 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; public class characterEncodingFilter implements Filter { private FilterConfig config; public void destroy() { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { request.setCharacterEncoding(config.getInitParameter("charset")); HttpServletRequest hrequest = (HttpServletRequest)request; HttpServletResponse hresponse = (HttpServletResponse)response; String LoginUser = (String)hrequest.getSession().getAttribute("LoginUser"); //告诉服务器已经处理完毕 chain.doFilter(request, response); } @Override public void init(FilterConfig config) throws ServletException { this.config=config; } }