【免费】留言本程序中的过滤器资源-CSDN文库

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java：4个

中文编码过滤器

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过滤器

AuthorizationFilter.java 2KB

NoteFilter.java 2KB

NoteServlet.java 2KB

CharacterEncodingFilter.java 1KB

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 AuthorizationFilter implements Filter { private FilterConfig filterConfig; //Handle the passed-in FilterConfig public void init(FilterConfig filterConfig) throws ServletException { this.filterConfig = filterConfig; } //Process the request/response pair public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) { System.out.println("In AuthorizationFilter."); try { HttpServletRequest httpRequest = (HttpServletRequest) request; HttpServletResponse httpResponse = (HttpServletResponse) response; String hostAddress = request.getRemoteAddr(); if (hostAddress.startsWith("127.0.0.1")) { filterChain.doFilter(request, response); } else { String errorPage = filterConfig.getInitParameter("errorPage"); httpRequest.getRequestDispatcher(errorPage).forward(request, response); // response.setContentType("text/html"); // PrintWriter out = response.getWriter(); // out // .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); // out.println("<HTML>"); // out.println(" <HEAD><TITLE>Hello Servlet</TITLE></HEAD>"); // out.println(" <BODY>"); // out.print("Error Authorization! "); // out.println(" </BODY>"); // out.println("</HTML>"); // out.flush(); // out.close(); } } catch (ServletException sx) { filterConfig.getServletContext().log(sx.getMessage()); } catch (IOException iox) { filterConfig.getServletContext().log(iox.getMessage()); } } //Clean up resources public void destroy() { this.filterConfig = null; } }