一、servlet过滤器
@WebServlet("/demo01.do")
public class Demo01Servlet extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("hello");
request.getRequestDispatcher("cc.html").forward(request,response);
}
}@WebFilter("/demo01.do")
public class Demo01Filter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
System.out.println("helloA1");
//放行
filterChain.doFilter(servletRequest,servletResponse);
System.out.println("helloA2");
}
@Override
public void destroy() {
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>hello</h1>
</body>
</html>
?
