java filter

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // TODO Auto-generated method stub
        // place your code here
       
        //System.out.println("testfilter");
        System.out.println(request.getCharacterEncoding());
        System.out.println(request.getContentLength());
        System.out.println(request.getContentType());
        System.out.println(request.getLocalAddr());
        System.out.println(request.getLocalName());
        System.out.println(request.getLocalPort());
        System.out.println(request.getProtocol());
        System.out.println(request.getRemoteAddr());
        System.out.println(request.getRemoteHost());
        System.out.println(request.getRemotePort());
        System.out.println(request.getScheme());
        System.out.println(request.getServerName());
        System.out.println(request.getServerPort());
        System.out.println(request.getAsyncContext());
        System.out.println(request.getAttributeNames());
        System.out.println(request.getDispatcherType());
        System.out.println(request.getInputStream());
        System.out.println(request.getLocale());
        System.out.println(request.getLocales());
        System.out.println(request.getParameterMap());
        System.out.println(request.getParameterNames());
        System.out.println(request.getServletContext());
       
        // pass the request along the filter chain
        chain.doFilter(request, response);
    }

----

null
-1
null
140.1.1.1
140.1.1.1
80
HTTP/1.1
111.1.1.1
111.1.1.1
53313
http
140.1.1.1
80
null
java.util.Collections$2@21caf0b6
REQUEST
org.apache.catalina.connector.CoyoteInputStream@a2c31a1
zh_TW
java.util.Collections$2@12814e0f
{}
java.util.Collections$2@672bc446
org.apache.catalina.core.ApplicationContextFacade@6a630494