jsp 获得当前url以及url参数

//获得当前url
  StringBuffer url = new StringBuffer(request.getScheme() + "://" + request.getServerName()
    + request.getRequestURI());

//判断当前url是否有参数
  if(request.getQueryString()!=null && !"".equals(request.getQueryString())){
         url.append("?" + request.getQueryString());
  }

 

 

System.out.println("rotocol: " + request.getProtocol()); 
System.out.println("Scheme: " + request.getScheme()); 
System.out.println("Server Name: " + request.getServerName() ); 
System.out.println("Server Port: " + request.getServerPort()); 
System.out.println("rotocol: " + request.getProtocol()); 
System.out.println("Server Info: " + getServletConfig().getServletContext().getServerInfo()); 
System.out.println("Remote Addr: " + request.getRemoteAddr()); 
System.out.println("Remote Host: " + request.getRemoteHost()); 
System.out.println("Character Encoding: " + request.getCharacterEncoding()); 
System.out.println("Content Length: " + request.getContentLength()); 
System.out.println("Content Type: "+ request.getContentType()); 
System.out.println("Auth Type: " + request.getAuthType()); 
System.out.println("HTTP Method: " + request.getMethod()); 
System.out.println("path Info: " + request.getPathInfo()); 
System.out.println("path Trans: " + request.getPathTranslated()); 
System.out.println("Query String: " + request.getQueryString()); 
System.out.println("Remote User: " + request.getRemoteUser()); 
System.out.println("Session Id: " + request.getRequestedSessionId()); 
System.out.println("Request URI: " + request.getRequestURI()); 
System.out.println("Servlet Path: " + request.getServletPath()); 
System.out.println("Accept: " + request.getHeader("Accept")); 
System.out.println("Host: " + request.getHeader("Host")); 
System.out.println("Referer : " + request.getHeader("Referer")); 
System.out.println("Accept-Language : " + request.getHeader("Accept-Language")); 
System.out.println("Accept-Encoding : " + request.getHeader("Accept-Encoding")); 
System.out.println("User-Agent : " + request.getHeader("User-Agent")); 
System.out.println("Connection : " + request.getHeader("Connection")); 
System.out.println("Cookie : " + request.getHeader("Cookie")); 
System.out.println("Created : " + session.getCreationTime()); 
System.out.println("LastAccessed : " + session.getLastAccessedTime());

 //获得当前url

StringBuffer url = new StringBuffer("http://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath()+request.getServletPath());

//判断当前url是否有参数

 if(request.getQueryString()!=null && !"".equals(request.getQueryString())){

        url.append("?" + request.getQueryString());

 }