Java URL inputstream caching

I have a web application in which the header is displayed by hitting a URL. Since the header content doesnt change always i wanted to cache the results of the URL inputstream and refresh it for every 60 mins. The code of my header.jsp is :

    <%    
    URL url = new URL(strHeaderURL);
    isProxyEnabled = UCMUtility.getProperty("globalheaderproxyenabled");
     System.out.println("isProxyEnabled "+isProxyEnabled);

     System.out.println("condition "+isProxyEnabled.equals("Y"));
     if(isProxyEnabled.equals("Y")){
         System.out.println("inside proxy Yes");

         proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(UCMUtility.getProperty("globalheaderproxy"), Integer
                    .parseInt(UCMUtility.getProperty("globalheaderport"))));
         connection = url.openConnection(proxy);
     }
     else{
         System.out.println("inside proxy No");

         connection = url.openConnection();
     }
     connection.setDoInput(true);
     //connection.setReadTimeout(1000);
     //connection.setConnectTimeout(1000);
     InputStream inStream = connection.getInputStream();  
     input = new BufferedReader(new InputStreamReader(inStream));
     strContent = new StringWriter();  
     while ((strLine = input.readLine()) != null) {     
         strContent.write( strLine+"\n" );   
     }
              out.println(strContent.toString());
         %>

I include this header.jsp in all other jsp's.... Now I wanted to cahce the result of this jsp and refresh it for every 60 minutes. How can I do this? Can anyone guide me please. I searched a lot in net but could not find anything which I can understand :( Someone pls help me ..