Search Engine Optimization Technique

For SEO, there are few things to note.

1. Meaningful title
   "Production name | Description"


2. Use of meta tag
   META DESCRIPTION, META KEYWORD


3. Use of canonical link
   http://googlewebmastercentral.blogspot.com/2009/02/specify-your-canonical.html


4. Use of SiteMap
   http://code.google.com/p/googlessitemapgenerator/
   http://www.sitemaps.org/protocol.php


5. Use alt text

More information:

1. http://static.googleusercontent.com/external_content/untrusted_dlcp/www.google.com/zh-TW//webmasters/docs/search-engine-optimization-starter-guide.pdf


2. http://www.seomoz.org/beginners-guide-to-seo

Reading and saving UTF8 text file in Java

To read and save text file in Java, we need to add the "UTF-8" parameter in the Stream Reader.


File file = new File("1.txt");
BufferedReader reader = null;
try {
   reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));
   String text = reader.readLine();
   String s1="\u6df1\u6c34\u57d7";
   String s2="深水埗";

   OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream("2.txt"),"UTF-8");
   out.write(text+s1+s2);
   out.flush();
   out.close();

} catch (Exception e) {
   e.printStackTrace();
}


Capture standard output (stdout) in console command running at VBS

We can use WScript.Shell.Exec( ) and WScript.Shell.StdOut.ReadLine( ) to perform the task:


Set objShell = WScript.CreateObject("WScript.Shell")
Set objExecObject = objShell.Exec("cmd /c dir")
strText=""
Do While Not objExecObject.StdOut.AtEndOfStream
strText = strText & objExecObject.StdOut.ReadLine() & chr(13)
Loop
Wscript.Echo strText


Using X-Forward-For Header

Say if you have a web server on top of your application server, you can use "x-Forward-For" HTTP header in the application server to get the real IP of the client.

Note: Remote host only returns the IP of the web server instead.

Analyze JVM memory heap

To analyze how a Java web application is performed in terms of its memory usage, one can use Eclipse Memory Analyzer to do it.

Ref: Eclipse MAT

InetAddress.getByName( ) cached result

java.net.InetAddress.getByName( ) will cached the result, even when the host name IP is changed. To fix this, issue the following option to Java VM:

-Dsun.net.inetaddr.ttl=0

It sets the timeout of the DNS cache to zero.

Using netsh for IP config import/export

2 lines only:

netsh -c interface dump > filename

netsh -f filename

Ref: http://www.alibutt.com/?p=250

Some more about netsh to read at http://www.builderau.com.au/program/windows/print.htm?TYPE=story&AT=339272916-339024644t-320000994c

What is COPM?

COPM = Computer Operation Procedures Manual

How to check physical memory

1. winmsd.exe

2. pstat.exe (from resource kit)

3. memory.exe (http://www.savilltech.com/download/memory.zip)

From windowsitpro.com

Enable Java assertion

Just a soft reminder in case I want to use Java assertion. Given a class Cls:

> java -ea:Cls Cls

The comment will execute Cls which assertion enabled.