Web Debugger

Fiddler

XML

XStream
XStream is a simple library to serialize objects to XML and back again.

JDBC

Get disconnected with CachedRowSet

Java cuncurrency

Concurrency

Design Pattern

Core J2EE Patterns

Computer Science

Recursion 
Recursion is the process of repeating items in a self-similar way


For example 7! equals 7*6*5*4*3*2*1 


public int factorial(int n)

{
  if (n <= 1) 
    return 1;
  else
    return n * factorial(n-1);
}

Tail Recursion

Tail call Optimization

Object Oriented Designs

SOLID

S = Single Responsibility Principle
O = Opened Closed Principle 
L = Liscov Substitution Principle
I = Interface Segregation Principle
D = Dependency Inversion Principle

How I explained OOD to my wife

How to select the first/least/max row per group in SQL

How to select the first/least/max row per group in SQL

Seven Security (Mis)Configurations in Java web.xml Files

http://software-security.sans.org/blog/2010/08/11/security-misconfigurations-java-webxml-files

Extract tokens from velocity template

public class MyVariableVisitor extends BaseVisitor

{

public static final String SOURCE_VERSION_ID = "$Id$";

public Object visit(ASTReference arg0, Object arg1)

{

String name = arg0.literal();

List tokenList = (List) arg1;

tokenList.add(name);

return super.visit(arg0, arg1);

}

}

public static void main(String[] args) throws Exception

{

Properties p = new Properties();

p.setProperty("file.resource.loader.path", "D:\\");

VelocityEngine vEngine = new VelocityEngine(p);

Template template = vEngine.getTemplate("just.html");

SimpleNode simpleNode = (SimpleNode) template.getData();

MyVariableVisitor mvVisitor = new MyVariableVisitor();

List tokenList = new ArrayList();

simpleNode.jjtAccept(mvVisitor, tokenList);

for (String item : tokenList)

{

System.out.println(item);

}

}

Ref: http://permalink.gmane.org/gmane.comp.jakarta.velocity.user/14824

Spring tutorial

http://java9s.com/spring-framework/spring-framework-introduction

http://java9s.com/struts-2-mvc/struts-2-mvc-framework-introduction

Tutorials

http://tutorials.jenkov.com/

Beginners UML Tutorial

http://www.visualcase.com/tutorials/uml-tutorial.htm

OWASP AntiSamy Project

OWASP AntiSamy Project for preventing Cross Site Scripting (XSS)

http://www.owasp.org/index.php/Category:OWASP_AntiSamy_Project