Struts 2 Action Chaining example
In Struts 2, sometimes you may want to process another action when one action completes. For example on successfully submitting a form you want to render output from other action. This is called Action...
How to Redirect Standard Output/Error in Java
System.out and System.err stream objects are mapped to “standard” output and error stream respectively. By default, Java display standard output/error on display console. Thus, when we print a statement using System.out: It prints the...
Read / Write Excel file in Java using Apache POI
Apache POI is a powerful Java library to work with different Microsoft Office file formats such as Excel, Power point, Visio, MS Word etc. The name POI was originally an acronym for Poor Obfuscation Implementation,...
How to update JSTL Locale dynamically
When you use JSTL format tag <fmt:formatDate> and <fmt:formatNumber>, JSTL automatically takes care of locale resolution. Depending on the browser’s locale setting JSTL will display the date and numbers. You may want to override this default behavior....
Spring 3 MVC Interceptor tutorial with example
Spring MVC provides a powerful mechanism to intercept an http request. Similar to Servlet Filter concept, Spring MVC provides a way to define special classes called Interceptors that gets called before and after a request...
Eclipse: Ignore “not declare static final serialVersionUID” warning
Whenever you write a Java class in Eclipse which implements java.io.Serializable interface, you’ll get this warning: The serializable class XXXX does not declare a static final serialVersionUID field of type long Why do we...
Solve:Errors/BindingResult argument declared without preceding model attribute
Sometimes Spring MVC will amaze you with totally unexpected exceptions. You have no idea why that is coming. For instance, recently I wrote a small piece of Spring MVC Controller code, one like below:...
Spring MVC Multiple File Upload example
In this simple tutorial we will see how to implement multiple file upload in a Spring 3 MVC based application. The requirement is simple. We have a form which displays file input component. User...
Android Preferences Activity example
Android application often needs settings that allow users to modify preferences in app. Android provides a powerful framework to manage user preferences. It allows us to define the way we want preferrences and it...
Java: How to Load CSV file into Database
Loading CSV file into Database can be cumbersome task if your Database provider does not offer an out of box feature for this. Most of the time you’ll spend up in creating valid insert...