JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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ClassNotFoundException: org.springframework.web.context.ContextLoaderListener


If you ever want to access the Servlet context during startup of your web application spring provides a ContextLoaderListener, that can easily be plugged into web.xml

Some of the most common use cases of ContextLoaderListener are:

1) During startup of the web application, if I want to load some static or configuration data from database and keep in the memory.
2) During startup and before destroy of my web application, If I want to get notify.
3) If I want to have a programatic configuration of spring, instead of from static context file.

You must configure the listner in your web.xml as shown below:

	<listener>
		<listener-class>
        	org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>

And make sure that you have included spring-web.jar dependency in your pom.xml file as shown below:

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>3.2.0.RELEASE</version>
		</dependency>

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Knowledge Centre
Procedural Vs Object-oriented Programs
In procedural program, programming logic follows certain procedures and the instructions are executed one after another. In OOP program, unit of program is object, which is nothing but combination of data and code.

In procedural program, data is exposed to the whole program whereas in OOPs program, it is accessible with in the object and which in turn assures the security of the code.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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