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Accessing Static members using T() Operator in Spring configuration with Example
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Below is an example of "Accessing Static members using T() Operator in Spring configuration with Example"
Step.1 Start a Java Project with required jars 
  1. Open Eclipse
  2. Click on menu New -> Others
  3. In wizards type "Java Project" and Select "Java Project"
  4. Click Next
  5. Enter project name as "SpELTOperatorExample", then click Next
  6. Goto Libraries tab, then click on Add External JARs, then select Spring's 21 Framework Jars and commons-logging-1.1.jar.
  7. Click Finish.
Step.2 Project Explorer Preview 
RunMyProgram.java
package com.springexample;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class RunMyProgram {
	public static void main(String[] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
			DBConnector dbConnector = (DBConnector) context.getBean("dbConnector");
			System.out.println("More Details0.!");
			System.out.println(dbConnector.getDetails());
	}
}
DBConnector.java
package com.springexample;

public class DBConnector {
	private String details;
	
	public DBConnector(String dbname,String username,String password){
		System.out.println(dbname+" is connected! Using username:"+username+";password:"+password);
	}

	public String getDetails() {
		return details;
	}
	public void setDetails(String details) {
		this.details = details;
	}
}
DBInfo.java
package com.springexample;

public class DBInfo {
	public static final String DBNAME = "my_database";
	public static final String USERNAME = "root";
	public static final String PASSWORD = "security@202";
	
	public static String details(){
		return DBNAME+" : "+USERNAME+" : "+PASSWORD;
	}
}
beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

	<bean id="dbConnector" class="com.springexample.DBConnector">
		<constructor-arg value="#{T(com.springexample.DBInfo).DBNAME}" />
		<constructor-arg value="#{T(com.springexample.DBInfo).USERNAME}" />
		<constructor-arg value="#{T(com.springexample.DBInfo).PASSWORD}" />
		
		<property name="details" value="#{T(com.springexample.DBInfo).details()}" />
	</bean>
	
</beans>
Output 
my_database is connected! Using username:root;password:security@202
More Details0.!
my_database : root : security@202
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SpELTOperatorExample

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