public static String evalString(String propertyName, String propertyValue, Tag tag, PageContext pageContext) throws JspException{
    	
    	return (String) ExpressionEvaluatorManager.evaluate(propertyName,
    			propertyValue, String.class, tag, pageContext);
    }
public static String evalString ( String propertyName , String propertyValue , Tag tag , PageContext pageContext ) throws JspException { return ( String ) ExpressionEvaluatorManager . evaluate ( propertyName , propertyValue , String . class , tag , pageContext ) ; }
Evaluate the string EL expression passed as parameter
@param propertyName the property name
@param propertyValue the property value
@param tag the tag
@param pageContext the page context
@return the value corresponding to the EL expression passed as parameter
@throws JspException if an exception occurs