import org.displaytag.decorator.DisplaytagColumnDecorator; //导入依赖的package包/类
@Override
public DisplaytagColumnDecorator loadColumnDecorator(PageContext pageContext, String name) throws DecoratorInstantiationException 
{
	if (StringUtils.isBlank(name)) return null;
	  
	ApplicationContext appContext = WebApplicationContextUtils
		.getRequiredWebApplicationContext(pageContext.getServletContext());
	
	Object decorator = null;
	
	try
	{
		decorator =  appContext.getBean(name, DisplaytagColumnDecorator.class);
	}
	catch(NoSuchBeanDefinitionException e)
	{
		log.debug("Decorator " + name + " not found in Spring ApplicationContext. Using DefaultDecoratorFactory.loadTableDecorator. ");
	}
	
	if (decorator != null && decorator instanceof DisplaytagColumnDecorator) return (DisplaytagColumnDecorator) decorator;
	
	return super.loadColumnDecorator(pageContext, name);		
}
 

import org.displaytag.decorator.DisplaytagColumnDecorator; //导入依赖的package包/类
/**
 * Gets the value, after calling the table / column decorator is requested.
 * @param decorated boolean
 * @return Object will never be null if ShowNulls has been set to false
 * @throws ObjectLookupException for errors in bean property lookup
 * @throws DecoratorException if a column decorator is used and an exception is thrown during value decoration
 */
public Object getValue(boolean decorated) throws ObjectLookupException, DecoratorException
{

    Object object = null;

    // a static value has been set?
    if (this.cell.getStaticValue() != null)
    {
        object = this.cell.getStaticValue();
    }
    else if (this.header.getBeanPropertyName() != null)
    {

        // if a decorator has been set, and if decorator has a getter for the requested property only, check
        // decorator
        if (decorated
            && this.row.getParentTable().getTableDecorator() != null
            && this.row.getParentTable().getTableDecorator().hasGetterFor(this.header.getBeanPropertyName()))
        {

            object = LookupUtil.getBeanProperty(
                this.row.getParentTable().getTableDecorator(),
                this.header.getBeanPropertyName());
        }
        else
        {
            // else check underlining object
            object = LookupUtil.getBeanProperty(this.row.getObject(), this.header.getBeanPropertyName());
        }
    }

    DisplaytagColumnDecorator[] decorators = this.header.getColumnDecorators();
    if (decorated)
    {
        for (int j = 0; j < decorators.length; j++)
        {
            object = decorators[j].decorate(object, row.getParentTable().getPageContext(), row
                .getParentTable()
                .getMedia());
        }
    }

    if (object == null || "null".equals(object)) //$NON-NLS-1$
    {
        if (!this.header.getShowNulls())
        {
            object = TagConstants.EMPTY_STRING;
        }
    }

    return object;
}
 

import org.displaytag.decorator.DisplaytagColumnDecorator; //导入依赖的package包/类
/**
 * Returns the columnDecorator object for this column.
 * @return DisplaytagColumnDecorator
 */
public DisplaytagColumnDecorator[] getColumnDecorators()
{
    return this.columnDecorators != null ? this.columnDecorators : new DisplaytagColumnDecorator[0];
}
 

import org.displaytag.decorator.DisplaytagColumnDecorator; //导入依赖的package包/类
/**
 * Sets the columnDecorator object for this column.
 * @param decorator - the DisplaytagColumnDecorator
 */
public void setColumnDecorators(DisplaytagColumnDecorator[] decorator)
{
    this.columnDecorators = decorator;
}