Spring PropertyEditor for JSON map and array properties

I'm a big fan of Spring but found that it does not support map and list expressions in a property file to be substituted when using a PropertyPlaceholder. So I rolled my own PropertyEditor and can now express a map using JSON in my properties file e.g.:

myMapProperty ={"en-AU": "SKY", "ms": "SKY"}

Here's the property editor (depends on json-lib):

package <packagename>;
import java.beans.PropertyEditorSupport; 
import net.sf.json.JSON;
import net.sf.json.JSONSerializer;
/**
 * Converts JSON expressions to Java arrays or maps and vice versa.
 *
 * @author huntc
 *
 */
public class JSONPropertyEditor extends PropertyEditorSupport {
@Override
  public String getAsText() {
    Object object = getValue();
    JSON jsonObject = JSONSerializer.toJSON(object);
    return jsonObject.toString();
  }
@Override
  public void setAsText(String text) {
    JSON json = JSONSerializer.toJSON(text);
    setValue(json);
  }
}

and here's what you must declare in your spring configuration xml:

<bean id="customEditorConfigurer"
  class="org.springframework.beans.factory.config.CustomEditorConfigurer">
  <property name="customEditors">
    <map>
      <entry key="java.util.Map">
        <bean class="<packagename>.JSONPropertyEditor" />
      </entry>
    </map>
  </property>
</bean>

The above indicates that for any required substitution of a map, use my property editor e.g.:

<bean id="someBeanWithAMapProperty"
  class="someClass">
  <property name="someMapProperty"
    value="${myMapProperty}" />
</bean>