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Spring numberformatting with registercustomereditor on list of numbers
NumberFormat numberFormat = getNumberFormat(0, 0, 2);
PropertyEditor propertyEditor =
    new CustomNumberEditor(Double.class, numberFormat, true);
binder.registerCustomEditor(Double.class, "myDoubleField", propertyEditor);

public myController(PropertyEditorRegistrar customPropertyEditorRegistrar) {
    this.customPropertyEditorRegistrar = customPropertyEditorRegistrar;
}

@Override
protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder)   throws Exception {
    customPropertyEditorRegistrar.registerCustomEditors(binder);
}

public final class CustomPropertyEditorRegistrar implements PropertyEditorRegistrar {
    // Double
    PropertyEditor doubleEditor = getLocaleBasedNumberEditor(Double.class, true);
    registry.registerCustomEditor(double.class, doubleEditor);
    registry.registerCustomEditor(Double.class, doubleEditor);
}

binder.registerCustomEditor(Double.class, defaultEditor);
binder.registerCustomEditor(Double.class, "field1", specificEditor1);
binder.registerCustomEditor(Double.class, "field2", specificEditor2);

public class ListOfTimes {
   private List<TimeStoredInSecondsSinceMidnight> times;
   public static class TimeStoredInSecondsSinceMidnight {
      private Integer id;
      private Integer currentTime;
      ...
   }
   ...
}

<form:input id="time" path="times[${count.index}].currentTime" size="5"/>
<form:input id="recordId" path="times[${count.index}].id" size="5"/>

binder.registerCustomEditor(Integer.class, propertyEditor);

binder.registerCustomEditor(Integer.class, "currentTime", propertyEditor);

binder.registerCustomEditor(Integer.class, "times.currentTime", propertyEditor);