Package org.springframework.format.annotation

Annotation Interface NumberFormat

@Documented @Retention(RUNTIME) @Target({METHOD,FIELD,PARAMETER,ANNOTATION_TYPE}) public @interface NumberFormat
Declares that a field or method parameter should be formatted as a number.

Supports formatting by style or custom pattern string. Can be applied to any JDK Number type such as Double and Long.

For style-based formatting, set the style() attribute to be the desired NumberFormat.Style. For custom formatting, set the pattern() attribute to be the number pattern, such as #, ###.##.

Each attribute is mutually exclusive, so only set one attribute per annotation instance (the one most convenient one for your formatting needs). When the pattern() attribute is specified, it takes precedence over the style() attribute. When no annotation attributes are specified, the default format applied is style-based for either number of currency, depending on the annotated field or method parameter type.

Since:
3.0
Author:
Keith Donald, Juergen Hoeller
See Also:

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static enum 
    NumberFormat.Style
    Common number format styles.

  • Optional Element Summary

    Optional Elements
    Modifier and Type
    Optional Element
    Description
    String
    pattern
    The custom pattern to use to format the field.
    NumberFormat.Style
    style
    The style pattern to use to format the field.

  • Element Details

    • style

      NumberFormat.Style style
      The style pattern to use to format the field.

      Defaults to NumberFormat.Style.DEFAULT for general-purpose number formatting for most annotated types, except for money types which default to currency formatting. Set this attribute when you wish to format your field in accordance with a common style other than the default style.

      Default:
      DEFAULT

    • pattern

      String pattern
      The custom pattern to use to format the field.

      Defaults to empty String, indicating no custom pattern String has been specified. Set this attribute when you wish to format your field in accordance with a custom number pattern not represented by a style.

      Default:
      ""