程序包 cn.taketoday.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.

从以下版本开始:

4.0

作者:

Keith Donald, Juergen Hoeller

另请参阅:

• NumberFormat

嵌套类概要

嵌套类

修饰符和类型	类	说明
static enum	NumberFormat.Style	Common number format styles.

可选元素概要

可选元素

修饰符和类型	可选元素	说明
String	pattern	The custom pattern to use to format the field.
NumberFormat.Style	style	The style pattern to use to format the field.

元素详细资料

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.

默认值:

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.

默认值:

""