程序包 cn.taketoday.expression.spel.support

类 StandardTypeConverter

java.lang.Object

cn.taketoday.expression.spel.support.StandardTypeConverter

所有已实现的接口:

TypeConverter

public class StandardTypeConverter
extends Object
implements TypeConverter

Default implementation of the TypeConverter interface, delegating to a core ConversionService.

从以下版本开始:

4.0

作者:

Juergen Hoeller, Andy Clement

另请参阅:

• ConversionService

构造器概要

构造器

构造器	说明
StandardTypeConverter()	Create a StandardTypeConverter for the default ConversionService.
StandardTypeConverter(ConversionService conversionService)	Create a StandardTypeConverter for the given ConversionService.
StandardTypeConverter(Supplier<ConversionService> conversionService)	Create a StandardTypeConverter for the given ConversionService.

方法概要

修饰符和类型	方法	说明
boolean	canConvert(TypeDescriptor sourceType, TypeDescriptor targetType)	Return true if the type converter can convert the specified type to the desired target type.
Object	convertValue(Object value, TypeDescriptor sourceType, TypeDescriptor targetType)	Convert (or coerce) a value from one type to another, for example from a boolean to a String.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

StandardTypeConverter

public StandardTypeConverter()

Create a StandardTypeConverter for the default ConversionService.

另请参阅:

• DefaultConversionService.getSharedInstance()

StandardTypeConverter

public StandardTypeConverter(ConversionService conversionService)

Create a StandardTypeConverter for the given ConversionService.

参数:

conversionService - the ConversionService to delegate to

StandardTypeConverter

public StandardTypeConverter(Supplier<ConversionService> conversionService)

Create a StandardTypeConverter for the given ConversionService.

参数:

conversionService - a Supplier for the ConversionService to delegate to

方法详细资料

canConvert

public boolean canConvert(@Nullable
 TypeDescriptor sourceType,
 TypeDescriptor targetType)

从接口复制的说明: TypeConverter

Return true if the type converter can convert the specified type to the desired target type.

指定者:

canConvert 在接口中 TypeConverter

参数:

sourceType - a type descriptor that describes the source type

targetType - a type descriptor that describes the requested result type

返回:

true if that conversion can be performed

convertValue

@Nullable
public Object convertValue(@Nullable
 Object value,
 @Nullable
 TypeDescriptor sourceType,
 TypeDescriptor targetType)

从接口复制的说明: TypeConverter

Convert (or coerce) a value from one type to another, for example from a boolean to a String.

The TypeDescriptor parameters enable support for typed collections: A caller may prefer a List<Integer>, for example, rather than simply any List.

指定者:

convertValue 在接口中 TypeConverter

参数:

value - the value to be converted

sourceType - a type descriptor that supplies extra information about the source object

targetType - a type descriptor that supplies extra information about the requested result type

返回:

the converted value