? StringConverter
- ????????:
Converter
Converter
implementation that converts an incoming
object into a java.lang.String
object.
Note that ConvertUtils really is designed to do string->object conversions, and offers very little support for object->string conversions. The ConvertUtils/ConvertUtilsBean methods only select a converter to apply based upon the target type being converted to, and generally assume that the input is a string (by calling its toString method if needed).
This class is therefore just a dummy converter that converts its input into a string by calling the input object's toString method and returning that value.
It is possible to replace this converter with something that has a big if/else statement that selects behaviour based on the real type of the object being converted (or possibly has a map of converters, and looks them up based on the class of the input object). However this is not part of the existing ConvertUtils framework.
- ???????:
- 1.3
- ??:
- $Id$
-
?????
????????Construct a java.lang.String Converter that throws aConversionException
if an error occurs.StringConverter
(Object defaultValue) Construct a java.lang.String Converter that returns a default value if an error occurs. -
????
??????????protected <T> T
convertToType
(Class<T> type, Object value) Convert the specified input object into an output object of the specified type.protected Class<?>
Return the default type thisConverter
handles.??????? org.apache.commons.beanutils.converters.AbstractConverter
conversionException, convert, convertArray, convertToString, getDefault, handleError, handleMissing, isUseDefault, setDefaultValue, toString
-
???????
-
StringConverter
public StringConverter()Construct a java.lang.String Converter that throws aConversionException
if an error occurs. -
StringConverter
Construct a java.lang.String Converter that returns a default value if an error occurs.- ??:
defaultValue
- The default value to be returned if the value to be converted is missing or an error occurs converting the value.
-
-
??????
-
getDefaultType
Return the default type thisConverter
handles.- ???:
getDefaultType
???AbstractConverter
- ??:
- The default type this
Converter
handles. - ???????:
- 1.8.0
-
convertToType
Convert the specified input object into an output object of the specified type.- ???:
convertToType
???AbstractConverter
- ????:
T
- Target type of the conversion.- ??:
type
- Data type to which this value should be converted.value
- The input value to be converted.- ??:
- The converted value.
- ??:
Throwable
- if an error occurs converting to the specified type- ???????:
- 1.8.0
-