Mybatis 内置 Java 类型别名与 typeHandlers

aliases

There are many built-in type aliases for common Java types. They are all case insensitive, note the special handling of primitives due to the overloaded names.

Alias	Mapped Type
_byte	byte
_long	long
_short	short
_int	int
_integer	int
_double	double
_float	float
_boolean	boolean
string	String
byte	Byte
long	Long
short	Short
int	Integer
integer	Integer
double	Double
float	Float
boolean	Boolean
date	Date
decimal	BigDecimal
bigdecimal	BigDecimal
object	Object
map	Map
hashmap	HashMap
list	List
arraylist	ArrayList
collection	Collection
iterator	Iterator

typeHandlers

Whenever MyBatis sets a parameter on a PreparedStatement or retrieves a value from a ResultSet, a TypeHandler is used to retrieve the value in a means appropriate to the Java type. The following table describes the default TypeHandlers.

NOTE If you use classes provided by JSR-310(Date and Time API), you can use the mybatis-typehandlers-jsr310.

Type Handler	Java Types	JDBC Types
BooleanTypeHandler	java.lang.Boolean, boolean	Any compatible BOOLEAN
ByteTypeHandler	java.lang.Byte, byte	Any compatible NUMERIC or BYTE
ShortTypeHandler	java.lang.Short, short	Any compatible NUMERIC or SHORT INTEGER
IntegerTypeHandler	java.lang.Integer, int	Any compatible NUMERIC or INTEGER
LongTypeHandler	java.lang.Long, long	Any compatible NUMERIC or LONG INTEGER
FloatTypeHandler	java.lang.Float, float	Any compatible NUMERIC or FLOAT
DoubleTypeHandler	java.lang.Double, double	Any compatible NUMERIC or DOUBLE
BigDecimalTypeHandler	java.math.BigDecimal	Any compatible NUMERIC or DECIMAL
StringTypeHandler	java.lang.String	CHAR, VARCHAR
ClobReaderTypeHandler	java.io.Reader	-
ClobTypeHandler	java.lang.String	CLOB, LONGVARCHAR
NStringTypeHandler	java.lang.String	NVARCHAR, NCHAR
NClobTypeHandler	java.lang.String	NCLOB
BlobInputStreamTypeHandler	java.io.InputStream	-
ByteArrayTypeHandler	byte[]	Any compatible byte stream type
BlobTypeHandler	byte[]	BLOB, LONGVARBINARY
DateTypeHandler	java.util.Date	TIMESTAMP
DateOnlyTypeHandler	java.util.Date	DATE
TimeOnlyTypeHandler	java.util.Date	TIME
SqlTimestampTypeHandler	java.sql.Timestamp	TIMESTAMP
SqlDateTypeHandler	java.sql.Date	DATE
SqlTimeTypeHandler	java.sql.Time	TIME
ObjectTypeHandler	Any	OTHER, or unspecified
EnumTypeHandler	Enumeration Type	VARCHAR any string compatible type, as the code is stored (not index).
EnumOrdinalTypeHandler	Enumeration Type	Any compatible NUMERIC or DOUBLE, as the position is stored (not the code itself).

http://www.mybatis.org/mybatis-3/configuration.html#typeAliases