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). |
本来转载：http://blog.csdn.net/wz5891/article/details/52730735