jdbcType,javaType的對應關係
java.sql.Types 值 | Java 類型 | IBM DB2 | Oracle | Sybase | SQL | Informix | IBM Content Manager | |
BIGINT | java.lang.long | BIGINT | NUMBER (38, 0) | BIGINT | BIGINT | INT8 | DK_CM_BIGINT | |
BINARY | byte[] | CHAR FOR BIT DATA | RAW | BINARY | IMAGE | BYTE | DK_CM_BLOB | |
BIT | java.lang.Boolean | N/A | BIT | BIT | BIT | BIT | DK_CM_SMALLINT | |
BLOB | byte[] | BLOB | BLOB | BLOB | BLOB | BLOB | DK_CM_BLOB | |
CHAR | java.lang.String | CHAR, GRAPHIC | CHAR | CHAR | CHAR | CHAR | DK_CM_CHAR | |
CLOB | java.lang.String | CLOB, DBCLOB | CLOB | CLOB | CLOB | CLOB | DK_CM_CLOB | |
DATE | java.sql.Date | DATE | DATE | DATE | DATE | DATE | DK_CM_DATE | |
DECIMAL | java.math.BigDecimal | DECIMAL | NUMBER | DECIMAL, MONEY, SMALLMONEY | DECIMAL | DECIMAL | DK_CM_DECIMAL | |
DOUBLE | java.lang.Double | DOUBLE | DOUBLE PRECISION | DOUBLE PRECISION | DOUBLE PRECISION | DOUBLE PRECISION | DK_CM_DOUBLE | |
FLOAT | java.lang.Double | FLOAT | FLOAT | FLOAT | FLOAT | FLOAT | DK_CM_DOUBLE | |
INTEGER | java.lang.Integer | INTEGER | INTEGER | INT | INTEGER | INTEGER | DK_CM_INTEGER | |
JAVA_OBJECT | java.lang.Object | JAVA_OBJECT | JAVA_OBJECT | JAVA_OBJECT | JAVA_OBJECT | OPAQUE | N/A | |
LONGVARBINARY | byte[] | LONG VARCHAR FOR BIT DATA | LONG RAW | IMAGE | IMAGE | BYTE | DK_CM_BLOB | |
LONGVARCHAR | java.lang.String | LONG VARCHAR, LONG VARGRAPHIC | LONG | TEXT | TEXT | TEXT | DK_CM_VARCHAR(3500) | |
NUMERIC | java.math.BigDecimal | NUMERIC | NUMBER | NUMERIC | NUMERIC | NUMERIC | DK_CM_DECIMAL | |
OTHER | java.lang.Object | OTHER | OTHER | OTHER | OTHER | OTHER | N/A | |
REAL | java.lang.Float | REAL | REAL | REAL | REAL | REAL | DK_CM_DOUBLE | |
SMALLINT | java.lang.Integer | SMALLINT | SMALLINT | SMALLINT | SMALLINT | SMALLINT | DK_CM_INTEGER | |
TIME | java.sql.Time | TIME | DATE | TIME | TIME | DATETIME HOUR TO SECOND | DK_CM_TIME | |
TIMESTAMP | java.sql.Timestamp | TIMESTAMP | DATE | DATETIME, SMALLDATETIME | DATETIME | DATETIME YEAR TO FRACTION (5) | DK_CM_TIMESTAMP | |
TINYINT | java.lang.Bute | SMALLINT |
TINYINT |
TINYINT |
TINYINT | TINYINT | DK_CM_INTEGER | |
VARBINARY | byte[] | VARCHAR FOR BIT DATA | RAW | VARBINARY | IMAGE | BYTE | DK_CM_BLOB | |
VARCHAR | java.lang.String | VARCHAR, VARGRAPHIC | VARCHAR | VARCHAR | VARCHAR | VARCHAR | DK_CM_VARCHAR |
轉載圖表,根源爲考證,可以學習一下
其中javaType簡單的說,就是java所具有的數據類型,我們可以根據平時接觸到的java數據類型,就能夠知道java的數據類型,例如:java的String,Date,等等
而jdbcType,則是數據庫對應的數據類型,例如:oracle數據庫的數據類型,VARCHAR,CHAR等等
常用的oracle數據庫的java對應關係:
JDBC Type Java Type
CHAR String
VARCHAR String
LONGVARCHAR String
NUMERIC java.math.BigDecimal
DECIMAL java.math.BigDecimal
BIT boolean
BOOLEAN boolean
TINYINT byte
SMALLINT short
INTEGER INTEGER
BIGINT long
REAL float
FLOAT double
DOUBLE double
BINARY byte[]
VARBINARY byte[]
LONGVARBINARY byte[]
DATE java.sql.Date
TIME java.sql.Time
TIMESTAMP java.sql.Timestamp
CLOB Clob
BLOB Blob
ARRAY Array
DISTINCT mapping of underlying type
STRUCT Struct
REF Ref
Mybatis中什麼時候用jdbcType,javaType
關於什麼時候使用jdbcType的問題的話
舉例說明:在更新操作中,如果我們沒有特別指定數據類型的話
1、當傳入的參數name的值爲空的時候
2、如果參入的參數name的值爲空,而沒有加上jdbcType這個來限定類型的話,執行的SQL會報異常
Error querying database. Cause: org.postgresql.util.PSQLException: ERROR