男主是军阀 囚禁女主:Java数据类型和MySql数据类型对应一览

类型名称显示长度数据库类型JAVA类型JDBC类型索引(int)描述
VARCHARL+NVARCHARjava.lang.String12
CHARNCHARjava.lang.String1
BLOBL+NBLOBjava.lang.byte[]-4
TEXT65535VARCHARjava.lang.String-1
INTEGER4INTEGER UNSIGNEDjava.lang.Long4
TINYINT3TINYINT UNSIGNEDjava.lang.Integer-6
SMALLINT5SMALLINT UNSIGNEDjava.lang.Integer5
MEDIUMINT8MEDIUMINT UNSIGNEDjava.lang.Integer4
BIT1BITjava.lang.Boolean-7
BIGINT20BIGINT UNSIGNEDjava.math.BigInteger-5
FLOAT4+8FLOATjava.lang.Float7
DOUBLE22DOUBLEjava.lang.Double8
DECIMAL11DECIMALjava.math.BigDecimal3
BOOLEAN1同TINYINT
ID11PK (INTEGER UNSIGNED)java.lang.Long4
DATE10DATEjava.sql.Date91
TIME8TIMEjava.sql.Time92
DATETIME19DATETIMEjava.sql.Timestamp93
TIMESTAMP19TIMESTAMPjava.sql.Timestamp93
YEAR4YEARjava.sql.Date91
以上就是Java数据类型和MySql数据类型对应表。
对于bolb，一般用于对图片的数据库存储，原理是把图片打成二进制，然后进行的一种存储方式，在java中对应byte［］数组。
对于boolen类型，在mysql数据库中，个人认为用int类型代替较好，对bit操作不是很方便，尤其是在具有web页面开发的项目中，表示0/1，对应java类型的Integer较好。
BIT(1) (new in MySQL-5.0)BITjava.lang.Boolean
BIT( > 1) (new in MySQL-5.0)BITbyte[]
TINYINTTINYINTjava.lang.Boolean if the configuration property tinyInt1isBit is set to true (the default) and the storage size is 1, or java.lang.Integerif not.
BOOL, BOOLEANTINYINTSee TINYINT, above as these are aliases for TINYINT(1), currently.
SMALLINT[(M)] [UNSIGNED]SMALLINT [UNSIGNED]java.lang.Integer (regardless if UNSIGNED or not)
MEDIUMINT[(M)] [UNSIGNED]MEDIUMINT [UNSIGNED]java.lang.Integer, if UNSIGNED java.lang.Long (C/J 3.1 and earlier), or java.lang.Integer for C/J 5.0 and later
INT,INTEGER[(M)] [UNSIGNED]INTEGER [UNSIGNED]java.lang.Integer, if UNSIGNED java.lang.Long
BIGINT[(M)] [UNSIGNED]BIGINT [UNSIGNED]java.lang.Long, if UNSIGNED java.math.BigInteger
FLOAT[(M,D)]FLOATjava.lang.Float
DOUBLE[(M,B)]DOUBLEjava.lang.Double
DECIMAL[(M[,D])]DECIMALjava.math.BigDecimal
DATEDATEjava.sql.Date
DATETIMEDATETIMEjava.sql.Timestamp
TIMESTAMP[(M)]TIMESTAMPjava.sql.Timestamp
TIMETIMEjava.sql.Time
YEAR[(2|4)]YEARIf yearIsDateType configuration property is set to false, then the returned object type is java.sql.Short. If set to true (the default) then an object of type java.sql.Date (with the date set to January 1st, at midnight).
CHAR(M)CHARjava.lang.String (unless the character set for the column is BINARY, then byte[] is returned.
VARCHAR(M) [BINARY]VARCHARjava.lang.String (unless the character set for the column is BINARY, then byte[] is returned.
BINARY(M)BINARYbyte[]
VARBINARY(M)VARBINARYbyte[]
TINYBLOBTINYBLOBbyte[]
TINYTEXTVARCHARjava.lang.String
BLOBBLOBbyte[]
TEXTVARCHARjava.lang.String
MEDIUMBLOBMEDIUMBLOBbyte[]
MEDIUMTEXTVARCHARjava.lang.String
LONGBLOBLONGBLOBbyte[]
LONGTEXTVARCHARjava.lang.String
ENUM('value1','value2',...)CHARjava.lang.String
SET('value1','value2',...)CHARjava.lang.String
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