Mysql和java类型对应参照

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.BooleanBIT( > 1) (new in MySQL-5.0)BITbyte[]TINYINTTINYINTjava.lang.Boolean if the configuration propertytinyInt1isBit is set totrue (the default) and the storage size is 1, orjava.lang.Integer if 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 UNSIGNEDjava.lang.Long (C/J 3.1 and earlier), orjava.lang.Integer for C/J 5.0 and laterINT,INTEGER[(M)] [UNSIGNED]INTEGER [UNSIGNED]java.lang.Integer, if UNSIGNEDjava.lang.LongBIGINT[(M)] [UNSIGNED]BIGINT [UNSIGNED]java.lang.Long, if UNSIGNEDjava.math.BigIntegerFLOAT[(M,D)]FLOATjava.lang.FloatDOUBLE[(M,B)]DOUBLEjava.lang.DoubleDECIMAL[(M[,D])]DECIMALjava.math.BigDecimalDATEDATEjava.sql.DateDATETIMEDATETIMEjava.sql.TimestampTIMESTAMP[(M)]TIMESTAMPjava.sql.TimestampTIMETIMEjava.sql.TimeYEAR[(2|4)]YEARIf yearIsDateType configuration property is set to false, then the returned object type isjava.sql.Short. If set to true (the default) then an object of typejava.sql.Date (with the date set to January 1st, at midnight).CHAR(M)CHARjava.lang.String (unless the character set for the column isBINARY, then byte[] is returned.VARCHAR(M) [BINARY]VARCHARjava.lang.String (unless the character set for the column isBINARY, then byte[] is returned.BINARY(M)BINARYbyte[]VARBINARY(M)VARBINARYbyte[]TINYBLOBTINYBLOBbyte[]TINYTEXTVARCHARjava.lang.StringBLOBBLOBbyte[]TEXTVARCHARjava.lang.StringMEDIUMBLOBMEDIUMBLOBbyte[]MEDIUMTEXTVARCHARjava.lang.StringLONGBLOBLONGBLOBbyte[]LONGTEXTVARCHARjava.lang.StringENUM('value1','value2',...)CHARjava.lang.StringSET('value1','value2',...)CHARjava.lang.String