jdbc对SqlServer以及java数据类型映射表（很有用的）

bigint

BIGINT

long

timestamp

binary

BINARY

byte[]

bit

BIT

boolean

char

CHAR

String

decimal

money

smallmoney

DECIMAL

java.math.BigDecimal

float

DOUBLE

double

int

INTEGER

int

image

varbinary(max)

LONGVARBINARY

byte[]

varchar(max)

text

LONGVARCHAR

String

nchar

CHAR

NCHAR (Java SE 6.0)

String

nvarchar

VARCHAR

NVARCHAR (Java SE 6.0)

String

nvarchar(max)

ntext

LONGVARCHAR

LONGNVARCHAR (Java SE 6.0)

String

numeric

NUMERIC

java.math.BigDecimal

real

REAL

float

smallint

SMALLINT

short

datetime

smalldatetime

TIMESTAMP

java.sql.Timestamp

varbinary

udt

VARBINARY

byte[]

varchar

VARCHAR

String

tinyint

TINYINT

short

uniqueidentifier

CHAR

String

xml

LONGVARCHAR

SQLXML (Java SE 6.0)

String

SQLXML

time

TIME (1)

java.sql.Time (1)

date

DATE

java.sql.Date

datetime2

TIMESTAMP

java.sql.Timestamp

datetimeoffset (2)

microsoft.sql.Types.DATETIMEOFFSET

microsoft.sql.DateTimeOffset