The property type of the Java entity class corresponds to the table __c# of the Database table field type

There are many different types of data in Java and data types in SQL, which need to be carefully differentiated, otherwise it is easy to create inexplicable errors in development.

Java Data types	Hibernate data type	Standard SQL data type (PS: May vary for different db)
BYTE, Java.lang.Byte	Byte	TINYINT
Short, Java.lang.Short	Short	SMALLINT
int, Java.lang.Integer	Integer	Ingeger
Long, Java.lang.Long	Long	BIGINT
float, java.lang.Float	Float	FLOAT
Double, java.lang.Double	Double	DOUBLE
Java.math.BigDecimal	Big_decimal	NUMERIC
Char, Java.lang.Character	Character	CHAR (1)
Boolean, Java.lang.Boolean	Boolean	BIT
Java.lang.String	String	VARCHAR
Boolean, Java.lang.Boolean	Yes_no	CHAR (1) (' Y ' or ' N ')
Boolean, Java.lang.Boolean	True_false	CHAR (1) (' Y ' or ' N ')
Java.util.Date, Java.sql.Date	Date	DATE
Java.util.Date, Java.sql.Time	Time	Time
Java.util.Date, Java.sql.Timestamp	Timestamp	TIMESTAMP
Java.util.Calendar	Calendar	TIMESTAMP
Java.util.Calendar	Calendar_date	DATE
Byte[]	Binary	VARBINARY, BLOB
Java.lang.String	Text	Clob
Java.io.Serializable	Serializable	VARBINARY, BLOB
Java.sql.Clob	Clob	Clob
Java.sql.Blob	Blob	Blob
Java.lang.Class	Class	VARCHAR
Java.util.Locale	Locale	VARCHAR
Java.util.TimeZone	TimeZone	VARCHAR
Java.util.Currency	Currency	VARCHAR

Turn from: https://blog.csdn.net/lyhjava/article/details/50562786?locationNum=15