当MyBatis insert或者update语句的变量含有空值(null值) 时，需要指定JdbcType 否则：java.sql.SQLException: Invalid column type: 1111 无效的列类型: 1111
解决方法：给参数加上 jdbcType 可解决(注意大小写)

insert into xxx(a,b) values(
	#{a,jdbcType=VARCHAR}, #{b,jdbcType=DATE}
)

update xxx set a=#{a,jdbcType=VARCHAR} where id=#{id}

注意：${all}时不适用jdbcType
a.xx like '%${all}%' 此时不能加jdbcType=VARCHAR

jdbcType类型

ARRAY(Types.ARRAY),
BIT(Types.BIT),
TINYINT(Types.TINYINT),
SMALLINT(Types.SMALLINT),
INTEGER(Types.INTEGER),
BIGINT(Types.BIGINT),
FLOAT(Types.FLOAT),
REAL(Types.REAL),
DOUBLE(Types.DOUBLE),
NUMERIC(Types.NUMERIC),
DECIMAL(Types.DECIMAL),
CHAR(Types.CHAR),
VARCHAR(Types.VARCHAR),
LONGVARCHAR(Types.LONGVARCHAR),
DATE(Types.DATE),
TIME(Types.TIME),
TIMESTAMP(Types.TIMESTAMP),
BINARY(Types.BINARY),
VARBINARY(Types.VARBINARY),
LONGVARBINARY(Types.LONGVARBINARY),
NULL(Types.NULL),
OTHER(Types.OTHER),
BLOB(Types.BLOB),
CLOB(Types.CLOB),
BOOLEAN(Types.BOOLEAN),
CURSOR(-10), // Oracle
UNDEFINED(Integer.MIN_VALUE + 1000),
NVARCHAR(-9), // JDK6
NCHAR(-15), // JDK6
NCLOB(2011), // JDK6
STRUCT(Types.STRUCT);