@Column("content")
private Blob content;

org.nutz.castor.FailToCastObjectException: Fail to cast from <java.lang.Byte> to <com.mysql.jdbc.Blob> for {91} because:

BorningException:Fail to born 'com.mysql.jdbc.Blob'

在查询包含blob属性的对象时报此异常，如何解决，求大神指点。