java.sql.Blob是接口而不是类，因此不能存在构造函数.但是您可以实例化实现类SerialBlob，该类允许您从字节数组构造blob.

java.sql.Blob is an interface and not a class, thus no constructor can exist. But you can instantiate the implementing class SerialBlob which allows you to construct a blob from a byte array.