Java保存图片到数据库Blob格式

public class PollingDataDTO {
    private Integer pointId;
    private byte[] image;

    public Integer getPointId() {
        return pointId;
    }

    public void setPointId(Integer pointId) {
        this.pointId = pointId;
    }

    public byte[] getImage() {
        return image;
    }

    public void setImage(byte[] image) {
        this.image = image;
    }
}

// 执行代码
public voidgetImage(Integer pointId) throws Exception {
        File file = new File("C:\\Users\\Administrator\\Desktop\\002.png");　　//本地图片
        byte[] b= FileCopyUtils.copyToByteArray(file);
        PollingDataDTO dto = pollingDataMapper.getByPointId(pointId);
        dto.setImage(b);
        pollingDataMapper.updateByPrimaryKey(dto);
}