Java 休眠列名

我不知道为什么Hibernate DDL（Hibernate.hbm2ddl.auto=update）为下面的类生成一个具有此列名的表

表：BLC\U类别\U媒体\U地图

“BLC_CATEGORY_CATEGORY_ID”、“bigint（20）”、“否”、“优先级”、“空值”

'MEDIA_ID'，'bigint（20）'，'NO'，'MUL'，NULL'，'

“MAP_KEY”、“varchar（255）”、“NO”、“PRI”、“NULL”

我没有发现NamingStrategy的任何自定义实现，所以。。。。为什么会这样

@Entity
@Table(name = "BLC_CATEGORY_MEDIA_MAP")
public class CategoryMediaMap implements Serializable {
    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 1L;

    @EmbeddedId
    CategoryMediaMapPK categoryMediaMapPK;

    **@Column(name = "KEY", nullable = false)**
    private String key;

    //get and set

    public static class CategoryMediaMapPK implements Serializable {
        /** The Constant serialVersionUID. */
        private static final long serialVersionUID = 1L;

        **@Column(name = "CATEGORY_ID", nullable = false)**
        private Long categoryId;

        @Column(name = "MEDIA_ID", nullable = false)
        private Long mediaId;

        // get and set