@ManyToMany没有连接表（旧数据库）

您可以尝试将其映射为两个只读的一对多关系：

public class User {    @Column(name = "ACCESS_GROUP")    private Integer group;    @oneToMany    @JoinColumn(name = "ACCESS_GROUP", referencedColumnName = "ACCESS_GROUP",        insertable = false, updateable = false)    private List<Access> accessList;    ...}public class Access {    @Column(name = "ACCESS_GROUP")    private Integer group;    @oneToMany    @JoinColumn(name = "ACCESS_GROUP", referencedColumnName = "ACCESS_GROUP",        insertable = false, updateable = false)    private List<User> userList;    ...}