@Entity
@Table
public class CompanyGroup implements Serializable {


    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue
    private Long id;
    @Column(name = "name")
    private String name;
    @JoinColumn(name = "companies")
    @OneToMany(fetch = FetchType.EAGER,cascade = CascadeType.ALL)
    private List<Company> companies;
}

公司：

@Entity
@Table
public class Company implements Serializable {
    private static final long serialVersionUID = 1L;

    @Column(name = "name")
    private String name;
    @JoinColumn(name = "users")
    @OneToMany(fetch = FetchType.EAGER,cascade = CascadeType.ALL)
    private List<User> users;

    @Id
    @GeneratedValue
    private Long id;
}

用户：

@Entity
@Table
public class User {

    @Column(name = "firstName")
    private String firstName;
    @Column(name = "lastName")
    private String lastName;
    @Column(name = "email")
    private String email;


    @Id
    @GeneratedValue
    private Long id;
}

我省略了setter,getters等.

这不起作用.我正在尝试将一个CompanyGroup(有2个公司,每个公司有2个用户,所有实体都是唯一的)保存到一个完全空的数据库.

我坚持使用Spring-Data,在这样的服务中访问：

@Service
public class ConcreteCompanyGroupService implements CompanyGroupService {

    @Autowired
    private CompanyGroupRepository repository;
    @Transactional
    @Override
    public void save(CompanyGroup group) {
        repository.save(Collections.singleton(group));
    }
}

当我尝试调用此方法时,我会收到：

org.postgresql.util.PsqlException: ERROR: Syntax error at or near "User"
  Position: 13
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2458)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2158)
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:291)

希望我做了一些愚蠢的事情,有人可以很快找到.我不知道如何解决这个问题.

编辑：

我的pom.xml中的驱动程序：

<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>9.4.1211</version>
</dependency>