hibernate实体注解 @OneToMany、@OneToOne、@ManyToOne、@ManyToMany

@Fetch(FetchMode.SUBSELECT)
@OneToMany(targetEntity = AddressTest.class, cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinColumn(name = "ADDRESS_USERID", referencedColumnName = "USER_ID", insertable = false, updatable = false)
 private List<AddressTest> machineMapperList;


ADDRESS_USERID字段是ADDRESS_TEST表中的关联字段
USER_ID字段位USER_TEST表中的主键

结果：UserTest{userId=‘H320210816161029000001‘, userName=‘张三‘, 
machineMapperList=[AddressTest{addressId=‘H320210816161316000001‘, userId=‘H320210816161029000001‘, addressInfo=‘北京市‘, state=1}, 
AddressTest{addressId=‘H320210816161350000001‘, userId=‘H320210816161029000001‘, addressInfo=‘南京市‘, state=1}]}

@ManyToOne(targetEntity = UserTest.class, cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinColumn(name = "ADDRESS_USERID", referencedColumnName = "USER_ID", insertable = false, updatable = false)
private UserTest userTest

ADDRESS_USERID这个是ADDRESS_TEST表中的关联字段，这里正好于一对多的相反
USER_ID这是USER_TEST表中的主键

@OneToOne(targetEntity = UserTest.class, cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinColumn(name = "ADDRESS_USERID", referencedColumnName = "USER_ID", insertable = false, updatable = false)
 private UserTest userTest

这里的映射值同多对一的一样

@ManyToMany(targetEntity = UserTest.class, cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "A_U" , joinColumns = { @JoinColumn(name ="ADDRESS_USERID" )}, inverseJoinColumns = { @JoinColumn(name = "USER_ID") })
private List<UserTest> userTest


A_U是中间表
ADDRESS_USERID本表的外键
USER_ID是USER_TEST的主键