Hibernate一对多单向，多对一单向，多对一双向关联

Person和Dream类

一对多单向关联

person中的

@OneToMany
public Set<Dream> getSetDream() {
return setDream;
}
public void setSetDream(Set<Dream> setDream) {
this.setDream = setDream;
}

生成的表

需要添加一个JoinColumn

person中的

@OneToMany
@JoinColumn(name="dream_id")
public Set<Dream> getSetDream() {
return setDream;
}
public void setSetDream(Set<Dream> setDream) {
this.setDream = setDream;
}

多对一单向关联

Dream类中

@ManyToOne
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}

多对一双向关联

在Dream类中

@ManyToOne
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}

在Person类中

@OneToMany(mappedBy="person")
public Set<Dream> getSetDream() {
return setDream;
}
public void setSetDream(Set<Dream> setDream) {
this.setDream = setDream;
}

双向设置mappedBy