更新时间:2021-11-18 19:55:39
不要寻找示例.阅读 官方文档:
Don't look for examples. Read the official documentation:
@Entity
public class Product {
private String serialNumber;
private Set<Part> parts = new HashSet<Part>();
@Id
public String getSerialNumber() { return serialNumber; }
void setSerialNumber(String sn) { serialNumber = sn; }
@OneToMany
@JoinTable(
name="PRODUCT_PARTS",
joinColumns = @JoinColumn( name="PRODUCT_ID"),
inverseJoinColumns = @JoinColumn( name="PART_ID")
)
public Set<Part> getParts() { return parts; }
void setParts(Set parts) { this.parts = parts; }
}
@Entity
public class Part {
...
}
另外,请注意这是单向一对多关联的默认设置.因此,如果默认表和列名称适合您,您甚至不必提供 @JoinTable
注释.
Also, note that this is the default for unidirectional one-to-many associations. So you don't even have to provide the @JoinTable
annotation if the default table and column names suit you.