Hibernate关系映射

Posted 2020-09-25 margin_gu

1.一对多，多字段

@JsonIgnore
    @OneToMany(mappedBy = "abc",cascade={CascadeType.PERSIST},fetch=FetchType.LAZY)
    private Set<Entity> entity;

@ManyToOne(optional = true,fetch = FetchType.LAZY)
    @JoinColumnsOrFormulas(value={
    @JoinColumnOrFormula(column[email protected]( name = "id" ,referencedColumnName = "id" ,insertable =false, updatable = false)),
    @JoinColumnOrFormula(column[email protected]( name = "tid" ,referencedColumnName = "tid" ,insertable =false, updatable = false))})
    private ABC abc;

2.一对一，多字段

@JsonIgnore
    @OneToOne(optional = true,fetch = FetchType.LAZY)
    @JoinColumns(value={
            @JoinColumn(name="id",referencedColumnName="id",insertable =false, updatable = false),
            @JoinColumn(name="uid",referencedColumnName="uid",insertable =false, updatable = false)})
    private Entity entity;