Spring boot Spring引导REST JPA JSON格式

我正在用SpringBoot和JPA编写REST服务。我在具有复合键的表中有一对多映射。假设父表“订单”有2个复合键（订单id、销售日期），而“订单明细”有多个订单项目和3个复合键（订单id、销售日期和项目id），那么我的请求对象应该是什么样的。我想知道是否可以不显式设置连接列属性并持久化对象；就像我想发送下面的POST负载并将其映射到Order对象一样。此映射不会为OrderDetail的复合键salesDate和orderId设置值。因此，由于重复，持久化将失败

{
    "salesDate": "2016-02-12",
    "orderId": 12,
    "Description":"Sample order",
    "orderDetail":[{
      "itemId": 1231,
      "quantity": 2
    },
    {
      "itemId": 23342,
      "quantity": 1
    }]
}

Order.java：

@Entity
@Table(name = "ORDR")
@IdClass(OrderId.class)
public class Order implements Serializable {

    private static final long serialVersionUID = 2496620945369260577L;

    @Id
    @Column(name = "SLS_DT")
    private Date salesDate;

    @Id
    @Column(name = "ORDR_ID")
    private int orderId;

    @Column(name = "ORDR_DESC")
    private short orderDescription;

    @Column(name = "CUST_ID")
    private int customerId;

    @OneToMany(cascade= CascadeType.ALL, mappedBy = "order")
    private List<OrderDetail> orderItems;

    public Date getSalesDate() {
        return salesDate;
    }

    public void setSalesDate(Date salesDate) {
        this.salesDate = salesDate;
    }

    public int getOrderId() {
        return orderId;
    }

    public void setOrderId(int orderId) {
        this.orderId = orderId;
    }

    public short getOrderDescription() {
        return orderDescription;
    }

    public void setOrderDescription(short orderDescription) {
        this.orderDescription = orderDescription;
    }

    public int getCustomerId() {
        return customerId;
    }

    public void setCustomerId(int customerId) {
        this.customerId = customerId;
    }
}

OrderDetail.java

@Entity
@Table(name= "ORDR_DTL")
@IdClass(OrderDetail.class)
public class OrderDetail implements Serializable{

    private static final long serialVersionUID = 3603127094767197954L;

    @Id
    @Column(name = "SLS_DT")
    private Date salesDate;

    @Id
    @Column(name = "ORDR_ID")
    private int orderId;

    @Id
    @Column(name = "ITEM_ID")
    private int itemId;

    @ManyToOne(cascade = CascadeType.ALL)
    @JoinColumns({@JoinColumn(name = "SLS_DT", referencedColumnName = "SLS_DT", insertable = false, updatable = false),
            @JoinColumn(name = "ORDR_ID", referencedColumnName = "ORDR_ID", insertable = false, updatable = false)})
    private Order order;

    private BigDecimal quantity;

    public Date getSalesDate() {
        return salesDate;
    }

    public void setSalesDate(Date salesDate) {
        this.salesDate = salesDate;
    }

    public int getOrderId() {
        return orderId;
    }

    public void setOrderId(int orderId) {
        this.orderId = orderId;
    }

    public int getItemId() {
        return itemId;
    }

    public void setItemId(int itemId) {
        this.itemId = itemId;
    }

    public BigDecimal getQuantity() {
        return quantity;
    }

    public void setQuantity(BigDecimal quantity) {
        this.quantity = quantity;
    }
}

OrderDetailId.java：

public class OrderDetailId implements Serializable {

    private static final long serialVersionUID = 2312835624801595602L;
    private Date salesDate;
    private int orderId;
    public Date getSalesDate() {
        return salesDate;
    }
    public void setSalesDate(Date salesDate) {
        this.salesDate = salesDate;
    }
    public int getOrderId() {
        return orderId;
    }
    public void setOrderId(int orderId) {
        this.orderId = orderId;
    }
    public int getItemId() {
        return itemId;
    }
    public void setItemId(int itemId) {
        this.itemId = itemId;
    }
    private int itemId;
}

如果我通过以下JSON，它将按预期工作。但我不想重复订单细节中的键，也不想向客户机公开数据库结构

{
    "salesDate": "2016-02-12",
    "orderId": 12,
    "Description": "Sample order",
    "orderDetail": [{
        "salesDate": "2016-02-12",
        "orderId": 12,
        "itemId": 1231,
        "quantity": 2
    }, {
        "salesDate": "2016-02-12",
        "orderId": 12,
        "itemId": 23342,
        "quantity": 1
    }]
}

---

我可以传递第一个json并将其转换为JPA实体。但我认为应该有一个更干净的方法。JPA文档在这方面没有多大帮助。请帮助我解决此问题。

您可以尝试在

OrderDetailId

的

orderId

成员上使用

@JsonIgnore

注释。这将禁止JSON输出中的成员

@JsonIgnore
private int orderId;

还有类注释

@JsonIgnoreProperties（{“memberName”}）

。您不必将类源代码中的每个成员都标记为“内部”

@JsonIgnoreProperties({"orderId"})
public class OrderDetail implements Serializable {
    ...

---

谢谢你的回复。我知道我们可以使用@JsonIgnore进行响应。但我这里说的是请求有效负载。我想发布持久化的json，而不将请求重新格式化为实际的数据库实体结构。

@JsonIgnoreProperties({"orderId"})
public class OrderDetail implements Serializable {
    ...