Spring Boot REST JPA JSON格式

Question

我正在使用Spring Boot和JPA编写REST服务。我在具有复合键的表中有一对多的映射。假设如果父表“订单”有2个组合键（订单ID，销售日期），并且“订单明细”具有多个具有3个组合键（订单ID，销售日期和物料ID）的订单项，我的请求对象是。我想知道是否可以不显式设置连接列属性并保留对象;就像我想发送以下POST有效内容并将其映射到Order对象。此映射不会为OrderDetail的组合键salesDate和orderId设置值。由于这种持续失败，由于重复。

{ 
    "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; 
    } 
} 

OrderId.java：

public class OrderId { 

    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; 
    } 
} 

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; 
} 

如果我传递下面的JSON，它按预期工作。但我不想重复订单明细中的密钥，也不想将数据库结构公开给客户端。

{ 
    "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。但我相信应该有一个更清晰的方法来实现它。 JPA文档对此没有多大帮助。请帮我解决这个问题。

Answer 1

您可以尝试在OrderDetailId的orderId成员上使用@JsonIgnore注释。这应该从JSON输出压制成员。

@JsonIgnore 
private int orderId; 

此外还有班级注释@JsonIgnoreProperties({"memberName"})。您不必在类源代码的“内部”标记每个成员。

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