Question

我试图在spring4中使用外键关联实现延迟加载我希望在使用客户实体进行反序列化时序列化具有id的实体。以下是我的实体。

我正在异常

com.fasterxml.jackson.databind.JsonMappingException: Conflicting setter definitions for property "customerId"

为什么会这样？我该怎么做才能实现这种情况。

public class Address {


@JsonIgnore
public Customer getCustomer() {
    return customer;
}
@JsonProperty("customerId")
public void setCustomer(Customer customer) {
    this.customer = customer;
}

@ManyToOne(targetEntity = Customer.class)
@JoinColumn(name="customerId", insertable=false, updatable = false)
@JsonIgnore
Customer customer;

@JsonProperty
public int getCustomerIdGen() {
    return customerIdGen;
}
@JsonIgnore
public void setCustomerIdGen(int customerId) {
    this.customerIdGen = customerId;

}

@JsonIgnore
@Column(name="customerId")
int customerIdGen;
String contactName;

}

Answer 1

您可以添加自定义反序列化器，如下所示：

public class Address {

    @JsonDeserialize(using = CustomerDeserializer.class)
    @JsonProperty("customerId")
    public void setCustomer(Customer customer) {
        this.customer = customer;
    }
    ...
}

这是解串器

public class CustomerDeserializer extends JsonDeserializer<Customer>{

    @Override
    public Customer deserialize(JsonParser jsonparser, DeserializationContext context)
      throws IOException, JsonProcessingException
    {
        int customerId = jsonparser.getInt();

        // Now create or find the way to get the customer object
        Customer c = new Customer(customerId);
        return c;
    }
}

为序列化和反序列化设置不同的变量

1 个答案: