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java - 带有 @JsonProperty 注释的 json 模型的反序列化使用构建器模式更改了属性

问题描述

我正在编写一个共享对象ItineraryDataEntry，该对象将被导出到其他项目使用的库中。模型有很多属性，所以我使用的是构建器模式方法。我和 QA 都在同一个对象上进行反序列化，但看到不同的输入（数据库返回 json 作为字段变量集，我从 api 返回转换后的 json 键，格式更易读）。

是

1）我正在反序列化一个保存在航空公司数据库中的对象作为 json。然后，我将使用例如@JsonProperty("origin") for field02转换此对象的键，并将ItineraryDataEntry作为来自 Spring 控制器端点的复杂结构化 json 的一部分返回。对于这部分，我没有任何问题。

质量保证

2) QA 团队正在导入提到的库，并希望将我的 API 的响应反序列化到同一个ItineraryDataEntry对象。这是一个问题，因为杰克逊不知道如何将例如响应属性（“来源”）映射回field02。他们方面的解决方案是让我将@JsonProperty("origin")注释添加到构建器变量中。

！

但是在 2) 中添加注释会破坏反序列化，因为我正在反序列化一个不同于 QA 团队期望的 json。我也需要反序列化来进行数据库测试。

我将如何实现仍然使用具有构建器模式的单个类并且两个不同的输入都会正确反序列化？作为这个优秀社区的善良成员，我可以请求您的支持吗？

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

import java.io.Serializable;

/**
 * Model for Itinerary data item.
 */
@JsonInclude(JsonInclude.Include.NON_NULL)
@ApiModel(value = "ItineraryDataEntry")
@JsonIgnoreProperties(ignoreUnknown = true)
@JsonAutoDetect(getterVisibility = JsonAutoDetect.Visibility.NONE)
@JsonDeserialize(builder = ItineraryDataEntry.ItineraryDataEntryBuilder.class)
public class ItineraryDataEntry implements Serializable {

  @ApiModelProperty(value = "Item type", example = "pnr", allowableValues = "pnr,leg")
  @JsonProperty("type")
  private String type;

  @ApiModelProperty(value = "Item field01", example = "62SVBP")
  @JsonProperty("legNumber")
  private String field01;

  @ApiModelProperty(value = "Item field02", example = "MASON JAMES MR.")
  @JsonProperty("origin")
  private String field02;

  @ApiModelProperty(value = "Item field03", example = "194375957326594")
  @JsonProperty("destination")
  private String field03;

  @ApiModelProperty(value = "Item field04", example = "AIRLINE NAME")
  @JsonProperty("carrier")
  private String field04;

  @ApiModelProperty(value = "Item field05", example = "Y")
  @JsonProperty("fareBasisCode")
  private String field05;

  @ApiModelProperty(value = "Item field06", example = "TRAVEL AGENT NAME")
  @JsonProperty("serviceClass")
  private String field06;

  @JsonIgnore
  private String field07;

  @ApiModelProperty(value = "Item field08", example = "050918")
  @JsonProperty("flightDate")
  private String field08;

  @JsonIgnore
  private String field09;

  @JsonIgnore
  private String field10;

  @ApiModelProperty(value = "Item field11", example = "1115")
  @JsonProperty("departureTime")
  private String field11;

  @JsonIgnore
  private String field12;

  @JsonIgnore
  private String field13;

  @JsonIgnore
  private String field14;

  public String getType() {
    return type;
  }

  public void setType(final String type) {
    this.type = type;
  }

  public String getField01() {
    return field01;
  }

  public void setField01(final String field01) {
    this.field01 = field01;
  }

  public String getField02() {
    return field02;
  }

  public void setField02(final String field02) {
    this.field02 = field02;
  }

  public String getField03() {
    return field03;
  }

  public void setField03(final String field03) {
    this.field03 = field03;
  }

  public String getField04() {
    return field04;
  }

  public void setField04(final String field04) {
    this.field04 = field04;
  }

  public String getField05() {
    return field05;
  }

  public void setField05(final String field05) {
    this.field05 = field05;
  }

  public String getField06() {
    return field06;
  }

  public void setField06(final String field06) {
    this.field06 = field06;
  }

  public String getField08() {
    return field08;
  }

  public void setField08(final String field08) {
    this.field08 = field08;
  }

  public String getField11() {
    return field11;
  }

  public void setField11(final String field11) {
    this.field11 = field11;
  }

  public String getField07() {
    return field07;
  }

  public void setField07(final String field07) {
    this.field07 = field07;
  }

  public String getField09() {
    return field09;
  }

  public void setField09(final String field09) {
    this.field09 = field09;
  }

  public String getField10() {
    return field10;
  }

  public void setField10(final String field10) {
    this.field10 = field10;
  }

  public String getField12() {
    return field12;
  }

  public void setField12(final String field12) {
    this.field12 = field12;
  }

  public String getField13() {
    return field13;
  }

  public void setField13(final String field13) {
    this.field13 = field13;
  }

  public String getField14() {
    return field14;
  }

  public void setField14(final String field14) {
    this.field14 = field14;
  }

  public ItineraryDataEntry(final ItineraryDataEntryBuilder builder) {
    this.type = builder.type;
    this.field01 = builder.field01;
    this.field02 = builder.field02;
    this.field03 = builder.field03;
    this.field04 = builder.field04;
    this.field05 = builder.field05;
    this.field06 = builder.field06;
    this.field07 = builder.field07;
    this.field08 = builder.field08;
    this.field09 = builder.field09;
    this.field10 = builder.field10;
    this.field11 = builder.field11;
    this.field12 = builder.field12;
    this.field13 = builder.field13;
    this.field14 = builder.field14;
  }

  public ItineraryDataEntry() {
  }

  /**
   * The type Itinerary data entry builder.
   */
  @JsonPOJOBuilder(buildMethodName = "build", withPrefix = "")
  public static class ItineraryDataEntryBuilder {

    private String type;

    private String field01;

    private String field02;

    private String field03;

    private String field04;

    private String field05;

    private String field06;

    private String field07;

    private String field08;

    private String field09;

    private String field10;

    private String field11;

    private String field12;

    private String field13;

    private String field14;

    public ItineraryDataEntryBuilder type(final String param) {
      this.type = param;
      return this;
    }

    public ItineraryDataEntryBuilder field01(final String param) {
      this.field01 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field02(final String param) {
      this.field02 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field03(final String param) {
      this.field03 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field04(final String param) {
      this.field04 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field05(final String param) {
      this.field05 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field06(final String param) {
      this.field06 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field07(final String param) {
      this.field07 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field08(final String param) {
      this.field08 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field09(final String param) {
      this.field09 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field10(final String param) {
      this.field10 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field11(final String param) {
      this.field11 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field12(final String param) {
      this.field12 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field13(final String param) {
      this.field13 = param;
      return this;
    }

    public ItineraryDataEntryBuilder field14(final String param) {
      this.field14 = param;
      return this;
    }

    public ItineraryDataEntryBuilder() {
      // prevent init.
    }

    public ItineraryDataEntry build() {
      return new ItineraryDataEntry(this);
    }
  }
}

编辑：一个不理想的解决方案

感谢@Coder 的建议，我引入了额外的变量。这意味着我们可以使用相同的模型，并且对象按预期进行序列化/反序列化。 QA 调试 我已经在这个变量上添加了@JsonIgnore 注释，这样响应模型就不会改变，但是反序列化现在在双方都有效。

...
  @JsonIgnore
  private String legNumber;

  @JsonIgnore
  private String origin;

  @JsonIgnore
  private String destination;

  public String getLegNumber() {
    return legNumber;
  }

  public void setLegNumber(final String legNumber) {
    this.legNumber = legNumber;
  }

  public String getOrigin() {
    return origin;
  }

  public void setOrigin(final String origin) {
    this.origin = origin;
  }

  public String getDestination() {
    return destination;
  }

  public void setDestination(final String destination) {
    this.destination = destination;
  }
...

生成器部分

  public ItineraryDataEntry(final ItineraryDataEntryBuilder builder) {
    this.type = builder.type;
    this.field01 = builder.field01;
    this.field02 = builder.field02;
    this.field03 = builder.field03;
    this.field04 = builder.field04;
    this.field05 = builder.field05;
    this.field06 = builder.field06;
    this.field07 = builder.field07;
    this.field08 = builder.field08;
    this.field09 = builder.field09;
    this.field10 = builder.field10;
    this.field11 = builder.field11;
    this.field12 = builder.field12;
    this.field13 = builder.field13;
    this.field14 = builder.field14;
    this.legNumber = builder.legNumber;
    this.origin = builder.origin;
    this.destination = builder.destination;
    this.carrier = builder.carrier;
    this.fareBasisCode = builder.fareBasisCode;
    this.serviceClass = builder.serviceClass;
    this.flightDate = builder.flightDate;
    this.departureTime = builder.departureTime;
  }
...

    public ItineraryDataEntryBuilder origin(final String param) {
      this.origin = param;
      return this;
    }

    public ItineraryDataEntryBuilder destination(final String param) {
      this.destination = param;
      return this;
    }

    public ItineraryDataEntryBuilder carrier(final String param) {
      this.carrier = param;
      return this;
    }
...

标签： javajsonserializationjackson

解决方案

我认为你的问题本身就有答案。

我正在反序列化作为 json 保存在航空公司数据库中的对象。然后我正在转换这个对象的键

您不能一步完成并共享相同的模型并对其执行 2 次不同的反序列化。这超出了模型重用的目的。

相反，我建议有 2 个模型。一种反序列化为您通常可以跨团队/项目共享的结构。另一个将其映射到一个有意义的对象，例如具有类型、起点、目的地等的ItineraryDataEntry。然后，您可以在控制器中编写一个单独的方法来转换有意义的ItineraryDataEntry中的反序列化对象。

我假设您的模型比您提到的更深。在这种情况下，我建议探索Orika图书馆。

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