代码之家 › 专栏 › 技术社区 › Hakan54

有没有办法从具有对象合成的pojo自动生成展平pojo

object-composition pojo elasticsearch java

Hakan54 · 技术社区 · 7 年前

我需要将文档存储到Elasticsearch索引中,因此我定义了一个映射。从我的java客户机中,我需要为它提供pojo,它看起来像Compony类。它有许多重复的值。我可以使用对象合成模式来解决这个问题,但Elasticsearch无法处理这种结构,因此它需要一个扁平的结构。

class Company {
    private String postalstreetName;
    private String postalHouseNumer;
    private String postalHouseLetter;
    private String postalHouseNumberAddition;
    private String postalZipCode;
    private String postalCity;
    private String postalCountry;

    private String visitorstreetName;
    private String visitorHouseNumer;
    private String visitorHouseLetter;
    private String visitorHouseNumberAddition;
    private String visitorZipCode;
    private String visitorCity;
    private String visitorCountry;

    private String establishmentstreetName;
    private String establishmentHouseNumer;
    private String establishmentHouseLetter;
    private String establishmentHouseNumberAddition;
    private String establishmentZipCode;
    private String establishmentCity;
    private String establishmentCountry;
}

实际上我想要下面的pojo,并以某种方式自动生成上面具有相同命名结构的pojo。

class Address {
    private String streetName;
    private String houseNumer;
    private String houseLetter;
    private String houseNumberAddition;
    private String zipCode;
    private String city;
    private String country;
}

class Company {
    private Address postalAddress;
    private Address visitorAddress;
    private Address establishmentAddress;
}

有人知道这样做是否可能,从具有对象组合的pojo自动生成一个扁平pojo,所有字段都有一个名称前缀?

1 回复 | 直到 7 年前

Hakan54 7 年前

@JsonUnwrapped 指向具有前缀值的字段,因此我的公司类如下所示:

class Company {
    @JsonUnwrapped(prefix = "postal")
    private Address postalAddress;
    @JsonUnwrapped(prefix = "visitor")
    private Address visitorAddress;
    @JsonUnwrapped(prefix = "Establishment")
    private Address establishmentAddress;
}

结果将是:

{
  "postalStreetName":"",
  "postalHouseNumer":"",
  "postalHouseLetter":"",
  "postalHouseNumberAddition":"",
  "postalCity":"",
  "postalCountry":"",
  "visitorStreetName":"",
  "visitorHouseNumer":"",
  "visitorHouseLetter":"",
  "visitorHouseNumberAddition":"",
  "visitorCity":"",
  "visitorCountry":"",
  "establishmentStreetName":"",
  "establishmentHouseNumer":"",
  "establishmentHouseLetter":"",
  "establishmentHouseNumberAddition":"",
  "establishmentCity":"",
  "establishmentCountry":""
}

推荐文章

Tejashwini · 使用POJO字段名将POJO转换为JsonNode

8 年前

java123999 · Java POJO到JSON的转换工具?

8 年前

Miri Yusifli · 为什么@GetMapping方法在发送响应时返回请求参数?

8 年前

Sam Thomas · 到嵌套POJO spring MVC的复杂Json

8 年前

Jeeppp · Jackson databind JSON布尔转换

8 年前

Angelo · javax。坚持不懈PersistenceException:组织。冬眠MappingException:未知实体:it。*。PoolStateResult |将结果映射到DTO(非实体)

8 年前

Crosk Cool · 编写具有公共字段的POJO的最佳方法

8 年前

Crosk Cool · 让生成器返回具有相同字段的两个不同POJO的对象的最佳方法是什么

9 年前

bibliophilsagar · 想要将json对象映射到java对象

9 年前

Andre Rocha · 在firebase中插入android POJO将生成json值列表

9 年前