Question

我正在使用Gson库的@JsonAdapter注释将我的JSON对象序列化/反序列化为POJO。

反序列化工作正常，但序列化给了我这个

 {
    "name": "ana",
    "email": "test@test.co.uk",
    "address": {
        "address_line1": "123 Some Address",
        "address_line2": "",
        "address_city": "My city",
        "address_postalcode": "CV31 9GP"
    }
}

而不是

{
    "name": "ana",
    "email": "test@test.co.uk",
    "address_line1": "123 Some Address",
    "address_line2": "",
    "address_city": "My city",
    "address_postalcode": "CV31 9GP"
}

这是因为我正在返回一个JsonElement，但我看不到另一种序列化我的Address对象的方法。

有没有办法返回外键值对？

User.java：

public class User() {
    private String name;
    private String email;

    @JsonAdapter(AddressSerializer.class)
    private Address address;
    ...
}

AddressSerializer.java

public class AddressSerializer implements JsonSerializer<Address> {

    @Override
    public JsonElement serialize(Address src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject jsonAddress = new JsonObject();

        jsonAddress.addProperty("address_line1", src.getAddressLine1());
        jsonAddress.addProperty("address_line2", src.getAddressLine2());
        jsonAddress.addProperty("address_city", src.getCity());
        jsonAddress.addProperty("address_postalcode", src.getPostcode());

        return jsonAddress;
    }
}

Answer 1

你试过@JsonUnwrapped吗？

编辑：但是，因为@srinu指出你现在得到的JSON是标准表示，它表明Address是一个不同的对象。否则看起来所有属性都属于用户。

Answer 2

似乎与this问题有关。

您可以为用户序列化程序执行类似的操作：

public class UserSerializer implements JsonSerializer<User> {

    @Override
    public JsonElement serialize(User src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject jsonUser = new JsonObject();

        jsonUser.addProperty("name", src.getName());
        jsonUser.addProperty("email", src.getEmail());
        jsonUser.addProperty("address_line1", src.getAddress().getAddressLine1());
        jsonUser.addProperty("address_line2", src.getAddress().getAddressLine2());
        jsonUser.addProperty("address_city", src.getAddress().getCity());
        jsonUser.addProperty("address_postalcode", src.getAddress().getPostcode());

        return jsonUser;
    }
}

使用Gson @JsonAdapter注释的自定义POJO序列化程序

2 个答案: