java - 使用 Jackson 解析复杂的 JSON 对象

Question

我需要使用 Jackson 库解析相对复杂的 JSON。你们能建议我应该拥有什么样的 Java 类结构以及使用什么 Jackson 方法来解析以下 JSON 对象。

是这样的:

{
  "firstField": "Something One",
  "secondField": "Something Two",
  "thirdField": [
    {
      "thirdField_one": "Something Four",
      "thirdField_two": "Something Five"
    },
    {
      "thirdField_one": "Something Six",
      "thirdField_two": "Something Seven"
    }
  ],
  "fifthField": [
    {
      "fifthField_one": "Something… ",
      "fifthField_two": "Something...",
      "fifthField_three": 12345
    },
    {
      "fifthField_one": "Something",
      "fifthField_two": "Something",
      "fifthField_three": 12345
    }
  ]
}

Answer 1

我更精通 Gson，但我认为这应该可行。

请参阅下面 StaxMan 的注释:

Jackson does not automatically detect private fields (it can be configured to, with @JsonAutoDetect or globally). So fields should either be private, annotated with @JsonProperty, or have matching public getter.

public class MyClass {
    private String firstField, secondField;
    private ThirdField thirdField;
    private FifthField fifthField;

    public static class ThirdField {
        private List<ThirdFieldItem> thirdField;
    }

    public static class ThirdFieldItem {
        private String thirdField_one, thirdField_two;
    }

    public static class FifthField {
        private List<FifthFieldItem> fifthField;
    }

    public static class FifthField {
        private String fifthField_one, fifthField_two;
        private int fifthField_three;
    }
}