【java解析复杂嵌套式的JSON数据】

import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;

import com.google.gson.stream.JsonReader;

public class JsonParserExample {
    public static void main(String[] args) {
        String json = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\",\"hobbies\":[\"reading\",\"traveling\"]}";

        try (JsonReader reader = new JsonReader(new StringReader(json))) {
            reader.beginObject(); // 开始解析JSON对象

            while (reader.hasNext()) {
                String name = reader.nextName(); // 获取属性名

                if (name.equals("name")) {
                    String value = reader.nextString(); // 获取属性值
                    System.out.println("Name: " + value);
                } else if (name.equals("age")) {
                    int value = reader.nextInt(); // 获取属性值
                    System.out.println("Age: " + value);
                } else if (name.equals("city")) {
                    String value = reader.nextString(); // 获取属性值
                    System.out.println("City: " + value);
                } else if (name.equals("hobbies")) {
                    reader.beginArray(); // 开始解析数组
                    List<String> hobbies = new ArrayList<>();
                    while (reader.hasNext()) {
                        String value = reader.nextString(); // 获取数组元素值
                        hobbies.add(value);
                    }
                    reader.endArray(); // 结束解析数组
                    System.out.println("Hobbies: " + hobbies);
                } else {
                    reader.skipValue(); // 忽略未知的属性或值
                }
            }

            reader.endObject(); // 结束解析JSON对象
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

{
    "name": "John",
    "age": 30,
    "city": "New York",
    "hobbies": ["reading", "traveling"]
}

Name: John
Age: 30
City: New York
Hobbies: [reading, traveling]