将com.alibaba.fastjson.JSONObject扁平化

可以使用递归的方式将一个嵌套的JSONObject对象扁平化成一个Map对象。

以下是一个示例代码：

import com.alibaba.fastjson.JSONObject;

import java.util.*;

public class JSONFlattener {

    public static Map<String, Object> flatten(JSONObject jsonObject) {
        Map<String, Object> flattenedMap = new HashMap<>();
        flatten("", jsonObject, flattenedMap);
        return flattenedMap;
    }

    private static void flatten(String prefix, JSONObject jsonObject, Map<String, Object> flattenedMap) {
        for (Map.Entry<String, Object> entry : jsonObject.entrySet()) {
            String key = entry.getKey();
            Object value = entry.getValue();
            if (value instanceof JSONObject) {
                flatten(prefix + key + ".", (JSONObject) value, flattenedMap);
            } else {
                flattenedMap.put(prefix + key, value);
            }
        }
    }
}

使用示例：

JSONObject jsonObject = new JSONObject();
jsonObject.put("name", "John");
jsonObject.put("age", 30);
JSONObject address = new JSONObject();
address.put("street", "123 Main St");
address.put("city", "Anytown");
address.put("state", "CA");
jsonObject.put("address", address);

Map<String, Object> flattenedMap = JSONFlattener.flatten(jsonObject);
System.out.println(flattenedMap);

输出结果：

{name=John, age=30, address.street=123 Main St, address.city=Anytown, address.state=CA}