从嵌套的HashMap<String、HashMap<String、String>>中获取针对List<String>筛选的String>>

import java.util.HashMap;
import java.util.List;

public class HashMapExample {
    public static void main(String[] args) {
        // 嵌套的HashMap示例
        HashMap<String, HashMap<String, String>> nestedHashMap = new HashMap<>();

        // 添加示例数据
        HashMap<String, String> innerHashMap1 = new HashMap<>();
        innerHashMap1.put("key1", "value1");
        innerHashMap1.put("key2", "value2");
        nestedHashMap.put("category1", innerHashMap1);

        HashMap<String, String> innerHashMap2 = new HashMap<>();
        innerHashMap2.put("key3", "value3");
        innerHashMap2.put("key4", "value4");
        nestedHashMap.put("category2", innerHashMap2);

        // List<String>示例
        List<String> filterList = List.of("key2", "key4");

        // 从嵌套的HashMap中获取符合条件的String值
        for (HashMap<String, String> innerMap : nestedHashMap.values()) {
            for (String key : innerMap.keySet()) {
                if (filterList.contains(key)) {
                    String value = innerMap.get(key);
                    System.out.println(value);
                }
            }
        }
    }
}