java
import java.util.HashMap;
import java.util.Map;

public class DualKeyMap<K1, K2, V> {
    private final Map<K1, V> map1 = new HashMap<>();
    private final Map<K2, V> map2 = new HashMap<>();
    private final Map<K1, K2> keyRelation = new HashMap<>();
    private final Map<K2, K1> reverseKeyRelation = new HashMap<>();

    public void put(K1 key1, K2 key2, V value) {
        map1.put(key1, value);
        map2.put(key2, value);
        keyRelation.put(key1, key2);
        reverseKeyRelation.put(key2, key1);
    }

    public V getByKey1(K1 key1) {
        return map1.get(key1);
    }

    public V getByKey2(K2 key2) {
        return map2.get(key2);
    }

    public K2 getKey2(K1 key1) {
        return keyRelation.get(key1);
    }

    public K1 getKey1(K2 key2) {
        return reverseKeyRelation.get(key2);
    }

    public static void main(String[] args) {
        DualKeyMap<String, Integer, String> map = new DualKeyMap<>();
        map.put("A", 1, "Value1");
        map.put("B", 2, "Value2");

        System.out.println(map.getByKey1("A"));  // 输出: Value1
        System.out.println(map.getByKey2(2));    // 输出: Value2
        System.out.println(map.getKey2("B"));     // 输出: 2
        System.out.println(map.getKey1(1));       // 输出: A
    }
}