给定一个HashMap，如何根据Java语言中的重复值对其进行过滤

import java.util.HashMap;

public class HashMapFilter {
    public static HashMap<String, String> filterHashMap(HashMap<String, String> originalHashMap) {
        HashMap<String, String> filteredHashMap = new HashMap<>();

        for (HashMap.Entry<String, String> entry : originalHashMap.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();

            // 判断值是否已经存在于新的HashMap中
            if (!filteredHashMap.containsValue(value)) {
                filteredHashMap.put(key, value);
            }
        }

        return filteredHashMap;
    }

    public static void main(String[] args) {
        // 示例用法
        HashMap<String, String> hashMap = new HashMap<>();
        hashMap.put("key1", "value1");
        hashMap.put("key2", "value2");
        hashMap.put("key3", "value1"); // 重复值

        HashMap<String, String> filteredHashMap = filterHashMap(hashMap);
        System.out.println(filteredHashMap);
    }
}