检查map是否包含空值或键的最佳方法是什么？

Map<String, String> map = new HashMap<>();
map.put("key1", "value1");
map.put("key2", null);
map.put(null, "value3");

boolean containsNull = false;
boolean containsEmptyKey = false;

for (Map.Entry<String, String> entry : map.entrySet()) {
    if (entry.getKey() == null || entry.getValue() == null) {
        containsNull = true;
        break;
    }
    if (entry.getKey().isEmpty()) {
        containsEmptyKey = true;
        break;
    }
}

if (containsNull) {
    System.out.println("Map包含空值");
}

if (containsEmptyKey) {
    System.out.println("Map包含空键");
}