Spring Data RedisTemplate抛出SerializationException

在Spring Boot中使用RedisTemplate时, 出现了这样的情况:

• 当使用new ArrayList<String>(Arrays.asList("abc", "def"))创建List时, 可以正常存入Redis;
• 而使用new ArrayList<String>(){{add("abc"); add("def");}}创建List时, 则会抛出异常.

@Autowired
private RedisTemplate redisTemplate;
@Test
public void testRedis() {
	ArrayList<String> strings = new ArrayList<String>(){{add("abc"); add("def");}};
	//ArrayList<String> strings = new ArrayList<String>(Arrays.asList("abc", "def"));

	try {
		redisTemplate.opsForValue().set("list", strings);
	}
	catch (Exception e) {
		e.printStackTrace();
	}
}

异常如下:

org.springframework.data.redis.serializer.SerializationException: Cannot serialize; 
nested exception is org.springframework.core.serializer.support.SerializationFailedException: 
Failed to serialize object using DefaultSerializer; 
nested exception is java.io.NotSerializableException: com.example.demo.DemoApplicationTests

Spring Boot版本:

Spring Boot(v2.3.7.RELEASE)

不知道出现这样情况的原因是什么?

希望能够得到大佬的指点! 不胜感激!