请写出用Java实现利用redis以及hashmap获取某个接口在一天里被某个用户调用的次数的代码

假设需要获取的接口为 "/api/getData"，用户ID为 "123456"，并且已经配置好了Redis连接池和Jedis实例。以下是实现代码：

import java.util.HashMap;
import java.util.Map;
import redis.clients.jedis.Jedis;

public class ApiUsageCounter {
    private static final String API_USAGE_KEY_PREFIX = "api_usage:";
    private Jedis jedis;

    public ApiUsageCounter(Jedis jedis) {
        this.jedis = jedis;
    }

    public void incrementApiUsage(String api, String userId) {
        String key = API_USAGE_KEY_PREFIX + api;
        String field = userId + ":" + getCurrentDate();
        jedis.hincrBy(key, field, 1);
    }

    public long getApiUsage(String api, String userId) {
        String key = API_USAGE_KEY_PREFIX + api;
        String field = userId + ":" + getCurrentDate();
        String value = jedis.hget(key, field);
        return value == null ? 0 : Long.parseLong(value);
    }

    public Map<String, Long> getApiUsageAllUsers(String api) {
        String key = API_USAGE_KEY_PREFIX + api;
        Map<String, String> fieldValues = jedis.hgetAll(key);
        Map<String, Long> result = new HashMap<>();
        for (String field : fieldValues.keySet()) {
            String[] parts = field.split(":");
            String userId = parts[0];
            String date = parts[1];
            if (date.equals(getCurrentDate())) {
                long count = Long.parseLong(fieldValues.get(field));
                result.put(userId, count);
            }
        }
        return result;
    }

    private String getCurrentDate() {
        return LocalDate.now().format(DateTimeFormatter.ISO_DATE);
    }
}

使用示例：

// 初始化Redis连接池和Jedis实例
JedisPool jedisPool = new JedisPool("localhost", 6379);
Jedis jedis = jedisPool.getResource();

// 创建ApiUsageCounter实例
ApiUsageCounter counter = new ApiUsageCounter(jedis);

// 假设有一次调用
counter.incrementApiUsage("/api/getData", "123456");

// 获取用户123456在今天调用"/api/getData"的次数
long count = counter.getApiUsage("/api/getData", "123456");

// 获取所有用户今天调用"/api/getData"的次数
Map<String, Long> counts = counter.getApiUsageAllUsers("/api/getData");

// 关闭Jedis实例和Redis连接池
jedis.close();
jedisPool.close();