GlobalCache 工具类

package com.neo.config;

import org.springframework.stereotype.Component;

import java.util.Map;

import java.util.concurrent.ConcurrentHashMap;

import java.util.concurrent.Executors;

import java.util.concurrent.ScheduledExecutorService;

import java.util.concurrent.TimeUnit;
@Component
public class GlobalCache {

    private Map<String, Object> cacheMap;

    private ScheduledExecutorService executorService;

    public GlobalCache() {

        this.cacheMap = new ConcurrentHashMap<>();

        this.executorService = Executors.newSingleThreadScheduledExecutor();

    }

    public void put(String key, Object value, long expiringTime, TimeUnit timeUnit) {

        this.cacheMap.put(key, value);

        this.executorService.schedule(() -> this.cacheMap.remove(key), expiringTime, timeUnit);

    }

    public Object get(String key) {

        return this.cacheMap.get(key);

    }

    public void remove(String key) {

        this.cacheMap.remove(key);

    }

    public void clear() {

        this.cacheMap.clear();

    }

    public void stop() {

        this.executorService.shutdown();

    }

    public static void main(String[] args) throws InterruptedException {

        GlobalCache cache = new GlobalCache();

        cache.put("key1", "value1", 2, TimeUnit.SECONDS);

        System.out.println(cache.get("key1")); // value1

        Thread.sleep(3000);

        System.out.println(cache.get("key1")); // null

        cache.stop();

    }
}