Google Guava Cache {alert type="info"}<!-- https://mvnrepository.com/artifact/com.google.guava/guava --> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>30.1.1-jre</version> </dependency>{/alert}基本工具类package com.sakura.Utils; import com.google.common.cache.CacheBuilder; import com.google.common.cache.CacheLoader; import com.google.common.cache.LoadingCache; import java.util.concurrent.ExecutionException; import java.util.concurrent.TimeUnit; /** * 基于Guava Cache缓存类 * */ public class TokenCache { private static LoadingCache<String,String> localCache= CacheBuilder.newBuilder() .initialCapacity(1000)//初始化缓存项为1000 .maximumSize(10000)//设置缓存项最大值不超过10000 .expireAfterAccess(365, TimeUnit.DAYS)//定时回收 规定时间没有操作就会被读写就会被回收 .build(new CacheLoader<String, String>() { //当缓存没有值的时候执行load方法 @Override public String load(String s) throws Exception { return "null"; } }); public static void set(String key,String value){ localCache.put(key,value); } public static String get(String key){ String value=null; try { value= localCache.get(key); if("null".equals(value)){ return null; } return value; } catch (ExecutionException e) { e.printStackTrace(); } return null; } }