public class CacheUtil<K, V>{private final ConcurrentHashMap<K, CacheEntry<V>> cache = new ConcurrentHashMap<>();private final long ttl; // 缓存过期时间，单位：毫秒// 缓存条目类private static class CacheEntry<V> {V value;long expirationTime;CacheEntry(V value, long ttl) {this.value = value;this.expirationTime = System.currentTimeMillis() + ttl;}boolean isExpired() {return System.currentTimeMillis() > expirationTime;}}public CacheUtil(long ttl) {this.ttl = ttl; // 设置缓存的过期时间}// 添加缓存public void put(K key, V value) {cache.put(key, new CacheEntry<>(value, ttl));}// 获取缓存public V get(K key) {CacheEntry<V> entry = cache.get(key);if (entry == null || entry.isExpired()) {// 如果条目不存在或已过期，则移除并返回 nullcache.remove(key);return null;}return entry.value;}// 清除缓存public void remove(K key) {cache.remove(key);}// 清空整个缓存public void clear() {cache.clear();}// 检查缓存是否存在public boolean containsKey(K key) {return cache.containsKey(key) && !cache.get(key).isExpired();}
}

@Component
public class DingDingJobAlarm implements JobAlarm {
// 创建一个缓存工具，设置 TTL 为 一天private final CacheUtil<String, List<XxlJobGroup>> cache = new CacheUtil<>(60 * 1000 * 60 * 24);@Overridepublic boolean doAlarm(XxlJobInfo info, XxlJobLog jobLog) {
String redisKey = "spy:xxljob:group:info";try {List<XxlJobGroup> xxlJobGroups = cache.get(redisKey);if (CollectionUtils.isEmpty(xxlJobGroups) || !cache.containsKey(redisKey)) {xxlJobGroups = xxlJobGroupDao.findAll();cache.put(redisKey, xxlJobGroups);}}catch (Exception e) {log.error("xxlJob系统发送钉钉消息异常=", e);}
}}

xxlJobGroups 就是我的目标数据

package com.xxl.job.admin.core.model;import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;/*** Created by xuxueli on 16/9/30.*/
public class XxlJobGroup {private int id;private String appname;private String title;private int addressType;        // 执行器地址类型：0=自动注册、1=手动录入private String addressList;     // 执行器地址列表，多地址逗号分隔(手动录入)private Date updateTime;// registry listprivate List<String> registryList;  // 执行器地址列表(系统注册)public List<String> getRegistryList() {if (addressList!=null && addressList.trim().length()>0) {registryList = new ArrayList<String>(Arrays.asList(addressList.split(",")));}return registryList;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getAppname() {return appname;}public void setAppname(String appname) {this.appname = appname;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public int getAddressType() {return addressType;}public void setAddressType(int addressType) {this.addressType = addressType;}public String getAddressList() {return addressList;}public Date getUpdateTime() {return updateTime;}public void setUpdateTime(Date updateTime) {this.updateTime = updateTime;}public void setAddressList(String addressList) {this.addressList = addressList;}}