我们先看看项目结构，如下图：
<dependency> <groupId>net.oschina.j2cache</groupId> <artifactId>j2cache-core</artifactId> <version>2.8.0-release</version> </dependency> <dependency> <groupId>org.ehcache</groupId> <artifactId>ehcache</artifactId> <version>3.5.2</version> </dependency>
#J2Cache configuration ######################################### # Cache Broadcast Method # values: # jgroups -> use jgroups's multicast # redis -> use redis publish/subscribe mechanism (using jedis) # lettuce -> use redis publish/subscribe mechanism (using lettuce, Recommend) # rabbitmq -> use RabbitMQ publisher/consumer mechanism # rocketmq -> use RocketMQ publisher/consumer mechanism # none -> don't notify the other nodes in cluster # xx.xxxx.xxxx.Xxxxx your own cache broadcast policy classname that implement net.oschina.j2cache.cluster.ClusterPolicy ######################################### j2cache.broadcast = redis # jgroups properties jgroups.channel.name = j2cache jgroups.configXml = /network.xml # RabbitMQ properties rabbitmq.exchange = j2cache rabbitmq.host = localhost rabbitmq.port = 5672 rabbitmq.username = guest rabbitmq.password = guest # RocketMQ properties rocketmq.name = j2cache rocketmq.topic = j2cache # use ; to split multi hosts rocketmq.hosts = 127.0.0.1:9876 ######################################### # Level 1&2 provider # values: # none -> disable this level cache # ehcache -> use ehcache2 as level 1 cache # ehcache3 -> use ehcache3 as level 1 cache # caffeine -> use caffeine as level 1 cache(only in memory) # redis -> use redis as level 2 cache (using jedis) # lettuce -> use redis as level 2 cache (using lettuce) # readonly-redis -> use redis as level 2 cache ,but never write data to it. if use this provider, you must uncomment `j2cache.L2.config_section` to make the redis configurations available. # memcached -> use memcached as level 2 cache (xmemcached), # [classname] -> use custom provider ######################################### j2cache.L1.provider_class = ehcache3 j2cache.L2.provider_class = redis # When L2 provider isn't `redis`, using `L2.config_section = redis` to read redis configurations # j2cache.L2.config_section = redis # Enable/Disable ttl in redis cache data (if disabled, the object in redis will never expire, default:true) # NOTICE: redis hash mode (redis.storage = hash) do not support this feature) j2cache.sync_ttl_to_redis = true # Whether to cache null objects by default (default false) j2cache.default_cache_null_object = true ######################################### # Cache Serialization Provider # values: # fst -> using fast-serialization (recommend) # kryo -> using kryo serialization # json -> using fst's json serialization (testing) # fastjson -> using fastjson serialization (embed non-static class not support) # java -> java standard # fse -> using fse serialization # [classname implements Serializer] ######################################### j2cache.serialization = json #json.map.person = net.oschina.j2cache.demo.Person ######################################### # Ehcache configuration ######################################### # ehcache.configXml = /ehcache.xml # ehcache3.configXml = /ehcache3.xml # ehcache3.defaultHeapSize = 1000 ######################################### # Caffeine configuration # caffeine.region.[name] = size, xxxx[s|m|h|d] # ######################################### caffeine.properties = /caffeine.properties ######################################### # Redis connection configuration ######################################### ######################################### # Redis Cluster Mode # # single -> single redis server # sentinel -> master-slaves servers # cluster -> cluster servers (\u6570\u636e\u5e93\u914d\u7f6e\u65e0\u6548\uff0c\u4f7f\u7528 database = 0\uff09 # sharded -> sharded servers (\u5bc6\u7801\u3001\u6570\u636e\u5e93\u5fc5\u987b\u5728 hosts \u4e2d\u6307\u5b9a\uff0c\u4e14\u8fde\u63a5\u6c60\u914d\u7f6e\u65e0\u6548 ; redis://user:password@127.0.0.1:6379/0\uff09 # ######################################### redis.mode = single #redis storage mode (generic|hash) redis.storage = generic ## redis pub/sub channel name redis.channel = j2cache ## redis pub/sub server (using redis.hosts when empty) redis.channel.host = #cluster name just for sharded redis.cluster_name = j2cache ## redis cache namespace optional, default[empty] redis.namespace = ## redis command scan parameter count, default[1000] #redis.scanCount = 1000 ## connection # Separate multiple redis nodes with commas, such as 192.168.0.10:6379,192.168.0.11:6379,192.168.0.12:6379 redis.hosts = 127.0.0.1:6379 redis.timeout = 2000 redis.password = redis.database = 0 redis.ssl = false ## redis pool properties redis.maxTotal = 100 redis.maxIdle = 10 redis.maxWaitMillis = 5000 redis.minEvictableIdleTimeMillis = 60000 redis.minIdle = 1 redis.numTestsPerEvictionRun = 10 redis.lifo = false redis.softMinEvictableIdleTimeMillis = 10 redis.testOnBorrow = true redis.testOnReturn = false redis.testWhileIdle = true redis.timeBetweenEvictionRunsMillis = 300000 redis.blockWhenExhausted = false redis.jmxEnabled = false ######################################### # Lettuce scheme # # redis -> single redis server # rediss -> single redis server with ssl # redis-sentinel -> redis sentinel # redis-cluster -> cluster servers # ######################################### ## redis command scan parameter count, default[1000] #lettuce.scanCount = 1000 lettuce.namespace = lettuce.storage = hash lettuce.channel = j2cache lettuce.scheme = redis lettuce.hosts = 127.0.0.1:6379 lettuce.password = lettuce.database = 0 lettuce.sentinelMasterId = lettuce.maxTotal = 100 lettuce.maxIdle = 10 lettuce.minIdle = 10 # timeout in milliseconds lettuce.timeout = 10000 # redis cluster topology refresh interval in milliseconds lettuce.clusterTopologyRefresh = 3000 ######################################### # memcached server configurations # refer to https://gitee.com/mirrors/XMemcached ######################################### memcached.servers = 127.0.0.1:11211 memcached.username = memcached.password = memcached.connectionPoolSize = 10 memcached.connectTimeout = 1000 memcached.failureMode = false memcached.healSessionInterval = 1000 memcached.maxQueuedNoReplyOperations = 100 memcached.opTimeout = 100 memcached.sanitizeKeys = false
<!-- for ehcache 3.x --> <config xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='http://www.ehcache.org/v3' xsi:schemaLocation="http://www.ehcache.org/v3 http://www.ehcache.org/schema/ehcache-core.xsd"> <!-- Don't remote default cache configuration --> <cache-template name="default"> <key-type>java.lang.String</key-type> <value-type>java.io.Serializable</value-type> <expiry> <ttl unit="seconds">1800</ttl> </expiry> <resources> <heap>1000</heap> <offheap unit="MB">100</offheap> </resources> </cache-template> <cache alias="default" uses-template="default"/> </config>
package com.huangx.j2cache.demo1;
import net.oschina.j2cache.CacheChannel;
import net.oschina.j2cache.J2Cache;
/**
* 第一个 J2Cache 示例
* @author Administrator
* @date 2021/3/29 11:07
*/
public class Demo1 {
public static void main(String[] args) {
CacheChannel cache = J2Cache.getChannel();
// 写入缓存
cache.set("default", "1", "Hello J2Cache");
System.out.println(cache.get("default", "1"));
// 移除缓存
cache.evict("default", "1");
System.out.println(cache.get("default", "1"));
cache.close();
}
}运行实例代码结果如下：
