本小章的内容比较简单,列出了jedis-client端常用的一些API,可以做为开发时一个查询字典使用。
spring整合
Sprint-data-redis
配置
<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="${redis.maxIdle}" />
<property name="maxActive" value="${redis.maxActive}" />
<property name="maxWait" value="${redis.maxWait}" />
<property name="testOnBorrow" value="${redis.testOnBorrow}" />
</bean>
<bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:pool-config-ref="poolConfig"/>
<bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
<property name="connectionFactory" ref="connectionFactory" />
</bean>
<bean id="userDAO" class="com.x.redis.dao.impl.UserDAOImpl" />
测试
public class UserDAOImpl implements UserDAO {
protected RedisTemplate<Serializable, Serializable> redisTemplate;
public void saveUser(final User user) {
redisTemplate.execute(new RedisCallback<Object>() {
public Object doInRedis(RedisConnection connection) throws DataAccessException {
connection.set(redisTemplate.getStringSerializer().serialize("user.uid." + user.getId()),
redisTemplate.getStringSerializer().serialize(user.getName()));
return null;
}
});
}
public User getUser(final long id) {
return redisTemplate.execute(new RedisCallback<User>() {
public User doInRedis(RedisConnection connection) throws DataAccessException {
byte[] key = redisTemplate.getStringSerializer().serialize("user.uid." + id);
if (connection.exists(key)) {
byte[] value = connection.get(key);
String name = redisTemplate.getStringSerializer().deserialize(value);
User user = new User();
user.setName(name);
user.setId(id);
return user;
}
return null;
}
});
}
}
public static void main(String[] args) {
ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/applicationContext.xml");
UserDAO userDAO = (UserDAO)ac.getBean("userDAO");
User user1 = new User();
user1.setId(1);
user1.setName("obama");
userDAO.saveUser(user1);
User user2 = userDAO.getUser(1);
System.out.println(user2.getName());
}
jedis
配置
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxActive" value="50" />
<property name="maxIdle" value="8" />
<property name="maxWait" value="1000" />
<property name="testOnBorrow" value="true"/>
<property name="testOnReturn" value="true"/>
<!-- <property name="testWhileIdle" value="true"/> -->
</bean>
<bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool" scope="singleton">
<constructor-arg index="0" ref="jedisPoolConfig" />
<constructor-arg index="1">
<list>
<bean class="redis.clients.jedis.JedisShardInfo">
<constructor-arg name="host" value="${redis.host}" />
<constructor-arg name="port" value="${redis.port}" />
<constructor-arg name="timeout" value="${redis.timeout}" />
<constructor-arg name="weight" value="1" />
</bean>
</list>
</constructor-arg>
</bean>
测试
"redisDataSource")(
public class RedisDataSourceImpl implements RedisDataSource {
private static final Logger log = LoggerFactory.getLogger(RedisDataSourceImpl.class);
private ShardedJedisPool shardedJedisPool;
public ShardedJedis getRedisClient() {
try {
ShardedJedis shardJedis = shardedJedisPool.getResource();
return shardJedis;
} catch (Exception e) {
log.error("getRedisClent error", e);
}
return null;
}
public void returnResource(ShardedJedis shardedJedis) {
shardedJedisPool.returnResource(shardedJedis);
}
public void returnResource(ShardedJedis shardedJedis, boolean broken) {
if (broken) {
shardedJedisPool.returnBrokenResource(shardedJedis);
} else {
shardedJedisPool.returnResource(shardedJedis);
}
}
}
public static void main(String[] args) {
ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/data-source.xml");
RedisClientTemplate redisClient = (RedisClientTemplate)ac.getBean("redisClientTemplate");
redisClient.set("a", "abc");
System.out.println(redisClient.get("a"));
}
连接池
通用配置
/**利用事务机制我们可以实现一些redis未提供的命令*/
public class Main {
private static Jedis jedis = new Jedis("localhost", 6379);
private static List<JedisShardInfo> shards = Arrays.asList(new JedisShardInfo("localhost", 6379));
public static void main(String[] args) {
/*普通同步方式,每次set之后都可以返回结果,标记是否成功*/
Main.syncOperate();
/*事务异步方式,不能同步查询结果,他主要目的是保障,一个client发起的事务中的命令可以连续的执行,而中间不会插入其他client的命令*/
Main.transOperate();
/*管道异步方式,不能同步查询结果,一次发送多个指令,不同步等待其返回结果。这样可以取得非常好的执行效率*/
Main.pipelinedOperate();
/*管道中调用事务,但其效率和单独使用事务差不多,甚至还略微差点,可以直接用事务模式,非常占用内存*/
//Main.pipelineTransOperate();
/*分布式直连同步调用,分布式直接连接,并且是同步调用,每步执行都返回执行结果*/
Main.shardSyncOperate();
/*分布式直连异步调用,如果累兎的key不够多,反倒不能起到提高效率的目的,建议使用keytag将关联的key放到同一个shard之中*/
Main.shardAsynOperate();
jedis.disconnect();
/*分布式中连接池的性能比直连的性能略好,分布式不支持事务,因为事务是在服务器端实现,在分布式中,每批次的调用对象都可能访问不同的机器*/
/*分布式连接池同步调用,如果分布式调用代码是运行在线程中,那么直连调用方式就不合适了,因为直连方式是非线程安全的,就必须选择连接池调用*/
Main.shardPoolSyncOperate();
/*分布式连接池异步调用*/
Main.shardPoolAsynOperate();
/*普通同步方式: 7.414 seconds
事务异步方式: 0.402 seconds
管道异步方式: 0.235 seconds
分布式直连同步: 5.878 seconds
分布式直连异步: 0.234 seconds
分布式连接池同步: 5.491 seconds
分布式连接池异步: 0.21 seconds*/
}
public static void syncOperate() {
long start = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
String result = jedis.set("n" + i, "n" + i);
}
long end = System.currentTimeMillis();
System.out.println("普通同步方式: " + ((end - start)/1000.0) + " seconds");
}
public static void transOperate() {
long start = System.currentTimeMillis();
Transaction tx = jedis.multi();
for (int i = 0; i < 100000; i++) {
tx.set("t" + i, "t" + i);
}
List<Object> results = tx.exec();
long end = System.currentTimeMillis();
System.out.println("事务异步方式: " + ((end - start)/1000.0) + " seconds");
/*我们调用jedis.watch(…)方法来监控key,如果调用后key值发生变化,则整个事务会执行失败。
另外,事务中某个操作失败,并不会回滚其他操作。可以使用discard()方法来取消事务。*/
}
public static void pipelinedOperate() {
Pipeline pipeline = jedis.pipelined();
long start = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
pipeline.set("p" + i, "p" + i);
}
List<Object> results = pipeline.syncAndReturnAll();
long end = System.currentTimeMillis();
System.out.println("管道异步方式: " + ((end - start)/1000.0) + " seconds");
}
public static void pipelineTransOperate() {
long start = System.currentTimeMillis();
Pipeline pipeline = jedis.pipelined();
pipeline.multi();
for (int i = 0; i < 100000; i++) {
pipeline.set("" + i, "" + i);
}
pipeline.exec();
List<Object> results = pipeline.syncAndReturnAll();
long end = System.currentTimeMillis();
System.out.println("管道中调用事务: " + ((end - start)/1000.0) + " seconds");
}
public static void shardSyncOperate() {
ShardedJedis sharding = new ShardedJedis(shards);
long start = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
String result = sharding.set("sn" + i, "n" + i);
}
long end = System.currentTimeMillis();
System.out.println("分布式直连同步: " + ((end - start)/1000.0) + " seconds");
sharding.disconnect();
}
public static void shardAsynOperate() {
ShardedJedis sharding = new ShardedJedis(shards);
ShardedJedisPipeline pipeline = sharding.pipelined();
long start = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
pipeline.set("sp" + i, "p" + i);
}
List<Object> results = pipeline.syncAndReturnAll();
long end = System.currentTimeMillis();
System.out.println("分布式直连异步: " + ((end - start)/1000.0) + " seconds");
sharding.disconnect();
}
public static void shardPoolSyncOperate() {
ShardedJedisPool pool = new ShardedJedisPool(new JedisPoolConfig(), shards);
ShardedJedis one = pool.getResource();
long start = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
String result = one.set("spn" + i, "n" + i);
}
long end = System.currentTimeMillis();
pool.returnResource(one);
System.out.println("分布式连接池同步: " + ((end - start)/1000.0) + " seconds");
pool.destroy();
}
public static void shardPoolAsynOperate() {
ShardedJedisPool pool = new ShardedJedisPool(new JedisPoolConfig(), shards);
ShardedJedis one = pool.getResource();
ShardedJedisPipeline pipeline = one.pipelined();
long start = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
pipeline.set("sppn" + i, "n" + i);
}
List<Object> results = pipeline.syncAndReturnAll();
long end = System.currentTimeMillis();
pool.returnResource(one);
System.out.println("分布式连接池异步: " + ((end - start)/1000.0) + " seconds");
pool.destroy();
}
}
类型选型
/**
* ShardedJedis:切片客户端连接,群集使用一致性hash来确保一个key始终被指向相同的redis server,每个redis server被称为一个shard,每个
* shard都是一个master,所以不能在sharding中直接使用jedis的transactions, pipelining, pub/sub这些API,基本的原则是不能跨越shard,
* 但jedis并没有在API层面上禁止这些行为,这些行为会产生不确定的结果,可以使用keytags来人工干预,另外正在使用的shard是不能被改变的,可以
* 使用yaourt-dynamic sharding implementation来实现.
*
* jedis的对象池的实现是基于apache的commons-pool的,它还有一些扩展包,在特定场景下可以增强redis的功能
* Created by liudong on 15/7/8
*/
public class RedisClient {
private Jedis jedis;//非切片客户端连接
private JedisPool jedisPool;//非切片连接池
private ShardedJedis shardedJedis;//切片客户端连接,群集
private ShardedJedisPool shardedJedisPool;//切片连接池,群集
public RedisClient()
{
initialPool();
initialShardedPool();
shardedJedis = shardedJedisPool.getResource();
jedis = jedisPool.getResource();
}
/**
* 初始化非切片池
*/
private void initialPool()
{
/**
* 池基本配置
* maxActive:控制池中对象的最大数量,默认为8,如果是负数表示没有限制
* maxIdle:空闲的对象的最大数量,默认为8,如果是负数表示没有限制
* minIdle:空闲的对象的最小数量,默认为0
* whenExhaustedAction:设置池中对象被消耗完以后的行为:
* WHEN_EXHAUSTED_FAIL:抛出异常,
* WHEN_EXHAUSTED_GROW:创建一个新对象,
* WHEN_EXHAUSTED_BLOCK(默认值):一直等待直到一个对象可用,如果设置了maxWait(默认-1)则会等待这么长时间,如果maxWait为负,则会一直等待
* maxWait:指定等待的ms数
* testOnBorrow:pool会在borrowObject返回对象之前使用PoolableObjectFactory的validateObject来验证这个对象是否有效,如果验证未通过,则创建
* 一个新对象并返回,原来的对象会被丢弃,默认为false。
* testOnReturn:pool会在borrowObject返回对象之前使用PoolableObjectFactory的validateObject来验证这个对象是否有效,如果验证未通过,对象会
* 被丢弃,不放入池中,默认为false。
* testWhileIdle:指定idle对象是否应该使用PoolableObjectFactory的validateObject来验证,如果验证未通过,对象会在池中被删除,仅在设置了
* timeBetweenEvictionRunsMilis>0时才生效,默认为false。
* timeBetweenEvictionRunsMilis:指定驱逐线程的休眠时间,如果<0,则不会有驱逐线程运行,默认为-1
* numTestsPerEvictionRun:指定驱逐线程每次检测CF全家人数量 ,默认为3,也依赖timeBetweenEvictionRunsMilis是否大于0.
* minEvictableIdleTimeMillis:指定最小的空闲驱逐的时间间隔,空闲超过指定的时间的对象,会被清除,默认为30分种,也依赖timeBetweenEvictionRunsMilis是否大于0.
* lifo:pool可以被配置成LIFO, FIFO队列,来指定空闲对象被使用的次序,默认为true
*/
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(20);
config.setMaxIdle(5);
config.setMaxWaitMillis(1000l);
config.setTestOnBorrow(false);
jedisPool = new JedisPool(config,"127.0.0.1",6379);
}
/**
* 初始化切片池
*/
private void initialShardedPool()
{
// 池基本配置
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(20);
config.setMaxIdle(5);
config.setMaxWaitMillis(1000l);
config.setTestOnBorrow(false);
// slave链接
List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>();
shards.add(new JedisShardInfo("127.0.0.1", 6379, "master"));
//ShardedJedis shardJedis = new ShardedJedis(shards);//直接使用ShardedJedis
// 构造池
shardedJedisPool = new ShardedJedisPool(config, shards);
}
数据操作
key
private void KeyOperate()
{
System.out.println("======================key==========================");
// 清空数据
System.out.println("清空库中所有数据:"+jedis.flushDB());
// 判断key否存在
System.out.println("判断key999键是否存在:"+shardedJedis.exists("key999"));
System.out.println("新增key001,value001键值对:"+shardedJedis.set("key001", "value001"));
System.out.println("判断key001是否存在:"+shardedJedis.exists("key001"));
// 输出系统中所有的key
System.out.println("新增key002,value002键值对:"+shardedJedis.set("key002", "value002"));
System.out.println("系统中所有键如下:");
Set<String> keys = jedis.keys("*");
Iterator<String> it=keys.iterator() ;
while(it.hasNext()){
String key = it.next();
System.out.println(key);
}
// 删除某个key,若key不存在,则忽略该命令。
System.out.println("系统中删除key002: "+jedis.del("key002"));
System.out.println("判断key002是否存在:"+shardedJedis.exists("key002"));
// 设置 key001的过期时间
System.out.println("设置 key001的过期时间为5秒:"+jedis.expire("key001", 5));
try{
Thread.sleep(2000);
}
catch (InterruptedException e){
}
// 查看某个key的剩余生存时间,单位【秒】.永久生存或者不存在的都返回-1
System.out.println("查看key001的剩余生存时间:"+jedis.ttl("key001"));
// 移除某个key的生存时间
System.out.println("移除key001的生存时间:"+jedis.persist("key001"));
System.out.println("查看key001的剩余生存时间:"+jedis.ttl("key001"));
// 查看key所储存的值的类型
System.out.println("查看key所储存的值的类型:"+jedis.type("key001"));
/*
* 一些其他方法:1、修改键名:jedis.rename("key6", "key0");
* 2、将当前db的key移动到给定的db当中:jedis.move("foo", 1)
*/
}
string
private void StringOperate()
{
System.out.println("======================String_1==========================");
// 清空数据
System.out.println("清空库中所有数据:"+jedis.flushDB());
System.out.println("=============增=============");
jedis.set("key001","value001");
jedis.set("key002","value002");
jedis.set("key003","value003");
System.out.println("已新增的3个键值对如下:");
System.out.println(jedis.get("key001"));
System.out.println(jedis.get("key002"));
System.out.println(jedis.get("key003"));
System.out.println("=============删=============");
System.out.println("删除key003键值对:"+jedis.del("key003"));
System.out.println("获取key003键对应的值:"+jedis.get("key003"));
System.out.println("=============改=============");
//1、直接覆盖原来的数据
System.out.println("直接覆盖key001原来的数据:"+jedis.set("key001","value001-update"));
System.out.println("获取key001对应的新值:"+jedis.get("key001"));
//2、直接覆盖原来的数据
System.out.println("在key002原来值后面追加:"+jedis.append("key002","+appendString"));
System.out.println("获取key002对应的新值"+jedis.get("key002"));
System.out.println("=============增,删,查(多个)=============");
/**
* mset,mget同时新增,修改,查询多个键值对
* 等价于:
* jedis.set("name","ssss");
* jedis.set("jarorwar","xxxx");
*/
System.out.println("一次性新增key201,key202,key203,key204及其对应值:"+jedis.mset("key201","value201",
"key202","value202","key203","value203","key204","value204"));
System.out.println("一次性获取key201,key202,key203,key204各自对应的值:"+ jedis.mget("key201","key202","key203","key204"));
System.out.println("一次性删除key201,key202:"+jedis.del(new String[]{"key201", "key202"}));
System.out.println("一次性获取key201,key202,key203,key204各自对应的值:" + jedis.mget("key201", "key202", "key203", "key204"));
System.out.println();
//jedis具备的功能shardedJedis中也可直接使用,下面测试一些前面没用过的方法
System.out.println("======================String_2==========================");
// 清空数据
System.out.println("清空库中所有数据:"+jedis.flushDB());
System.out.println("=============新增键值对时防止覆盖原先值=============");
System.out.println("原先key301不存在时,新增key301:"+shardedJedis.setnx("key301", "value301"));
System.out.println("原先key302不存在时,新增key302:"+shardedJedis.setnx("key302", "value302"));
System.out.println("当key302存在时,尝试新增key302:"+shardedJedis.setnx("key302", "value302_new"));
System.out.println("获取key301对应的值:"+shardedJedis.get("key301"));
System.out.println("获取key302对应的值:"+shardedJedis.get("key302"));
System.out.println("=============超过有效期键值对被删除=============");
// 设置key的有效期,并存储数据
System.out.println("新增key303,并指定过期时间为2秒"+shardedJedis.setex("key303", 2, "key303-2second"));
System.out.println("获取key303对应的值:"+shardedJedis.get("key303"));
try{
Thread.sleep(3000);
}
catch (InterruptedException e){
}
System.out.println("3秒之后,获取key303对应的值:"+shardedJedis.get("key303"));
System.out.println("=============获取原值,更新为新值一步完成=============");
System.out.println("key302原值:"+shardedJedis.getSet("key302", "value302-after-getset"));
System.out.println("key302新值:"+shardedJedis.get("key302"));
System.out.println("=============获取子串=============");
System.out.println("获取key302对应值中的子串:"+shardedJedis.getrange("key302", 5, 7));
}
list
private void ListOperate()
{
System.out.println("======================list==========================");
// 清空数据
System.out.println("清空库中所有数据:"+jedis.flushDB());
System.out.println("=============增=============");
shardedJedis.lpush("stringlists", "vector");
shardedJedis.lpush("stringlists", "ArrayList");
shardedJedis.lpush("stringlists", "vector");
shardedJedis.lpush("stringlists", "vector");
shardedJedis.lpush("stringlists", "LinkedList");
shardedJedis.lpush("stringlists", "MapList");
shardedJedis.lpush("stringlists", "SerialList");
shardedJedis.lpush("stringlists", "HashList");
shardedJedis.lpush("numberlists", "3");
shardedJedis.lpush("numberlists", "1");
shardedJedis.lpush("numberlists", "5");
shardedJedis.lpush("numberlists", "2");
System.out.println("所有元素-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
System.out.println("所有元素-numberlists:"+shardedJedis.lrange("numberlists", 0, -1));
System.out.println("=============删=============");
// 删除列表指定的值 ,第二个参数为删除的个数(有重复时),后add进去的值先被删,类似于出栈
System.out.println("成功删除指定元素个数-stringlists:"+shardedJedis.lrem("stringlists", 2, "vector"));
System.out.println("删除指定元素之后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
// 删除区间以外的数据
System.out.println("删除下标0-3区间之外的元素:"+shardedJedis.ltrim("stringlists", 0, 3));
System.out.println("删除指定区间之外元素后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
// 列表元素出栈
System.out.println("出栈元素:"+shardedJedis.lpop("stringlists"));
System.out.println("元素出栈后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
System.out.println("=============改=============");
// 修改列表中指定下标的值
shardedJedis.lset("stringlists", 0, "hello list!");
System.out.println("下标为0的值修改后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
System.out.println("=============查=============");
// 数组长度
System.out.println("长度-stringlists:"+shardedJedis.llen("stringlists"));
System.out.println("长度-numberlists:"+shardedJedis.llen("numberlists"));
// 排序
/*
* list中存字符串时必须指定参数为alpha,如果不使用SortingParams,而是直接使用sort("list"),
* 会出现"ERR One or more scores can't be converted into double"
*/
SortingParams sortingParameters = new SortingParams();
sortingParameters.alpha();
sortingParameters.limit(0, 3);
System.out.println("返回排序后的结果-stringlists:"+shardedJedis.sort("stringlists",sortingParameters));
System.out.println("返回排序后的结果-numberlists:"+shardedJedis.sort("numberlists"));
// 子串: start为元素下标,end也为元素下标;-1代表倒数一个元素,-2代表倒数第二个元素
System.out.println("子串-第二个开始到结束:"+shardedJedis.lrange("stringlists", 1, -1));
// 获取列表指定下标的值
System.out.println("获取下标为2的元素:"+shardedJedis.lindex("stringlists", 2)+"\n");
}
set
private void SetOperate()
{
System.out.println("======================set==========================");
// 清空数据
System.out.println("清空库中所有数据:"+jedis.flushDB());
System.out.println("=============增=============");
System.out.println("向sets集合中加入元素element001:"+jedis.sadd("sets", "element001"));
System.out.println("向sets集合中加入元素element002:"+jedis.sadd("sets", "element002"));
System.out.println("向sets集合中加入元素element003:"+jedis.sadd("sets", "element003"));
System.out.println("向sets集合中加入元素element004:"+jedis.sadd("sets", "element004"));
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));
System.out.println();
System.out.println("=============删=============");
System.out.println("集合sets中删除元素element003:"+jedis.srem("sets", "element003"));
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));
/*System.out.println("sets集合中任意位置的元素出栈:"+jedis.spop("sets"));//注:出栈元素位置居然不定?--无实际意义
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));*/
System.out.println();
System.out.println("=============改=============");
System.out.println();
System.out.println("=============查=============");
System.out.println("判断element001是否在集合sets中:"+jedis.sismember("sets", "element001"));
System.out.println("循环查询获取sets中的每个元素:");
Set<String> set = jedis.smembers("sets");
Iterator<String> it=set.iterator() ;
while(it.hasNext()){
Object obj=it.next();
System.out.println(obj);
}
System.out.println();
System.out.println("=============集合运算=============");
System.out.println("sets1中添加元素element001:"+jedis.sadd("sets1", "element001"));
System.out.println("sets1中添加元素element002:"+jedis.sadd("sets1", "element002"));
System.out.println("sets1中添加元素element003:"+jedis.sadd("sets1", "element003"));
System.out.println("sets1中添加元素element002:"+jedis.sadd("sets2", "element002"));
System.out.println("sets1中添加元素element003:"+jedis.sadd("sets2", "element003"));
System.out.println("sets1中添加元素element004:"+jedis.sadd("sets2", "element004"));
System.out.println("查看sets1集合中的所有元素:"+jedis.smembers("sets1"));
System.out.println("查看sets2集合中的所有元素:"+jedis.smembers("sets2"));
System.out.println("sets1和sets2交集:"+jedis.sinter("sets1", "sets2"));
System.out.println("sets1和sets2并集:"+jedis.sunion("sets1", "sets2"));
System.out.println("sets1和sets2差集:"+jedis.sdiff("sets1", "sets2"));//差集:set1中有,set2中没有的元素
}
sortset
private void SortedSetOperate()
{
System.out.println("======================zset==========================");
// 清空数据
System.out.println(jedis.flushDB());
System.out.println("=============增=============");
System.out.println("zset中添加元素element001:"+shardedJedis.zadd("zset", 7.0, "element001"));
System.out.println("zset中添加元素element002:"+shardedJedis.zadd("zset", 8.0, "element002"));
System.out.println("zset中添加元素element003:"+shardedJedis.zadd("zset", 2.0, "element003"));
System.out.println("zset中添加元素element004:"+shardedJedis.zadd("zset", 3.0, "element004"));
System.out.println("zset集合中的所有元素:"+shardedJedis.zrange("zset", 0, -1));//按照权重值排序
System.out.println();
System.out.println("=============删=============");
System.out.println("zset中删除元素element002:"+shardedJedis.zrem("zset", "element002"));
System.out.println("zset集合中的所有元素:"+shardedJedis.zrange("zset", 0, -1));
System.out.println();
System.out.println("=============改=============");
System.out.println();
System.out.println("=============查=============");
System.out.println("统计zset集合中的元素中个数:"+shardedJedis.zcard("zset"));
System.out.println("统计zset集合中权重某个范围内(1.0——5.0),元素的个数:"+shardedJedis.zcount("zset", 1.0, 5.0));
System.out.println("查看zset集合中element004的权重:"+shardedJedis.zscore("zset", "element004"));
System.out.println("查看下标1到2范围内的元素值:"+shardedJedis.zrange("zset", 1, 2));
}
hash
private void HashOperate()
{
System.out.println("======================hash==========================");
//清空数据
System.out.println(jedis.flushDB());
System.out.println("=============增=============");
System.out.println("hashs中添加key001和value001键值对:"+shardedJedis.hset("hashs", "key001", "value001"));
System.out.println("hashs中添加key002和value002键值对:"+shardedJedis.hset("hashs", "key002", "value002"));
System.out.println("hashs中添加key003和value003键值对:"+shardedJedis.hset("hashs", "key003", "value003"));
System.out.println("新增key004和4的整型键值对:"+shardedJedis.hincrBy("hashs", "key004", 4l));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"));
System.out.println();
System.out.println("=============删=============");
System.out.println("hashs中删除key002键值对:"+shardedJedis.hdel("hashs", "key002"));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"));
System.out.println();
System.out.println("=============改=============");
System.out.println("key004整型键值的值增加100:"+shardedJedis.hincrBy("hashs", "key004", 100l));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"));
System.out.println();
System.out.println("=============查=============");
System.out.println("判断key003是否存在:"+shardedJedis.hexists("hashs", "key003"));
System.out.println("获取key004对应的值:"+shardedJedis.hget("hashs", "key004"));
System.out.println("批量获取key001和key003对应的值:"+shardedJedis.hmget("hashs", "key001", "key003"));
System.out.println("获取hashs中所有的key:"+shardedJedis.hkeys("hashs"));
System.out.println("获取hashs中所有的value:"+shardedJedis.hvals("hashs"));
System.out.println();
}
订阅
class Subscribe extends JedisPubSub {
//订阅redis的channel,subscribe是一个阻塞操作,一个JedisPubSub的实例可以订阅多个redis的channel
public static void main(String []args){
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(20);
config.setMaxIdle(5);
config.setMaxWaitMillis(1000l);
config.setTestOnBorrow(false);
JedisPool jedisPool = new JedisPool(config,"127.0.0.1",6379);
Jedis jedis = jedisPool.getResource();
Subscribe l = new Subscribe();
jedis.subscribe(l, "foo");
}
}