Redis教程

Redis随笔 Jedis、jedisCluster的使用

本文主要是介绍Redis随笔 Jedis、jedisCluster的使用,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!

1、Jedis客户端
https://redis.io/clients

2、Jedis源码包与使用介绍
https://github.com/xetorthio/jedis

3、项目中使用
通过maven引入Jedis的依赖包

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redis.clients
jedis
2.9.0
jar
compile

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4、Jedis的使用
创建Jedis对象,set方法存储key-value值,get方法获取key对应的值。主要是用于单个redis。

Jedis jedis = new Jedis(“192.168.56.180”, 6379);
jedis.set(“Jedis”, “Hello Work!”);
System.out.println(jedis.get(“Jedis”));
jedis.close();

这里是使用IDEA编辑器对Jedis类结构的一个关系图,从图中看出Jedis继承BinaryJedis,实现多个接口。

每一个接口都代表了一类Redis命令,例如JedisCommands中包含了SET GET等命令,MultiKeyCommands中包含了针对多个Key的MSET MGET等命令。

5、JedisCluster的使用
Jediscluster类图和jedis类图大致一样,不过jedisCluster有一些命令是不可用的。比如BinaryJedisCluster类被作废的命令。主要是用在集群中。

类图:

6、单个reids中API的测试
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package com.redis;

import org.junit.Test;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.SortingParams;

import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.concurrent.TimeUnit;

/**

  • 单机环境Redis操作:一台Redis服务器
    */
    public class Standalone {
    private static Jedis jedis;
    static {
    jedis = new Jedis(“192.168.56.180”, 6379);
    jedis.auth(“123456”); // 之前我在redis配置中配置了权限密码,这里需要设置
    }

    /**

    • 测试key - value 的数据
    • @throws InterruptedException
      /
      @Test
      public void testKey() throws InterruptedException {
      System.out.println(“清空数据:”+jedis.flushDB());
      System.out.println(“判断某个键是否存在:”+jedis.exists(“username”));
      System.out.println(“新增<‘username’,‘wukong’>的键值对:”+jedis.set(“username”, “wukong”));
      System.out.println(“是否存在:”+jedis.exists(“name”));
      System.out.println(“新增<‘password’,‘password’>的键值对:”+jedis.set(“password”, “password”));
      Set keys = jedis.keys("
      ");
      System.out.println(“系统中所有的键如下:”+keys);
      System.out.println(“删除键password:”+jedis.del(“password”));
      System.out.println(“判断键password是否存在:”+jedis.exists(“password”));
      System.out.println(“设置键username的过期时间为5s:”+jedis.expire(“username”, 5));
      TimeUnit.SECONDS.sleep(2);
      System.out.println(“查看键username的剩余生存时间:”+jedis.ttl(“username”));
      System.out.println(“移除键username的生存时间:”+jedis.persist(“username”));
      System.out.println(“查看键username的剩余生存时间:”+jedis.ttl(“username”));
      System.out.println(“查看键username所存储的值的类型:”+jedis.type(“username”));
      }

    /***

    • 字符串操作

    • memcached和redis同样有append的操作,但是memcached有prepend的操作,redis中并没有。

    • @throws InterruptedException
      */
      @Test
      public void testString() throws InterruptedException {
      jedis.flushDB();
      System.out.println("=增加数据=");
      System.out.println(jedis.set(“key1”,“value1”));
      System.out.println(jedis.set(“key2”,“value2”));
      System.out.println(jedis.set(“key3”, “value3”));
      System.out.println(“删除键key2:”+jedis.del(“key2”));
      System.out.println(“获取键key2:”+jedis.get(“key2”));
      System.out.println(“修改key1:”+jedis.set(“key1”, “value1Changed”));
      System.out.println(“获取key1的值:”+jedis.get(“key1”));
      System.out.println(“在key3后面加入值:”+jedis.append(“key3”, “End”));
      System.out.println(“key3的值:”+jedis.get(“key3”));
      System.out.println(“增加多个键值对:”+jedis.mset(“key01”,“value01”,“key02”,“value02”,“key03”,“value03”));
      System.out.println(“获取多个键值对:”+jedis.mget(“key01”,“key02”,“key03”));
      System.out.println(“获取多个键值对:”+jedis.mget(“key01”,“key02”,“key03”,“key04”));
      System.out.println(“删除多个键值对:”+jedis.del(new String[]{“key01”,“key02”}));
      System.out.println(“获取多个键值对:”+jedis.mget(“key01”,“key02”,“key03”));

      jedis.flushDB();
      System.out.println("=新增键值对防止覆盖原先值====");
      System.out.println(jedis.setnx(“key1”, “value1”));
      System.out.println(jedis.setnx(“key2”, “value2”));
      System.out.println(jedis.setnx(“key2”, “value2-new”));
      System.out.println(jedis.get(“key1”));
      System.out.println(jedis.get(“key2”));

      System.out.println("=新增键值对并设置有效时间===");
      System.out.println(jedis.setex(“key3”, 2, “value3”));
      System.out.println(jedis.get(“key3”));
      TimeUnit.SECONDS.sleep(3);
      System.out.println(jedis.get(“key3”));

      System.out.println("=获取原值,更新为新值");//GETSET is an atomic set this value and return the old value command.
      System.out.println(jedis.getSet(“key2”, “key2GetSet”));
      System.out.println(jedis.get(“key2”));

      System.out.println(“获得key2的值的字串:”+jedis.getrange(“key2”, 2, 4));
      }

    /***

    • 整数和浮点数
      */
      @Test
      public void testNumber() {
      jedis.flushDB();
      jedis.set(“key1”, “1”);
      jedis.set(“key2”, “2”);
      jedis.set(“key3”, “2.3”);
      System.out.println(“key1的值:”+jedis.get(“key1”));
      System.out.println(“key2的值:”+jedis.get(“key2”));
      System.out.println(“key1的值加1:”+jedis.incr(“key1”));
      System.out.println(“获取key1的值:”+jedis.get(“key1”));
      System.out.println(“key2的值减1:”+jedis.decr(“key2”));
      System.out.println(“获取key2的值:”+jedis.get(“key2”));
      System.out.println(“将key1的值加上整数5:”+jedis.incrBy(“key1”, 5));
      System.out.println(“获取key1的值:”+jedis.get(“key1”));
      System.out.println(“将key2的值减去整数5:”+jedis.decrBy(“key2”, 5));
      System.out.println(“获取key2的值:”+jedis.get(“key2”));
      }

    /***

    • 列表
      */
      @Test
      public void testList() {
      jedis.flushDB();
      System.out.println("=添加一个list=");
      jedis.lpush(“collections”, “ArrayList”, “Vector”, “Stack”, “HashMap”, “WeakHashMap”, “LinkedHashMap”);
      jedis.lpush(“collections”, “HashSet”);
      jedis.lpush(“collections”, “TreeSet”);
      jedis.lpush(“collections”, “TreeMap”);
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));//-1代表倒数第一个元素,-2代表倒数第二个元素
      System.out.println(“collections区间0-3的元素:”+jedis.lrange(“collections”,0,3));
      System.out.println("=");
      // 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(“删除指定元素个数:”+jedis.lrem(“collections”, 2, “HashMap”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“删除下表0-3区间之外的元素:”+jedis.ltrim(“collections”, 0, 3));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“collections列表出栈(左端):”+jedis.lpop(“collections”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“collections添加元素,从列表右端,与lpush相对应:”+jedis.rpush(“collections”, “EnumMap”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“collections列表出栈(右端):”+jedis.rpop(“collections”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“修改collections指定下标1的内容:”+jedis.lset(“collections”, 1, “LinkedArrayList”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println("
      =");
      System.out.println(“collections的长度:”+jedis.llen(“collections”));
      System.out.println(“获取collections下标为2的元素:”+jedis.lindex(“collections”, 2));
      System.out.println("===============================");
      jedis.lpush(“sortedList”, “3”,“6”,“2”,“0”,“7”,“4”);
      System.out.println(“sortedList排序前:”+jedis.lrange(“sortedList”, 0, -1));
      System.out.println(jedis.sort(“sortedList”));
      System.out.println(“sortedList排序后:”+jedis.lrange(“sortedList”, 0, -1));
      }

    /***

    • set集合
      */
      @Test
      public void testSet() {
      jedis.flushDB();
      System.out.println(“向集合中添加元素”);
      System.out.println(jedis.sadd(“eleSet”, “e1”,“e2”,“e4”,“e3”,“e0”,“e8”,“e7”,“e5”));
      System.out.println(jedis.sadd(“eleSet”, “e6”));
      System.out.println(jedis.sadd(“eleSet”, “e6”));
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“删除一个元素e0:”+jedis.srem(“eleSet”, “e0”));
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“删除两个元素e7和e6:”+jedis.srem(“eleSet”, “e7”,“e6”));
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“随机的移除集合中的一个元素:”+jedis.spop(“eleSet”));
      System.out.println(“随机的移除集合中的一个元素:”+jedis.spop(“eleSet”));
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“eleSet中包含元素的个数:”+jedis.scard(“eleSet”));
      System.out.println(“e3是否在eleSet中:”+jedis.sismember(“eleSet”, “e3”));
      System.out.println(“e1是否在eleSet中:”+jedis.sismember(“eleSet”, “e1”));
      System.out.println(“e1是否在eleSet中:”+jedis.sismember(“eleSet”, “e5”));
      System.out.println("=============================");
      System.out.println(jedis.sadd(“eleSet1”, “e1”,“e2”,“e4”,“e3”,“e0”,“e8”,“e7”,“e5”));
      System.out.println(jedis.sadd(“eleSet2”, “e1”,“e2”,“e4”,“e3”,“e0”,“e8”));
      System.out.println(“将eleSet1中删除e1并存入eleSet3中:”+jedis.smove(“eleSet1”, “eleSet3”, “e1”));
      System.out.println(“将eleSet1中删除e2并存入eleSet3中:”+jedis.smove(“eleSet1”, “eleSet3”, “e2”));
      System.out.println(“eleSet1中的元素:”+jedis.smembers(“eleSet1”));
      System.out.println(“eleSet3中的元素:”+jedis.smembers(“eleSet3”));
      System.out.println("集合运算
      =");
      System.out.println(“eleSet1中的元素:”+jedis.smembers(“eleSet1”));
      System.out.println(“eleSet2中的元素:”+jedis.smembers(“eleSet2”));
      System.out.println(“eleSet1和eleSet2的交集:”+jedis.sinter(“eleSet1”,“eleSet2”));
      System.out.println(“eleSet1和eleSet2的并集:”+jedis.sunion(“eleSet1”,“eleSet2”));
      System.out.println(“eleSet1和eleSet2的差集:”+jedis.sdiff(“eleSet1”,“eleSet2”));//eleSet1中有,eleSet2中没有
      }

    /***

    • 散列
      */
      @Test
      public void testHash() {
      jedis.flushDB();
      Map<String,String> map = new HashMap<String,String>();
      map.put(“key1”,“value1”);
      map.put(“key2”,“value2”);
      map.put(“key3”,“value3”);
      map.put(“key4”,“value4”);
      jedis.hmset(“hash”,map);
      jedis.hset(“hash”, “key5”, “value5”);
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));//return Map<String,String>
      System.out.println(“散列hash的所有键为:”+jedis.hkeys(“hash”));//return Set
      System.out.println(“散列hash的所有值为:”+jedis.hvals(“hash”));//return List
      System.out.println(“将key6保存的值加上一个整数,如果key6不存在则添加key6:”+jedis.hincrBy(“hash”, “key6”, 6));
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));
      System.out.println(“将key6保存的值加上一个整数,如果key6不存在则添加key6:”+jedis.hincrBy(“hash”, “key6”, 3));
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));
      System.out.println(“删除一个或者多个键值对:”+jedis.hdel(“hash”, “key2”));
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));
      System.out.println(“散列hash中键值对的个数:”+jedis.hlen(“hash”));
      System.out.println(“判断hash中是否存在key2:”+jedis.hexists(“hash”,“key2”));
      System.out.println(“判断hash中是否存在key3:”+jedis.hexists(“hash”,“key3”));
      System.out.println(“获取hash中的值:”+jedis.hmget(“hash”,“key3”));
      System.out.println(“获取hash中的值:”+jedis.hmget(“hash”,“key3”,“key4”));
      }

    /**

    • 有序集合
      */
      @Test
      public void testSortedSet() {
      jedis.flushDB();
      Map<String,Double> map = new HashMap<String,Double>();
      map.put(“key2”,1.2);
      map.put(“key3”,4.0);
      map.put(“key4”,5.0);
      map.put(“key5”,0.2);
      System.out.println(jedis.zadd(“zset”, 3,“key1”));
      System.out.println(jedis.zadd(“zset”,map));
      System.out.println(“zset中的所有元素:”+jedis.zrange(“zset”, 0, -1));
      System.out.println(“zset中的所有元素:”+jedis.zrangeWithScores(“zset”, 0, -1));
      System.out.println(“zset中的所有元素:”+jedis.zrangeByScore(“zset”, 0,100));
      System.out.println(“zset中的所有元素:”+jedis.zrangeByScoreWithScores(“zset”, 0,100));
      System.out.println(“zset中key2的分值:”+jedis.zscore(“zset”, “key2”));
      System.out.println(“zset中key2的排名:”+jedis.zrank(“zset”, “key2”));
      System.out.println(“删除zset中的元素key3:”+jedis.zrem(“zset”, “key3”));
      System.out.println(“zset中的所有元素:”+jedis.zrange(“zset”, 0, -1));
      System.out.println(“zset中元素的个数:”+jedis.zcard(“zset”));
      System.out.println(“zset中分值在1-4之间的元素的个数:”+jedis.zcount(“zset”, 1, 4));
      System.out.println(“key2的分值加上5:”+jedis.zincrby(“zset”, 5, “key2”));
      System.out.println(“key3的分值加上4:”+jedis.zincrby(“zset”, 4, “key3”));
      System.out.println(“zset中的所有元素:”+jedis.zrange(“zset”, 0, -1));
      }

    /**

    • 排序
      /
      @Test
      public void testSort()
      {
      jedis.flushDB();
      jedis.lpush(“collections”, “ArrayList”, “Vector”, “Stack”, “HashMap”, “WeakHashMap”, “LinkedHashMap”);
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      SortingParams sortingParameters = new SortingParams();
      System.out.println(jedis.sort(“collections”,sortingParameters.alpha()));
      System.out.println("=");
      jedis.lpush(“sortedList”, “3”,“6”,“2”,“0”,“7”,“4”);
      System.out.println(“sortedList排序前:”+jedis.lrange(“sortedList”, 0, -1));
      System.out.println(“升序:”+jedis.sort(“sortedList”, sortingParameters.asc()));
      System.out.println(“升序:”+jedis.sort(“sortedList”, sortingParameters.desc()));
      System.out.println("
      =");
      jedis.lpush(“userlist”, “33”);
      jedis.lpush(“userlist”, “22”);
      jedis.lpush(“userlist”, “55”);
      jedis.lpush(“userlist”, “11”);
      jedis.hset(“user:66”, “name”, “66”);
      jedis.hset(“user:55”, “name”, “55”);
      jedis.hset(“user:33”, “name”, “33”);
      jedis.hset(“user:22”, “name”, “79”);
      jedis.hset(“user:11”, “name”, “24”);
      jedis.hset(“user:11”, “add”, “beijing”);
      jedis.hset(“user:22”, “add”, “shanghai”);
      jedis.hset(“user:33”, “add”, “guangzhou”);
      jedis.hset(“user:55”, “add”, “chongqing”);
      jedis.hset(“user:66”, “add”, “xi’an”);
      sortingParameters = new SortingParams();
      sortingParameters.get("user:
      ->name");
      sortingParameters.get(“user:*->add”);
      System.out.println(jedis.sort(“userlist”,sortingParameters));
      }
      }
      复制代码
      7、集群reids中API的测试
      复制代码
      package com.redis;

import org.junit.Test;
import redis.clients.jedis.HostAndPort;
import redis.clients.jedis.JedisCluster;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.SortingParams;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

/**

  • 集群环境下Jedis操作
    */
    public class Cluster {
    private static JedisCluster jedis;
    static {
    // 添加集群的服务节点Set集合
    Set hostAndPortsSet = new HashSet();
    // 添加节点
    hostAndPortsSet.add(new HostAndPort(“192.168.56.180”, 7777));
    hostAndPortsSet.add(new HostAndPort(“192.168.56.180”, 8888));
    hostAndPortsSet.add(new HostAndPort(“192.168.56.181”, 7777));
    hostAndPortsSet.add(new HostAndPort(“192.168.56.181”, 8888));
    hostAndPortsSet.add(new HostAndPort(“192.168.56.182”, 7777));
    hostAndPortsSet.add(new HostAndPort(“192.168.56.182”, 8888));

     // Jedis连接池配置
     JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
     // 最大空闲连接数, 默认8个
     jedisPoolConfig.setMaxIdle(100);
     // 最大连接数, 默认8个
     jedisPoolConfig.setMaxTotal(500);
     //最小空闲连接数, 默认0
     jedisPoolConfig.setMinIdle(0);
     // 获取连接时的最大等待毫秒数(如果设置为阻塞时BlockWhenExhausted),如果超时就抛异常, 小于零:阻塞不确定的时间,  默认-1
     jedisPoolConfig.setMaxWaitMillis(2000); // 设置2秒
     //对拿到的connection进行validateObject校验
     jedisPoolConfig.setTestOnBorrow(true);
     jedis = new JedisCluster(hostAndPortsSet, jedisPoolConfig);
    

    }

    /**

    • 测试key:value数据
    • 集群中flushDB、keys废弃
      /
      @Test
      public void testKey() throws InterruptedException {
      //System.out.println(“清空数据:”+jedis.flushDB());
      System.out.println(“判断某个键是否存在:”+jedis.exists(“username”));
      System.out.println(“新增<‘username’,‘wukong’>的键值对:”+jedis.set(“username”, “xiaohai”));
      System.out.println(“是否存在:”+jedis.exists(“username”));
      System.out.println(“新增<‘password’,‘password’>的键值对:”+jedis.set(“password”, “123456”));
      //Set keys = jedis.keys("
      ");
      // System.out.println(“系统中所有的键如下:”+keys);
      System.out.println(“删除键password:”+jedis.del(“password”));
      System.out.println(“判断键password是否存在:”+jedis.exists(“password”));
      System.out.println(“设置键username的过期时间为10s:”+jedis.expire(“username”, 10));
      TimeUnit.SECONDS.sleep(2); // 线程睡眠2秒System.out.println(“查看键username的剩余生存时间:”+jedis.ttl(“username”));
      System.out.println(“查看键username的剩余生存时间:”+jedis.ttl(“username”));
      System.out.println(“移除键username的生存时间:”+jedis.persist(“username”));
      System.out.println(“查看键username的剩余生存时间:”+jedis.ttl(“username”));
      System.out.println(“查看键username所存储的值的类型:”+jedis.type(“username”));
      }

    /***

    • 字符串操作

    • memcached和redis同样有append的操作,但是memcached有prepend的操作,redis中并没有。

    • 集群中flushDB、keys、del(多个值)、mset(多个值)废弃

    • @throws InterruptedException
      */
      @Test
      public void testString() throws InterruptedException {
      //jedis.flushDB();
      System.out.println("=增加数据=");
      System.out.println(jedis.set(“key1”,“value1”));
      System.out.println(jedis.set(“key2”,“value2”));
      System.out.println(jedis.set(“key3”, “value3”));
      System.out.println(“删除键key2:”+jedis.del(“key2”));
      System.out.println(“获取键key2:”+jedis.get(“key2”));
      System.out.println(“修改key1:”+jedis.set(“key1”, “value1Changed”));
      System.out.println(“获取key1的值:”+jedis.get(“key1”));
      System.out.println(“在key3后面加入值:”+jedis.append(“key3”, “End”));
      System.out.println(“key3的值:”+jedis.get(“key3”));
      //命令的时候才会去连接连接,集群中连接是对一个节点连接,不能判断多个key经过crc16算法所对应的槽在一个节点上,不支持多key获取、删除
      //System.out.println(“增加多个键值对:”+jedis.mset(“key01”,“value01”,“key02”,“value02”));
      //System.out.println(“获取多个键值对:”+jedis.mget(“key01”,“key02”,“key03”));
      //System.out.println(“获取多个键值对:”+jedis.mget(“key01”,“key02”,“key03”,“key04”));
      //System.out.println(“删除多个键值对:”+jedis.del(new String[]{“key01”,“key02”}));
      //System.out.println(“获取多个键值对:”+jedis.mget(“key01”,“key02”,“key03”));

      //jedis.flushDB();
      System.out.println("=新增键值对防止覆盖原先值====");
      System.out.println(jedis.setnx(“key1”, “value1”));
      System.out.println(jedis.setnx(“key2”, “value2”));
      System.out.println(jedis.setnx(“key2”, “value2-new”));
      System.out.println(jedis.get(“key1”));
      System.out.println(jedis.get(“key2”));

      System.out.println("=新增键值对并设置有效时间===");
      System.out.println(jedis.setex(“key3”, 2, “value3”));
      System.out.println(jedis.get(“key3”));
      TimeUnit.SECONDS.sleep(3);
      System.out.println(jedis.get(“key3”));

      System.out.println("=获取原值,更新为新值");//GETSET is an atomic set this value and return the old value command.
      System.out.println(jedis.getSet(“key2”, “key2GetSet”));
      System.out.println(jedis.get(“key2”));
      System.out.println(“获得key2的值的字串:”+jedis.getrange(“key2”, 2, 4)); // 相当截取字符串的第二个位置-第四个位置的字符串
      }

    /***

    • 整数和浮点数
      */
      @Test
      public void testNumber() {
      jedis.set(“key1”, “1”);
      jedis.set(“key2”, “2”);
      jedis.set(“key3”, “2.3”);
      System.out.println(“key1的值:”+jedis.get(“key1”));
      System.out.println(“key2的值:”+jedis.get(“key2”));
      System.out.println(“key1的值加1:”+jedis.incr(“key1”));
      System.out.println(“获取key1的值:”+jedis.get(“key1”));
      System.out.println(“key2的值减1:”+jedis.decr(“key2”));
      System.out.println(“获取key2的值:”+jedis.get(“key2”));
      System.out.println(“将key1的值加上整数5:”+jedis.incrBy(“key1”, 5));
      System.out.println(“获取key1的值:”+jedis.get(“key1”));
      System.out.println(“将key2的值减去整数5:”+jedis.decrBy(“key2”, 5));
      System.out.println(“获取key2的值:”+jedis.get(“key2”));
      System.out.println(“key3的值:”+jedis.get(“key3”));
      // 这里会报错,因为key3不是整数不能做计算:redis.clients.jedis.exceptions.JedisDataException: ERR value is not an integer or out of range
      // System.out.println(“key2的值减1:”+jedis.decr(“key3”));
      }

    /***

    • 列表
      */
      @Test
      public void testList() {
      System.out.println("=添加一个list=");
      jedis.lpush(“collections”, “ArrayList”, “Vector”, “Stack”, “HashMap”, “WeakHashMap”, “LinkedHashMap”);
      jedis.lpush(“collections”, “HashSet”); // 叠加
      jedis.lpush(“collections”, “TreeSet”); // 叠加
      jedis.lpush(“collections”, “TreeMap”); // 叠加
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));//-1代表倒数第一个元素,-2代表倒数第二个元素
      System.out.println(“collections区间0-3的元素:”+jedis.lrange(“collections”,0,3)); // 前面4个值
      System.out.println("=");
      // 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(“删除指定元素个数:”+jedis.lrem(“collections”, 2, “HashMap”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“删除下表0-3区间之外的元素:”+jedis.ltrim(“collections”, 0, 3));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“collections列表出栈(左端):”+jedis.lpop(“collections”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“collections添加元素,从列表右端,与lpush相对应:”+jedis.rpush(“collections”, “EnumMap”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“collections列表出栈(右端):”+jedis.rpop(“collections”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println(“修改collections指定下标1的内容:”+jedis.lset(“collections”, 1, “LinkedArrayList”));
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      System.out.println("
      =");
      System.out.println(“collections的长度:”+jedis.llen(“collections”));
      System.out.println(“获取collections下标为2的元素:”+jedis.lindex(“collections”, 2));
      System.out.println("===============================");
      jedis.lpush(“sortedList”, “3”,“6”,“2”,“0”,“7”,“4”);
      System.out.println(“sortedList排序前:”+jedis.lrange(“sortedList”, 0, -1));
      System.out.println(jedis.sort(“sortedList”));
      System.out.println(“sortedList排序后:”+jedis.lrange(“sortedList”, 0, -1));
      }

    /***

    • set集合
      */
      @Test
      public void testSet() {
      System.out.println(“向集合中添加元素”);
      System.out.println(jedis.sadd(“eleSet”, “e1”,“e2”,“e4”,“e3”,“e0”,“e8”,“e7”,“e5”));
      System.out.println(jedis.sadd(“eleSet”, “e6”));
      System.out.println(jedis.sadd(“eleSet”, “e6”)); // 返回0,集合中已经存在
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“删除一个元素e0:”+jedis.srem(“eleSet”, “e0”));
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“删除两个元素e7和e6:”+jedis.srem(“eleSet”, “e7”,“e6”));
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“随机的移除集合中的一个元素:”+jedis.spop(“eleSet”));
      System.out.println(“随机的移除集合中的一个元素:”+jedis.spop(“eleSet”));
      System.out.println(“eleSet的所有元素为:”+jedis.smembers(“eleSet”));
      System.out.println(“eleSet中包含元素的个数:”+jedis.scard(“eleSet”));
      System.out.println(“e3是否在eleSet中:”+jedis.sismember(“eleSet”, “e3”));
      System.out.println(“e1是否在eleSet中:”+jedis.sismember(“eleSet”, “e1”));
      System.out.println(“e5是否在eleSet中:”+jedis.sismember(“eleSet”, “e5”));

      // 集群下并存会报错:redis.clients.jedis.exceptions.JedisClusterException: No way to dispatch this command to Redis Cluster because keys have different slots.
      // Redis集群,从key1集合与key2集合并存、交集、差集,两个键经过crc16算法可能有不同的槽。
      /*System.out.println("=================================");
      System.out.println(jedis.sadd(“eleSet1”, “e1”,“e2”,“e4”,“e3”,“e0”,“e8”,“e7”,“e5”));
      System.out.println(jedis.sadd(“eleSet2”, “e1”,“e2”,“e4”,“e3”,“e0”,“e8”));
      System.out.println(“将eleSet1中删除e1并存入eleSet3中:”+jedis.smove(“eleSet1”, “eleSet3”, “e1”));
      System.out.println(“将eleSet1中删除e2并存入eleSet3中:”+jedis.smove(“eleSet1”, “eleSet3”, “e2”));
      System.out.println(“eleSet1中的元素:”+jedis.smembers(“eleSet1”));
      System.out.println(“eleSet3中的元素:”+jedis.smembers(“eleSet3”));*/

      /*System.out.println(“集合运算=====”);
      System.out.println(“eleSet1中的元素:”+jedis.smembers(“eleSet1”));
      System.out.println(“eleSet2中的元素:”+jedis.smembers(“eleSet2”));
      System.out.println(“eleSet1和eleSet2的交集:”+jedis.sinter(“eleSet1”,“eleSet2”));
      System.out.println(“eleSet1和eleSet2的并集:”+jedis.sunion(“eleSet1”,“eleSet2”));
      System.out.println(“eleSet1和eleSet2的差集:”+jedis.sdiff(“eleSet1”,“eleSet2”));*/
      jedis.del(“eleSet”);
      jedis.del(“eleSet1”);
      jedis.del(“eleSet2”);
      jedis.del(“eleSet3”);
      }

    /***

    • 散列
      */
      @Test
      public void testHash() {
      Map<String,String> map = new HashMap<String,String>();
      map.put(“key1”,“value1”);
      map.put(“key2”,“value2”);
      map.put(“key3”,“value3”);
      map.put(“key4”,“value4”);
      jedis.hmset(“hash”,map);
      jedis.hset(“hash”, “key5”, “value5”);
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));//return Map<String,String>
      System.out.println(“散列hash的所有键为:”+jedis.hkeys(“hash”));//return Set
      System.out.println(“散列hash的所有值为:”+jedis.hvals(“hash”));//return List
      System.out.println(“将key6保存的值加上一个整数,如果key6不存在则添加key6:”+jedis.hincrBy(“hash”, “key6”, 6));
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));
      System.out.println(“将key6保存的值加上一个整数,如果key6不存在则添加key6:”+jedis.hincrBy(“hash”, “key6”, 3));
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));
      System.out.println(“删除一个或者多个键值对:”+jedis.hdel(“hash”, “key2”));
      System.out.println(“散列hash的所有键值对为:”+jedis.hgetAll(“hash”));
      System.out.println(“散列hash中键值对的个数:”+jedis.hlen(“hash”));
      System.out.println(“判断hash中是否存在key2:”+jedis.hexists(“hash”,“key2”));
      System.out.println(“判断hash中是否存在key3:”+jedis.hexists(“hash”,“key3”));
      System.out.println(“获取hash中的值:”+jedis.hmget(“hash”,“key3”));
      System.out.println(“获取hash中的值:”+jedis.hmget(“hash”,“key3”,“key4”));
      }

    /**

    • 有序集合
      */
      @Test
      public void testSortedSet() {
      Map<String,Double> map = new HashMap<String,Double>();
      map.put(“key2”,1.2);
      map.put(“key3”,4.0);
      map.put(“key4”,5.0);
      map.put(“key5”,0.2);
      // 将一个或多个 member 元素及其 score 值加入到有序集 key 当中,如果某个 member 已经是有序集的成员,那么更新这个 member 的 score 值
      // score 值可以是整数值或双精度浮点数
      System.out.println(jedis.zadd(“zset”, 3,“key1”));
      System.out.println(jedis.zadd(“zset”,map));
      System.out.println(“zset中的所有元素:”+jedis.zrange(“zset”, 0, -1));
      System.out.println(“zset中的所有元素:”+jedis.zrangeWithScores(“zset”, 0, -1));
      System.out.println(“zset中的所有元素:”+jedis.zrangeByScore(“zset”, 0,100));
      System.out.println(“zset中的所有元素:”+jedis.zrangeByScoreWithScores(“zset”, 0,100));
      System.out.println(“zset中key2的分值:”+jedis.zscore(“zset”, “key2”));
      System.out.println(“zset中key2的排名:”+jedis.zrank(“zset”, “key2”));
      System.out.println(“删除zset中的元素key3:”+jedis.zrem(“zset”, “key3”));
      System.out.println(“zset中的所有元素:”+jedis.zrange(“zset”, 0, -1));
      System.out.println(“zset中元素的个数:”+jedis.zcard(“zset”));
      System.out.println(“zset中分值在1-4之间的元素的个数:”+jedis.zcount(“zset”, 1, 4));
      System.out.println(“key2的分值加上5:”+jedis.zincrby(“zset”, 5, “key2”));
      System.out.println(“key3的分值加上4:”+jedis.zincrby(“zset”, 4, “key3”));
      System.out.println(“zset中的所有元素:”+jedis.zrange(“zset”, 0, -1));
      }

    /**

    • 排序
      /
      @Test
      public void testSort() {
      jedis.lpush(“collections”, “ArrayList”, “Vector”, “Stack”, “HashMap”, “WeakHashMap”, “LinkedHashMap”);
      System.out.println(“collections的内容:”+jedis.lrange(“collections”, 0, -1));
      SortingParams sortingParameters = new SortingParams();
      // 当数据集中保存的是字符串值时,你可以用 ALPHA,默认是升序
      System.out.println(“alpha排序方式:” + jedis.sort(“collections”,sortingParameters.alpha()));
      System.out.println("=");
      jedis.lpush(“sortedList”, “3”,“6”,“2”,“0”,“7”,“4”);
      System.out.println(“sortedList排序前:”+jedis.lrange(“sortedList”, 0, -1));
      System.out.println(“升序:”+jedis.sort(“sortedList”, sortingParameters.asc()));
      System.out.println(“降序:”+jedis.sort(“sortedList”, sortingParameters.desc()));
      System.out.println("
      =");
      // 集群下不支持分割表排序
      /jedis.lpush(“userlist”, “33”);
      jedis.lpush(“userlist”, “22”);
      jedis.lpush(“userlist”, “55”);
      jedis.lpush(“userlist”, “11”);
      jedis.hset(“user:66”, “name”, “66”);
      jedis.hset(“user:55”, “name”, “55”);
      jedis.hset(“user:33”, “name”, “33”);
      jedis.hset(“user:22”, “name”, “79”);
      jedis.hset(“user:11”, “name”, “24”);
      jedis.hset(“user:11”, “add”, “beijing”);
      jedis.hset(“user:22”, “add”, “shanghai”);
      jedis.hset(“user:33”, “add”, “guangzhou”);
      jedis.hset(“user:55”, “add”, “chongqing”);
      jedis.hset(“user:66”, “add”, “xi’an”);
      sortingParameters = new SortingParams();
      // 符号 “->” 用于分割哈希表的键名(key name)和索引域(hash field),格式为 “key->field”
      sortingParameters.get("user:
      ->name");
      sortingParameters.get("user:
      ->add");
      System.out.println(jedis.sort(“userlist”,sortingParameters));*/
      }
      }
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