Redis随笔 Jedis、jedisCluster的使用

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

复制代码

redis.clients
jedis
2.9.0
jar
compile

复制代码
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
复制代码
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));*/
    }
    }

标签：jedisCluster,key2,Redis,System,collections,Jedis,println,jedis,out
来源： https://blog.csdn.net/weixin_39696932/article/details/122862877