Redis在java中的使用

1.Redis Windows安装　

下载链接：https://github.com/dmajkic/redis/downloads

根据自己的需要选择32位，64位的redis，然后存到一个指定的目录，比如：F:Redis

① 打开cmd ,进入F:Redis

② 执行redis-server.exe redis.conf

③ 另外重新开一个cmd，执行redis-cli.exe -h 127.0.0.1 -p 6379

④ 测试：set mykey li

get mykey

可以得到"li"，说明服务已打开。

2.在java中的使用

使用Java操作Redis需要jedis-2.1.0.jar，下载地址：http://files.cnblogs.com/liuling/jedis-2.1.0.jar.zip

如果需要使用Redis连接池的话，还需commons-pool-1.5.4.jar，下载地址:http://files.cnblogs.com/liuling/commons-pool-1.5.4.jar.zip

package com.redis.test;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.JedisShardInfo;
import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;
import redis.clients.jedis.SortingParams;

public class RedisClient {
    
    private Jedis jedis;//非切片额客户端连接
    private JedisPool jedisPool;//非切片连接池
    private ShardedJedis shardedJedis;//切片额客户端连接
    private ShardedJedisPool shardedJedisPool;//切片连接池
    
    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 
        JedisPoolConfig config = new JedisPoolConfig(); 
        config.setMaxActive(20); 
        config.setMaxIdle(5); 
        config.setMaxWait(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.setMaxActive(20); 
        config.setMaxIdle(5); 
        config.setMaxWait(1000l); 
        config.setTestOnBorrow(false); 
        // slave链接 
        List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>(); 
        shards.add(new JedisShardInfo("127.0.0.1", 6379, "master")); 

        // 构造池 
        shardedJedisPool = new ShardedJedisPool(config, shards); 
    } 

    public void show() {     
        KeyOperate(); 
        StringOperate(); 
        ListOperate(); 
        SetOperate();
        SortedSetOperate();
        HashOperate(); 
        jedisPool.returnResource(jedis);
        shardedJedisPool.returnResource(shardedJedis);
    } 

      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)
           */
      }

      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));
      }

      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)+"
");
      }

      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
      }

      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));

      }
    
      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();
                
      }
}

测试：

public class Main {
    public static void main(String[] args) {
        new RedisClient().show(); 
    }
}