Maven的依赖导入

<!-- https://mvnrepository.com/artifact/commons-pool/commons-pool -->
<dependency>
    <groupId>commons-pool</groupId>
    <artifactId>commons-pool</artifactId>
    <version>1.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.1.0</version>
</dependency>

先玩一玩 五大数据类型

public class Test
{
  public static void main(String[] args) 
  {


     Jedis jedis = new Jedis("127.0.0.1",6379);
     //key
     Set<String> keys = jedis.keys("*");
     for (Iterator iterator = keys.iterator(); iterator.hasNext();) {
       String key = (String) iterator.next();
       System.out.println(key);
     }
     System.out.println("jedis.exists====>"+jedis.exists("k2"));
     System.out.println(jedis.ttl("k1"));
     //String
     //jedis.append("k1","myreids");
     System.out.println(jedis.get("k1"));
     jedis.set("k4","k4_redis");
     System.out.println("----------------------------------------");
     jedis.mset("str1","v1","str2","v2","str3","v3");
     System.out.println(jedis.mget("str1","str2","str3"));
     //list
     System.out.println("----------------------------------------");
     //jedis.lpush("mylist","v1","v2","v3","v4","v5");
     List<String> list = jedis.lrange("mylist",0,-1);
     for (String element : list) {
       System.out.println(element);
     }
     //set
     jedis.sadd("orders","jd001");
     jedis.sadd("orders","jd002");
     jedis.sadd("orders","jd003");
     Set<String> set1 = jedis.smembers("orders");
     for (Iterator iterator = set1.iterator(); iterator.hasNext();) {
       String string = (String) iterator.next();
       System.out.println(string);
     }
     jedis.srem("orders","jd002");
     System.out.println(jedis.smembers("orders").size());
     //hash
     jedis.hset("hash1","userName","lisi");
     System.out.println(jedis.hget("hash1","userName"));
     Map<String,String> map = new HashMap<String,String>();
     map.put("telphone","13811814763");
     map.put("address","atguigu");
     map.put("email","[email protected]");
     jedis.hmset("hash2",map);
     List<String> result = jedis.hmget("hash2", "telphone","email");
     for (String element : result) {
       System.out.println(element);
     }
     //zset
     jedis.zadd("zset01",60d,"v1");
     jedis.zadd("zset01",70d,"v2");
     jedis.zadd("zset01",80d,"v3");
     jedis.zadd("zset01",90d,"v4");
     
     Set<String> s1 = jedis.zrange("zset01",0,-1);
     for (Iterator iterator = s1.iterator(); iterator.hasNext();) {
       String string = (String) iterator.next();
       System.out.println(string);
     }     
  }
}

Redis的事务

通俗点讲，watch命令就是标记一个键，如果标记了一个键， 在提交事务前如果该键被别人修改过，那事务就会失败，这种情况通常可以在程序中重新再尝试一次。首先标记了键balance，然后检查余额是否足够，不足就取消标记，并不做扣减； 足够的话，就启动事务进行更新操作，如果在此期间键balance被其它人修改， 那在提交事务（执行exec）时就会报错， 程序中通常可以捕获这类错误再重新执行一次，直到成功。

 public boolean transMethod() {
     Jedis jedis = new Jedis("127.0.0.1", 6379);
     int balance;// 可用余额
     int debt;// 欠额
     int amtToSubtract = 10;// 实刷额度
     jedis.watch("balance");
     //Thread.sleep(8000); 停止程序一小段时间，外面先修改balance数据后看效果
     balance = Integer.parseInt(jedis.get("balance"));
     if (balance < amtToSubtract) {
       jedis.unwatch();
       System.out.println("modify");
       return false;
     } else {
       System.out.println("***********transaction");
       Transaction transaction = jedis.multi();
       transaction.decrBy("balance", amtToSubtract);
       transaction.incrBy("debt", amtToSubtract);
       transaction.exec();
       balance = Integer.parseInt(jedis.get("balance"));
       debt = Integer.parseInt(jedis.get("debt"));
       System.out.println("*******" + balance);
       System.out.println("*******" + debt);
       return true;
     }
  }

Redis主从复制（主写从读）

public static void main(String[] args) throws InterruptedException 
  {
     Jedis jedis_M = new Jedis("127.0.0.1",6379);
     Jedis jedis_S = new Jedis("127.0.0.1",6380);
     
     jedis_S.slaveof("127.0.0.1",6379);
     
     jedis_M.set("k6","v6");
     Thread.sleep(500);
     System.out.println(jedis_S.get("k6"));
  }