1、Jedis客戶端出現的異常資訊

Exception in thread "main" redis.clients.jedis.exceptions.JedisDataException: 
    DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 
    1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 
   2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 
   3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

 

       2.1 在redis伺服器，設定訪問密碼

[[email protected] redis-3.2.1]# redis-cli  
127.0.0.1:6379> config set requirepass 123456  
OK  
127.0.0.1:6379>  

       2.2 在Jedis客戶端，加入訪問密碼

// 設定連線密碼
    jedis.auth("123456");

2.3 使用密碼登入redis客戶端

$ ./redis-cli -h 127.0.0.1 -p 6379 -a 123456

import redis.clients.jedis.Jedis;
public class JedisDemo {

	public static void main(String[] args) {
		// 主機地址
		String host = "192.168.2.111";
		// 構造jedis物件
		Jedis jedis = new Jedis(host, 6379);
		// 設定連線密碼
		jedis.auth("123456");
		// 向redis中新增資料
		jedis.set("mytest", "123");
		// 從redis中讀取資料
		String value = jedis.get("mytest");

		System.out.println(value);
		// 關閉連線
		jedis.close();
	}
}
 

4、JedisPool的配置和使用

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

public class JedisPoolDemo {

	public static void main(String[] args) {
		// 主機地址
		String host = "192.168.2.105";
		// 構建連線池配置資訊
		JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
		// 設定最大連線數
		jedisPoolConfig.setMaxTotal(50);
		// 超時時間
		int timeout = 10000;
		// 授權密碼
		String password = "123456";
		// 構建連線池
		JedisPool jedisPool = new JedisPool(jedisPoolConfig, host, 6379,
				timeout, password);
		// 從連線池中獲取連線
		Jedis jedis = jedisPool.getResource();
		// 設定訪問密碼
		// 讀取資料
		System.out.println(jedis.get("mytest"));

		// 將連線還回到連線池中
		jedisPool.returnResource(jedis);

		// 釋放連線池
		jedisPool.close();

	}
}
 

5、ShardedJedisPool的配置和使用

import java.util.ArrayList;
import java.util.List;

import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.JedisShardInfo;
import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;

/**
 * 叢集式的連線池
 * 
 */
public class ShardedJedisPoolDemo {

	public static void main(String[] args) {
		// 構建連線池配置資訊
		JedisPoolConfig poolConfig = new JedisPoolConfig();
		// 設定最大連線數
		poolConfig.setMaxTotal(50);
		// 定義叢集資訊
		List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>();

		// 定義A節點資訊
		JedisShardInfo infoA = new JedisShardInfo("192.168.2.111", 6379);
		// 設定A節點的訪問密碼
		infoA.setPassword("123456");
		// 定義B節點資訊
		JedisShardInfo infoB = new JedisShardInfo("192.168.2.116", 6379);
		// 設定B節點的訪問密碼
		infoB.setPassword("123456");

		// 加入叢集節點
		shards.add(infoA);
		shards.add(infoB);
		// 定義叢集連線池
		ShardedJedisPool shardedJedisPool = new ShardedJedisPool(poolConfig,
				shards);
		ShardedJedis shardedJedis = null;
		try {
			// 從連線池中獲取到jedis分片物件
			shardedJedis = shardedJedisPool.getResource();
			for (int i = 0; i < 100; i++) {
				shardedJedis.set("key" + i, "value" + i);
			}

			// 從redis中獲取資料
			String value = shardedJedis.get("mytest");
			System.out.println(value);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (null != shardedJedis) {
				// 關閉，檢測連線是否有效，有效則放回到連線池中，無效則重置狀態
				shardedJedis.close();
			}
		}

		// 關閉連線池
		shardedJedisPool.close();

	}
}

6、原始碼下載