Java は複数の Redis インスタンスを接続し、書き込みメソッドと削除メソッドを実装します。

依存パッケージ

<dependency> 
    <groupId>redis.clients</groupId> 
    <artifactId>jedis</artifactId> 
    <version>3.2.0</version> 
</dependency>

 

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

import javax.annotation.PostConstruct;

@Component
public class RedisUtils {
    
    private static JedisPool[] jedisPools;

    @Value("${redis.host}")
    private String host;

    @Value("${redis.password}")
    private String password;

    @Value("${redis.port}")
    private String port;

    @Value("${redis.maxInst}")
    private Integer maxInst;

    @Value("${redis.maxIdle}")
    private Integer maxIdle;

    @Value("${redis.maxWait}")
    private Integer maxWait;

    @Value("${redis.timeout}")
    private Integer timeout;
    
    @PostConstruct
    public void init() {
        createJedisPools();
    }

    private void createJedisPools() {
        String[] hosts = host.split(",");
        String[] ports = port.split(",");
        String[] passwords = password.split(",");
        jedisPools = new JedisPool[hosts.length];
        JedisPoolConfig config = new JedisPoolConfig();
        for (int i = 0; i < hosts.length; i++) {
            if (passwords != null && i < passwords.length && passwords[i] != null) {
                jedisPools[i] = new JedisPool(config, hosts[i], Integer.parseInt(ports[i]), timeout, passwords[i]);
            } else {
                jedisPools[i] = new JedisPool(config, hosts[i], Integer.parseInt(ports[i]),timeout);
            }
        }
    }

    
    /**
     * 获取Redis连接
     * @param index Redis实例的索引号
     * @return Redis连接
     */
    public static Jedis getJedis(int index) {
        return jedisPools[index].getResource();
    }
    
    /**
     * 写入数据
     * @param index Redis实例的索引号
     * @param key 键
     * @param value 值
     * @return 写入是否成功
     */
    public static boolean set(int index, String key, String value) {
        Jedis jedis = null;
        try {
            jedis = getJedis(index);
            jedis.set(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        } finally {
            if (jedis != null) {
                jedis.close();
            }
        }
    }
    
    /**
     * 删除数据
     * @param index Redis实例的索引号
     * @param key 键
     * @return 删除的记录数
     */
    public static long del(int index, String key) {
        Jedis jedis = null;
        try {
            jedis = getJedis(index);
            return jedis.del(key);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        } finally {
            if (jedis != null) {
                jedis.close();
            }
        }
    }
	
	public static boolean set(String key, String value) {
		boolean success = true;
        //RedisUtils.createJedisPools();
		for (JedisPool pool : jedisPools) {
			Jedis jedis = null;
			try {
				jedis = pool.getResource();
				jedis.set(key, value);
			} catch (Exception e) {
				e.printStackTrace();
				success = false;
			} finally {
				if (jedis != null) {
					jedis.close();
				}
			}
		}
		return success;
	}

	public static long del(String key) {
		long total = 0;
		for (JedisPool pool : jedisPools) {
			Jedis jedis = null;
			try {
				jedis = pool.getResource();
				total += jedis.del(key);
			} catch (Exception e) {
				e.printStackTrace();
			} finally {
				if (jedis != null) {
					jedis.close();
				}
			}
		}
		return total;
	}

}