SpringBoot 配置redis集群

导入依赖

<!--Springboot集成 Redis ，Springboot2.x默认是用Lettuce连接redis，Lettuce可伸缩，线程安全-->
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

配置applcation.yml

# redis 配置
redis:
  server:
    pattern: cluster
    nodes: 127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002,127.0.0.1:3003,127.0.0.1:3004,127.0.0.1:3005
    password:
    maxIdle: 8
    minIdle: 4
    maxTotal: 8
    maxWaitMillis: 6000
    timeOut: 6000

方式一：redis（存储各种对象）

@Configuration
public class RedisConfig {
    @Value("${redis.server.nodes}")
    private String redisServerNodes;
 
    @Value("${redis.server.password}")
    private String redisServerPassword;
 
    @Bean
    public RedisClusterConfiguration getRedisClusterConfiguration() {
 
        RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();
 
        String[] serverArray = redisServerNodes.split(",");
        Set<RedisNode> nodes = new HashSet<RedisNode>();
        for (String ipPort : serverArray) {
            String[] ipAndPort = ipPort.split(":");
            nodes.add(new RedisNode(ipAndPort[0].trim(), Integer.parseInt(ipAndPort[1])));
        }
        redisClusterConfiguration.setClusterNodes(nodes);
        RedisPassword pwd = RedisPassword.of(redisServerPassword);
        redisClusterConfiguration.setPassword(pwd);
        return redisClusterConfiguration;
    }
 
    //指定redisTemplate类型，如下为<String, Object>
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Object> template = new RedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        // 使用JSON格式序列化对象，对缓存数据key和value进行转换
        Jackson2JsonRedisSerializer<Object> jacksonSeial = new Jackson2JsonRedisSerializer<>(Object.class);
        // 解决查询缓存转换异常的问题
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jacksonSeial.setObjectMapper(objectMapper);
 
        // 设置RedisTemplate模板API的序列化方式为JSON
        template.setDefaultSerializer(jacksonSeial);
        return template;
    }
}

//1.指定存储类型
@Autowired
private RedisTemplate<String,String> redisTemplate;
//2.未指定存储类型
@Autowired
private RedisTemplate redisTemplate;
 
//存储
redisTemplate.opsForValue().set(keyName, valueObject, Duration.ofXXX(n));
//Duration.ofNanos() 纳秒
//Duration.ofMillis() 毫秒
//Duration.ofSeconds() 秒
//Duration.ofMinutes() 分钟
//Duration.ofHours() 小时
//Duration.ofDays() 天
 
//查询
redisTemplate.opsForValue().get(keyName);
 

方式二：redission （常用于储存分布式锁）

@Configuration
public class RedissonConfig {
 
    @Value("${redis.server.pattern:single}")
    private String pattern;
 
    @Value("${redis.server.host:127.0.0.1}")
    private String host;
 
    @Value("${redis.server.nodes:1}")
    private List<String> nodes;
 
    @Value("${redis.server.port:6379}")
    private String port;
 
    @Value("${redis.server.password}")
    private String password;
 
    @Value("${redis.server.database:1}")
    private Integer database;
 
 
    @Bean
    @ConditionalOnProperty(prefix = "redis.server", name = "pattern", havingValue = "cluster")
    public RedissonClient clusterRedisClient() {
        Config config = new Config();
        ClusterServersConfig clusterServersConfig = config.useClusterServers();
 
        if (!StringUtils.isBlank(password)) {
            clusterServersConfig.setPassword(password);
        }
        // 集群状态扫描间隔时间，单位是毫秒
        clusterServersConfig.setScanInterval(2000);
        for (String node : nodes) {
            String url = "redis://" + node;
            clusterServersConfig.addNodeAddress(url);
        }
        RedissonClient redissonClient = Redisson.create(config);
 
        return redissonClient;
    }
 
 
    @Bean
    @ConditionalOnProperty(prefix = "redis.server", name = "pattern", havingValue = "single")
    public RedissonClient singleRedisClient() {
        Config config = new Config();
        SingleServerConfig singleServerConfig = config.useSingleServer();
 
        if (!StringUtils.isBlank(password)) {
            singleServerConfig.setPassword(password);
        }
        String url = "redis://" + host + ":" + port;
        singleServerConfig.setAddress(url);
        singleServerConfig.setDatabase(database);
        RedissonClient redissonClient = Redisson.create(config);
 
        return redissonClient;
    }
}

//锁工具封装
public class RedissionLockTools{ 
   
    @Autowired
    private static RedissonClient redissonClient;
    
    //加锁
    public static boolean lock(String lockName){
        //声明key对象
        String key = "LOCK_TITLE" + lockName;
        //获取锁对象
        RLock mylock = redissonClient.getLock(key);
        //加锁，并且设置锁过期时间3秒，防止死锁的产生  uuid+threadId
        mylock.lock(3, TimeUnit.SECONDS);
        //加锁成功
        return  true;
    }
 
    //锁的释放
    public static void unlock(String lockName) {
        //必须是和加锁时的同一个key
        String key = "LOCK_TITLE" + lockName;
        //获取所对象
        RLock mylock = redissonClient.getLock(key);
        //释放锁（解锁）
        mylock.unlock();
    }
}

public Object getUserById(User user) throws IOException{
    String lockName = "lockName01";
    //加锁
    RedissionLockTools.lock(lockName);
    //执行具体业务逻辑
    //～～～～～～～
    //执行具体业务逻辑
    //释放锁
    RedissionLockTools.unlock(lockName);
    //返回结果
    return result;
 }

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