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springboot2.x集成redis(lettuce)

程序员文章站 2022-07-07 11:26:44
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pom.xml

	  <!--reids集成-->
	  <dependency>
	      <groupId>org.springframework.boot</groupId>
	      <artifactId>spring-boot-starter-data-redis</artifactId>
	  </dependency>
	  <dependency>
	      <groupId>org.apache.commons</groupId>
	      <artifactId>commons-pool2</artifactId>
	  </dependency>

properties配置

#数据库索引 默认0
spring.redis.database=0
#redis服务器地址
spring.redis.host=127.0.0.1
#redis服务器端口
spring.redis.port=6379
#redis服务器连接密码
spring.redis.password=XXX
#连接池最大连接数(使用负数表示没有限制) 默认8
spring.redis.lettuce.pool.max-active=8
#连接池最大阻塞等待时间 默认没有限制 -1
spring.redis.lettuce.pool.max-wait=-1
#连接池中最大空闲连接 默认8
spring.redis.lettuce.pool.max-idle=8
#连接池中最小空闲连接 默认0
spring.redis.lettuce.pool.min-idle=0

redisTemplate配置,重写key、value序列化

@Configuration
@EnableCaching // 支持缓存
public class RedisConfig extends CachingConfigurerSupport {

    @Bean
    public RedisCacheManager redisCacheManager(RedisTemplate redisTemplate) {
        // 初始化一个RedisCacheWriter
        RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisTemplate.getConnectionFactory());
        // 设置默认过期时间30M
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(redisTemplate.getValueSerializer()))
                .entryTtl(Duration.ofMinutes(30L))
                .disableCachingNullValues();
        // 初始化RedisCacheManager
        RedisCacheManager redisCacheManager = new RedisCacheManager(redisCacheWriter, redisCacheConfiguration);
        return redisCacheManager;
    }


    /**
     * retemplate相关配置
     * springboot2.x 之后默认使用lettuce客户端连接(线程安全)
     *
     * @param factory
     * @return
     */
    @Bean(name = "redisTemplate")
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {

        RedisTemplate<String, Object> template = new RedisTemplate<>();
        // 配置连接工厂
        template.setConnectionFactory(factory);
        //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值(默认使用JDK的序列化方式)
        Jackson2JsonRedisSerializer jacksonSeial = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        // 指定要序列化的域,field,get和set,以及修饰符范围,ANY是都有包括private和public
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 指定序列化输入的类型,类必须是非final修饰的,final修饰的类,比如String,Integer等会跑出异常
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jacksonSeial.setObjectMapper(om);
        // 值采用json序列化
        template.setValueSerializer(jacksonSeial);
        //使用StringRedisSerializer来序列化和反序列化redis的key值
        template.setKeySerializer(new StringRedisSerializer());
        // 设置hash key 和value序列化模式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(jacksonSeial);
        template.afterPropertiesSet();
        return template;
    }


    /**
     * 对hash类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public HashOperations<String, String, Object> hashOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForHash();
    }

    /**
     * 对redis字符串类型数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ValueOperations<String, Object> valueOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForValue();
    }

    /**
     * 对链表类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ListOperations<String, Object> listOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForList();
    }

    /**
     * 对无序集合类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public SetOperations<String, Object> setOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForSet();
    }

    /**
     * 对有序集合类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ZSetOperations<String, Object> zSetOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForZSet();
    }
}

调用示例1(注解):

    @Cacheable(value = "listXxx", key = "#key")
    public List<String> listXxx(String key) {
        System.out.println("执行了listXxx方法");
        return Arrays.asList("xxx", "yyy", System.currentTimeMillis() + "");
    }

调用示例2:

   @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 获取数据
     * @param key
     * @param field
     * @return
     */
    public String getRedisHash(String key, String field) {
        HashOperations<String, String, String> hash = redisTemplate.opsForHash();
        if (StringUtils.isEmpty(key)) {
            return "";
        }
        String value = StringUtils.isEmpty(field) ? hash.get(key, key) : hash.get(key, field);
        return (StringUtils.isEmpty(value) || "[]".equals(value)) ? "" : value;
    }

    /**
     * redis缓存,只适用hash类型存储
     * 默认缓存永久
     *
     * @param key   redis 键
     * @param field hash 键
     * @param value 所缓存的数据
     */
    public void setRedisHash(String key, String field, String value) {
        //redis hash 对象,用来存储数据
        HashOperations<String, String, String> hash = redisTemplate.opsForHash();
        if (StringUtils.isEmpty(field)) {
            hash.put(key, key, value);
        } else {
            hash.put(key, field, value);
        }
    }
相关标签: redis redis