springboot 缓存 Cacheable 集成redis

水深无声 2022-05-16 02:35 404阅读 0赞

1. 开启缓存注解
    @EnableCaching
    @Configuration
    public class RedisConfig {
    
    	@SuppressWarnings({ "rawtypes", "unchecked" })
    	@Bean
    	public RedisTemplate redisTemplate(RedisConnectionFactory connectionFactory) {
    		RedisTemplate redisTemplate = new RedisTemplate<>();
    		redisTemplate.setConnectionFactory(connectionFactory);
    
    		GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();
    		StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
    		redisTemplate.setKeySerializer(stringRedisSerializer);
    		redisTemplate.setValueSerializer(genericJackson2JsonRedisSerializer);
    		redisTemplate.setHashKeySerializer(stringRedisSerializer);
    		redisTemplate.setHashValueSerializer(genericJackson2JsonRedisSerializer);
    
    		return redisTemplate;
    	}
    
    
    2. 配置缓存使用redis
    	@SuppressWarnings("rawtypes")
    	@Bean
    	public CacheManager cacheManager(RedisTemplate redisTemplate) {
    		RedisCacheManager redisCacheManager = new RedisCacheManager(redisTemplate);
    		redisCacheManager.setDefaultExpiration(10 * 60); //设置缓存失效时间
    
    		return redisCacheManager;
    	}
    }
    
    
    3. 在方法上添加缓存注解
    @Service
    public class CacheService {
        // 添加缓存 ，下次再执行这个方法就从redis缓存中取数据
        //value 是指定业务名称，必须有，key是缓存key的名称 #name 表示是参数的name 
    	@Cacheable(value = "names", key = "'names:' + #name") 
    	public Hello hello(String name) {
    		// select * from *** where name = ?
    		Hello hello = new Hello();
    		hello.setName(name);
    		System.out.println("我被执行了：name=" + name);
    
    		return hello;
    	}
    
        //更新缓存 ，每次都会执行，更新数据到缓存中
    	@CachePut(value = "names", key = "'names:' + #name")
    	public Hello update(String name) {
    		Hello hello = new Hello();
    		hello.setName(name + "update");
    		System.out.println("我被执行了update：name=" + name);
    
    		return hello;
    	}
    
        //删除缓存
    	@CacheEvict(value = "names", key = "'names:' + #name")
    	public Hello delete(String name) {
    		Hello hello = new Hello();
    		hello.setName(name + "delete");
    		System.out.println("我被执行了delete：name=" + name);
    
    		return hello;
    	}
    }