springboot源码解析-管中窥豹系列之自动装配（九） (3)

我们看看RedisAutoConfiguration

import org.springframework.data.redis.core.RedisOperations; @Configuration(proxyBeanMethods = false) @ConditionalOnClass(RedisOperations.class) @EnableConfigurationProperties(RedisProperties.class) @Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class }) public class RedisAutoConfiguration { @Bean @ConditionalOnMissingBean(name = "redisTemplate") public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException { RedisTemplate<Object, Object> template = new RedisTemplate<>(); template.setConnectionFactory(redisConnectionFactory); return template; } @Bean @ConditionalOnMissingBean public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException { StringRedisTemplate template = new StringRedisTemplate(); template.setConnectionFactory(redisConnectionFactory); return template; } }

@EnableConfigurationProperties(RedisProperties.class)是加载配置的

@ConditionalOnClass(RedisOperations.class)是另一个开关，必须存在RedisOperations这个类