SpringBoot之——在Spring Boot中使用Redis

转载请注明出处：https://blog.csdn.net/l1028386804/article/details/80958204

1、想要在spring boot中使用redis，需要在pom文件中增加如下的配置。

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-redis</artifactId>
</dependency>

或者：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

2. 引入spring－boot－redis jar包之后，选择相应的客户端配置连接就可以使用redis了，推荐使用Jedis。

@Bean 
JedisConnectionFactory connectionFactory() { 
	return new JedisConnectionFactory(); 
}

3. 配置完连接后，就可以使用redis进行简单的存取了。如果存取的key,value都是String的，可以使用 RedisTemplate<String, String>对象，该对象由spring boot自动扫描生成，在需要的地方可以直接注入。如果只是进行简单的存储，还可以生成 ValueOperations对象来方便操作。

@Bean 
ValueOperations<String, String> strOperations(RedisTemplate<String, String> redisTemplate) { 
	return redisTemplate.opsForValue(); 
}

4. 如果想要存取其他类型的对象，例如存取key为string，value为Integer类型的对象，可以new这个对象，然后配置连接即可使用。

@Bean 
RedisTemplate<String, Integer> intRedisTemplate(JedisConnectionFactory connectionFactory) { 
	RedisTemplate<String, Integer> redisTemplate = new RedisTemplate<String, Integer>(); 
	redisTemplate.setConnectionFactory(connectionFactory); 
	return redisTemplate;
}

5. RedisTemplate对象默认使用jdkSerializer实现序列化，如果想要更换序列化的实现方式，例如使用json实现value的序列化，可以进行如下配置

@Bean 
Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer(ObjectMapper objectMapper) { 
	Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>( Object.class); 
	jackson2JsonRedisSerializer.setObjectMapper(objectMapper); return jackson2JsonRedisSerializer; 
} 
@Bean 
RedisTemplate<String, Object> objRedisTemplate(JedisConnectionFactory connectionFactory, Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer) { 
	RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>(); 
	redisTemplate.setConnectionFactory(connectionFactory); 
	redisTemplate.setDefaultSerializer(jackson2JsonRedisSerializer); 
	StringRedisSerializer stringRedisSerializer = new StringRedisSerializer(); 
	redisTemplate.setKeySerializer(stringRedisSerializer); 
	redisTemplate.setHashKeySerializer(stringRedisSerializer); 
	return redisTemplate; 
}

最后附上上述操作的完整代码

@Configuration 
public class RedisConfig { 
	@Bean 
	JedisConnectionFactory connectionFactory() { 
		return new JedisConnectionFactory(); 
	} 
	@Bean 
	ValueOperations<String, String> strOperations(RedisTemplate<String, String> redisTemplate) { 
		return redisTemplate.opsForValue(); 
	} 
	@Bean 
	RedisTemplate<String, Integer> intRedisTemplate(JedisConnectionFactory connectionFactory) { 
		RedisTemplate<String, Integer> redisTemplate = new RedisTemplate<String, Integer>(); 
		redisTemplate.setConnectionFactory(connectionFactory);
		return redisTemplate;
	} 
	@Bean 
	ValueOperations<String, Integer> intOperations(RedisTemplate<String, Integer> redisTemplate) { 
		return redisTemplate.opsForValue(); 
	} 
	@Bean 
	Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer(ObjectMapper objectMapper) { 
		Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>( Object.class); 
		jackson2JsonRedisSerializer.setObjectMapper(objectMapper); 
		return jackson2JsonRedisSerializer; 
	} 
	@Bean 
	RedisTemplate<String, Object> objRedisTemplate(JedisConnectionFactory connectionFactory, Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer) { 
		RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>(); 
		redisTemplate.setConnectionFactory(connectionFactory); 
		redisTemplate.setDefaultSerializer(jackson2JsonRedisSerializer); 
		StringRedisSerializer stringRedisSerializer = new StringRedisSerializer(); 
		redisTemplate.setKeySerializer(stringRedisSerializer); 
		redisTemplate.setHashKeySerializer(stringRedisSerializer); 
		return redisTemplate; 
	} 
	@Bean 
	ValueOperations<String, Object> objOperations(RedisTemplate<String, Object> redisTemplate) { 
		return redisTemplate.opsForValue(); 
	} 
}

参考文档：

1. http://docs.spring.io/spring-data/redis/docs/current/reference/html/

2. http://docs.spring.io/spring-framework/docs/4.0.4.RELEASE/javadoc-api/org/springframework/context/annotation/Configuration.html

3. http://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/annotation/Bean.html