SpringBoot Redis 2.0.x

• redis的安装
  
  在笔者之前的文章中有介绍redis的安装，不会的可以去看 笔者之前写的文章redis安装
• 完成安装后如果不熟悉redis的操作，redis官方文档也有基本操作指南，redis基本操作,如果觉得没问题了就可以开始对redis的整合

1. maven安装依赖

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

redis自动会吧cache的依赖带过来，所有不用配置，如图

1. 启动类增加@EnableCaching 注解

@SpringBootApplication
@MapperScan("com.tanoak.mapper")
@EnableCaching
public class BootRedisApplication {
	public static void main(String[] args) {
		SpringApplication.run(BootRedisApplication.class, args);
	}
}

1. service层增加@Cacheable 注解

@Override
	@Cacheable(cacheNames= "tea")
	public Teacher getTeaById(Integer id) {
		logger.info("进行查询实体 ID为"+id);
		return teacherMapper.getTeaById(id) ;
	}

1. controller 查询

@GetMapping("/tea/{id}")
public Teacher getTea(@PathVariable("id")Integer id){
		return	teacherService.getTeaById(id) ;
	}

RedisCacheManager 配置

在SpringBoot2.x中，移除了1.x中的配置，因此要配置Json序列化与1.x的差别很大，看代码

@Configuration
@EnableCaching
public class MyRedisConfig extends CachingConfigurerSupport {

    /*
    *自定义键生成策略
    */
	@Bean
	public KeyGenerator KeyGenerator() {
		return (target, method, params) -> {
			StringBuilder sb = new StringBuilder();
			sb.append(target.getClass().getName());
			sb.append(method.getName());
			for (Object obj : params) {
				sb.append(obj.toString());
			}
			return sb.toString();
		};
	}

	@Bean
	public RedisCacheConfiguration redisCacheConfiguration() {
		Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
		ObjectMapper om = new ObjectMapper();
		om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
		om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
		jackson2JsonRedisSerializer.setObjectMapper(om);
		RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
		redisCacheConfiguration = redisCacheConfiguration.serializeValuesWith(
				RedisSerializationContext
						.SerializationPair
						.fromSerializer(jackson2JsonRedisSerializer)
				//设置默认超过期时间是30秒
		).entryTtl(Duration.ofMinutes(30));

		return redisCacheConfiguration;
	}

}

没有打印sql，说明缓存成功，与redis集成就完成了