springboot整合redis

第一步：导入依赖

 <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-redisartifactId>
        dependency>

第二步在springboot 的主程序类上添加如下

//扫描mybatis
@MapperScan(value = "com.aaa.cache.mapper")
@SpringBootApplication
//开启缓存
@EnableCaching
public class SpringBootCacheApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootCacheApplication.class, args);
    }

}

第三步：

@CacheConfig(cacheNames = "emp",cacheManager = "redisCacheManager")
@Service
public class EmployyService {
    @Autowired
    EmployyMapper employyMapper;
    /**
     *
     * 根据方法的请求参数对其结果进行缓存
     *  CacheManager管理多个Cache组件，对缓存的真正CRUD操做在cache中，每一个缓存组件都有一个唯一的名称
     * value：指定缓存的名称
     *
     * */
    @Cacheable
    public Employee getEmp(Integer id){
        Employee employee = employyMapper.getEmployee(id);
        return  employee;
    }
}

第四步：自定义redis的缓存管理器(第一种方式)

@Configuration
public class RedisConfig {


    @Bean
    public RedisCacheManager redisCacheManager (RedisConnectionFactory redisConnectionFactory){
    //初始化一个redisCacheWriter
        RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory);
        //初始化序列化方式为json;
        RedisSerializer redisSerializer = new GenericJackson2JsonRedisSerializer();
        //从序列器中获取fromSerializer（序列）
        RedisSerializationContext.SerializationPair pair =
                RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer);

        RedisSerializationContext.SerializationPair<String> stringSerializationPair =
                RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer());
        //设置默认的缓存配置为我们上述的序列化配置
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .serializeValuesWith(pair)
                .serializeKeysWith(stringSerializationPair);

         // 设置过期时间
        // redisCacheConfiguration.entryTtl(Duration.ofSeconds(10));
        //禁止缓存null对象
        //redisCacheConfiguration.disableCachingNullValues();
        return new RedisCacheManager(redisCacheWriter,redisCacheConfiguration);
    }

第二种方式

@Configuration
public class RedisConfig {
/*  @Bean
    public RedisTemplate employeeRedisTemplate(RedisConnectionFactory redisConnectionFactory)
            throws UnknownHostException {
        RedisTemplate template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);

       //Json序列化设置
        Jackson2JsonRedisSerializer