In Spring boot 2.x use redis

First, add the Maven Dependencies

　　　　 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>2.1.3.RELEASE</version>
        </dependency>

Two .application.yml configure redis configuration

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/order?serverTimezone=GMT%2B8&characterEncoding=UTF-8
    username: root
    password: xxxxxx
  redis:
    host: ip
    database: 0
    port: 6379
    password:

jdbc4.0 is not explicit to load the driver, if the driver package in line with SPI mode will automatically load 
means that the program will automatically go to find out if there is a project-driven, of course, if there is no natural drive is not connected

Third, write a configuration class redis

The default is to use the JDK redis serialized manner.

JdkSerializationRedisSerializer

After saving the entity, the entity information garbled in Redis, redis need to modify the default serialization, configuration files created RedisConfig

@Configuration
public class RedisConfig {

    //设置过期时间
    public static Duration liveTime = Duration.ofDays(1);

    @Bean
    public RedisCacheManager redisCacheManager(RedisConnectionFactory connectionFactory){
        RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig().entryTtl(liveTime)
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()))
                .disableCachingNullValues();
        RedisCacheManager redisCacheManager = RedisCacheManager.builder(connectionFactory)
                .cacheDefaults(cacheConfiguration).transactionAware().build();
        return redisCacheManager;
    }


    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
        RedisTemplate<String, Object> template = new RedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);

        //细化序列化
        template.setKeySerializer(new StringRedisSerializer());
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        template.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());

        //修改默认序列化器
       /* Jackson2JsonRedisSerializer serializer = new Jackson2JsonRedisSerializer(Object.class);
        template.setDefaultSerializer(serializer);*/
        return template;
    }

}

View Code

Fourth, the use of annotations ways to use Redis

@Service
public class EmpService {

    @Autowired
    private EmpMapper empMapper;

    @Cacheable(cacheNames = {"emp"})
    public Emp getEnp(int id){
        return empMapper.getEmpById(id);
    }

    @CachePut
    public int insertEmp(Emp emp){
        return empMapper.insertEmp(emp);
    }


    @CacheEvict(beforeInvocation = false,value = "emp")
    public int delEmp(int id){
         empMapper.delEmp(id);
         return 1;
    }

    @CachePut(key = "#p0.id",value = "emp")
    public Emp updateEmp(Emp emp){
        empMapper.updateEmp(emp);
        return emp;
    }

}