springboot+redis

本文只有redis的相关配置：

1、springboot整合redis的maven坐标

<!-- spring-boot-redis -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- 缓存连接池 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>
<!-- redis存储json序列化 -->
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <version>2.3.4.RELEASE</version>
</dependency>

2、yml配置

spring:
  redis:
    host: 127.0.0.1
    port: 6379
    database: 0
    timeout: 3000ms #最大等待时间,超时抛异常,否则请求一直等待
    lettuce:
      pool:
        max-active: 20 #最大连接数 负值表示没有限制  默认8
        max-wait: -1  #最大阻塞等待时间 负值表示没有限制  默认-1
        max-idle: 8 #最大空闲连接 默认8
        min-idle: 0 #最小空闲连接 默认0

3、redis配置类

@Configuration
public class RedisConfig {

    /**
     * 配置Lettuce连接池对象
     * @param redisConnectionFactory
     * @return
     */
    @Bean
    public RedisTemplate<String,Object> redisTemplate(LettuceConnectionFactory redisConnectionFactory){
        RedisTemplate<String,Object> redisTemplate = new RedisTemplate<String,Object>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        //序列化
        //1、key进行序列化
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringRedisSerializer);
        //2、value进行json序列化
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
        //2.1、解决jackson2无法反序列化LocalDateTime的问题
        ObjectMapper objectMapper = new ObjectMapper();
        //将当前对象的类型也存入序列化的结果字符串中
        objectMapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL);
        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper.registerModule(new JavaTimeModule());
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        return redisTemplate;
    }
}

4、测试类

@Slf4j
@SpringBootTest
@RunWith(SpringRunner.class)
public class RedisTemplateTest {

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private DictMapper dictMapper;

    @Test
    public void saveDict(){
        Dict dict = dictMapper.selectById(1);
        //opsForValue存字符串
        redisTemplate.opsForValue().set("dict",dict,5,TimeUnit.MINUTES);
        log.info("SET SUCCESS");
    }

    @Test
    public void getDict(){
        Dict dict = (Dict)redisTemplate.opsForValue().get("dict");
        log.info("dict=> {}",dict);
    }
}