SpringBoot2整合Redis缓存三步骤代码详解

遵循SpringBoot三板斧

第一步加依赖

  org.springframework.boot
  spring-boot-starter-data-redis



  org.apache.commons
  commons-pool2
  2.6.0

第二步写注解

@EnableCaching//开启缓存支持

第三步写配置

spring:
 redis:
  database: 0
  host: 192.168.1.11
  port: 6379
  password:
  timeout: 600
  lettuce:
   pool:
    max-active: 50
    max-wait: -1
    max-idle: 8
    min-idle: 0

编写Redis配置类

@Slf4j
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {

  @Value("${sys.dataCaching.expireTime:0}")
  private int expireTime;

  @Resource
  private LettuceConnectionFactory lettuceConnectionFactory;

  @Override
  @Bean
  public KeyGenerator keyGenerator() {//设置自定义key{ClassName + methodName + params}
    return (target, method, params) -> {
      StringBuilder sb = new StringBuilder();
      sb.append(target.getClass().getName());
      sb.append(",Method:");
      sb.append(method.getName());
      sb.append(",Params[");
      for (int i = 0; i < params.length; i++) {
 sb.append(params[i].toString());
 if (i != (params.length - 1)) {
   sb.append(",");
 }
      }
      sb.append("]");
      log.debug("Data Caching Redis Key : {}", sb.toString());
      return sb.toString();
    };
  }
  //自定义keyGenerator，Key生成器
  @Bean
  public KeyGenerator updateByIdkeyGenerator() {
    return (target, method, params) -> {
      StringBuilder sb = new StringBuilder();
      sb.append(target.getClass().getName());
      sb.append(",Method:");
      sb.append("getById");
      sb.append(",Params[");
      try {
 Field id = params[0].getClass().getDeclaredField("id");
 id.setAccessible(true);
 sb.append(id.get(params[0]).toString());
      } catch (IllegalAccessException e) {
 e.printStackTrace();
      } catch (NoSuchFieldException e) {
 e.printStackTrace();
      }
      sb.append("]");
      log.debug("Data Caching Redis Key : {}", sb.toString());
      return sb.toString();
    };
  }
  //自定义keyGenerator，Key生成器
  @Bean
  public KeyGenerator deleteByIdkeyGenerator() {
    return (target, method, params) -> {
      StringBuilder sb = new StringBuilder();
      sb.append(target.getClass().getName());
      sb.append(",Method:");
      sb.append("getById");
      sb.append(",Params[");
      for (int i = 0; i < params.length; i++) {
 sb.append(params[i].toString());
 if (i != (params.length - 1)) {
   sb.append(",");
 }
      }
      sb.append("]");
      log.debug("Data Caching Redis Key : {}", sb.toString());
      return sb.toString();
    };
  }
  

  @Bean
  public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
    RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
    //设置缓存过期时间
    if (expireTime > 0) {
      log.info("Redis 缓存过期时间 : {}", expireTime);
      //设置缓存有效期 秒
      redisCacheConfiguration.entryTtl(Duration.ofSeconds(expireTime));
    } else {
      log.info("Redis 未设置缓存过期时间");
    }
    return RedisCacheManager
 .builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
 .cacheDefaults(redisCacheConfiguration).build();
  }

  @Bean
  public RedisTemplate redisTemplate(RedisConnectionFactory factory) {//创建RedisTemplate
    // 设置序列化
    Jackson2JsonRedisSerializer