SpringBoot2.XX 产生的问题

SpringBoot2.X 使用中发现的问题（持续更新中...）

redis：

这种已经不在使用了

@Bean
public CacheManager cacheManager(RedisTemplate redisTemplate) {
    RedisCacheManager rcm = new RedisCacheManager(redisTemplate);
    return rcm;
}

建议切换成这种

/**
 * 管理缓存
 */
@Bean
public CacheManager cacheManager(RedisConnectionFactory connectionFactory) {
    //初始化一个RedisCacheWriter
    RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(connectionFactory);
    //设置CacheManager的值序列化方式为JdkSerializationRedisSerializer,但其实RedisCacheConfiguration默认就是使用StringRedisSerializer序列化key，JdkSerializationRedisSerializer序列化value,因此如下注释代码为默认实现
    //ClassLoader loader = this.getClass().getClassLoader();
    //JdkSerializationRedisSerializer jdkSerializer = new JdkSerializationRedisSerializer(loader);
    //RedisSerializationContext.SerializationPair<Object> pair = RedisSerializationContext.SerializationPair.fromSerializer(jdkSerializer);
    //RedisCacheConfiguration defaultCacheConfig=RedisCacheConfiguration.defaultCacheConfig().serializeValuesWith(pair);
    RedisCacheConfiguration defaultCacheConfig = RedisCacheConfiguration.defaultCacheConfig();
    //设置默认超过时时间是30秒
    //defaultCacheConfig.entryTtl(Duration.ofSeconds(30));
    //初始化RedisCacheManager
    RedisCacheManager cacheManager = new RedisCacheManager(redisCacheWriter, defaultCacheConfig);
    return cacheManager;
}

mysql：

    驱动也已经修改了 换成 com.mysql.cj.jdbc.Driver

spring:
    datasource:
        driver-class-name: com.mysql.cj.jdbc.Driver