springdata整合redis

导入pom依赖

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

       
       
           org.apache.commons
           commons-pool2
       

配置redis，记得开启redis服务器

spring:

  redis:
    host: 192.168.xxx.xx
    port: 6379
    #password: 123456
    database: 0
    timeout: 10000ms
    lettuce:
      pool:
        max-active: 1024
        max-wait: 10000ms
        max-idle: 200
        min-idle: 5

设置redis存入数据时序列化存储，序列化成一系列的字符串。

@Configuration//表示这是一个配置类，springboot会自动读取配置类
public class RedisConfig {
   @Bean
   public RedisTemplate redisTemplate(LettuceConnectionFactory lettuceConnectionFactory){
       RedisTemplate redisTemplate=new RedisTemplate<>();

       //为String类型的key设置序列化
       redisTemplate.setKeySerializer(new StringRedisSerializer());
       //为String类型的value设置序列化
       redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
       //为hash类型的key设置序列化
       redisTemplate.setHashKeySerializer(new StringRedisSerializer());
       //为hash类型的value设置序列化
       redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
       //设置redis连接工厂
       redisTemplate.setConnectionFactory(lettuceConnectionFactory);

       return redisTemplate;

   }
}

@Override
   public List getMenusByAdminId() {
       int adminId = ((Admin) SecurityContextHolder.getContext().getAuthentication().getPrincipal()).getId();
       //查询redis中是否有菜单
       ValueOperations valueOperations = redisTemplate.opsForValue();
       List menuList= (List) valueOperations.get("menu_" + adminId);

       //判断是否为空，为空则无
       if(CollectionUtils.isEmpty(menuList)){
           menuList=menuMapper.getMenusByAdminId(adminId);
           //将数据库查询的菜单信息，放到redis中
           valueOperations.set("menu_"+adminId,menuList);
       }

       return menuList;
   }