SpringBoot简单集成Redis，实现简单查询

刺骨的言语ヽ痛彻心扉 2022-11-10 14:26 146阅读 0赞

## 1引入redis的依赖 ##

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

## 2yml中配置redis地址、端口、密码 ##

redis:
        # redis密码
        password:
        alone:
          #redis地址
          host: 127.0.0.1
          #redis端口
          port: 6379

## 3在server中使用redis ##

#### 首先实体类要实现序列化 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTE1MTk2MA_size_16_color_FFFFFF_t_70]

@Service
    public class SysUserService { 
    	//自动注入redis
    	@Autowired
        private RedisTemplate<Object,Object> redisTemplate;
    
    	//根据用户id获取用户信息
    	 public SysUser selectSysUserByUserId(Integer userId){ 
            //修改key的序列化类型 提高可读行 StringRedisSerializer设置key的类型为string
            RedisSerializer redisSerializer = new StringRedisSerializer();
            redisTemplate.setKeySerializer(redisSerializer);
    
            //从redis缓存中查询
            SysUser sysUser = (SysUser) redisTemplate.opsForValue().get("sysUser");
            //如果为空则从数据库查询
            if(sysUser == null){ 
                //从数据库查询
                 sysUser = sysUserDao.selectSysUserByUserId(userId);
                 //存入redis中
                 redisTemplate.opsForValue().set("sysUser",sysUser);
            }
            return sysUser;
        }
    }

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