1、添加依赖

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

2、添加redis配置

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spring:
  redis:
    #数据库索引
    database: 2 
    host: 127.0.0.1
    port: 6379
    password: abcd123
    jedis:
      pool:
        max-active: 8
        max-wait: -1ms
        max-idle: 8
        min-idle: 0
    timeout: 300s

3、注入CacheManager

既然是用redis，当然要注入RedisCacheManager ，redis缓存管理器。

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@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    @Bean
    public RedisCacheManager cacheManager(RedisConnectionFactory factory) {
        return RedisCacheManager.create(factory);
    }

    @Bean
    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, String> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(factory);
        return redisTemplate;
    }
}

4、具体使用

简单来说，主要有三个注解

  1. @Cacheable 表示将返回结果缓存到redis，key值为dict::
    “#p0”表示取第一个参数，如果参数为对象，则可以通过#p0.id获取对象的id

  2. @CacheEvict表示删除该缓存数据

  3. @CachePut表示修改该缓存数据

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@ApiOperation(value = "获取字典详情", notes = "根据id获取字典")
@ApiImplicitParam(name = "id", value = "字典ID", required = true, dataType = "String", paramType = "query")
@RequestMapping(value = "get-by-id", method = RequestMethod.GET)
@Cacheable(value = "dict", key = "#p0")
public ResultModel<PtDict> getById(@RequestParam("id") String id) {
    System.out.println("开始获取id为【" + id + "】的字典");
    return new ResultModel<>(ResultStatus.SUCCESS, dictService.selectById(id));
}

5、缓存结果

请求两次上面的controller，返回结果如下：

  1. 结果被缓存到redis
  2. 第二次请求时候没有输出“开始获取id为【58ce515474cd454fb6266f49a01833c0】的字典”，因为此时数据已从redis获取
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转自：https://www.jianshu.com/p/8b026187dc62