对于项目中一些访问量较大的接口，配置上Redis缓存，提升系统运行速度。

1 windows平台安装Redis

github.com/MicrosoftArchive/redis

解压

redis-server.exe启动程序
redis.windows.conf核心配置文件
启动指令：redis-server redis.windows.conf

生产环境必须使用linux版本的Redis…

2 引入依赖

修改pom文件

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

3 修改配置文件

修改application.properties文件

spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=

4 启动类添加注解

@EnableCaching

5 指定缓存哪个方法

@Cacheable(value = "listCategoryForCustomer")

6 配置Redis的超时时间

package com.imooc.mall.config;

import java.time.Duration;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;

/**
 * 描述：     缓存的配置类
 */
@Configuration
@EnableCaching
public class CachingConfig {

    @Bean
    public RedisCacheManager redisCacheManager(RedisConnectionFactory connectionFactory) {

        RedisCacheWriter redisCacheWriter = RedisCacheWriter
                .lockingRedisCacheWriter(connectionFactory);
        RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
        cacheConfiguration = cacheConfiguration.entryTtl(Duration.ofSeconds(30));

        RedisCacheManager redisCacheManager = new RedisCacheManager(redisCacheWriter,
                cacheConfiguration);
        return redisCacheManager;
    }
}

小BUG

类保存到缓存中，必须实现Serializable接口。。。

测试

第一次访问

1228 ms

第二次访问

15 ms