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简介

• Spring Cache是一个框架，实现了基于注解的缓存功能
• 底层可以使用EHCache、Caffeine、Redis实现缓存。

注解一般放在Controller的方法上，@CachePut 注解一般有两个参数，第一个时存储的名称，第二个时名称后边的key，使用SpEL动态的计算key。其余的注解也都是这两个参数。在用户端的查询操作需要使用@Cacheable，服务器端的增删改都使用@CacheEvict

引入依赖

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

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

mysql
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

mybatis
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.0</version>
</dependency>

常用注解

application.yml

server:
  port: 8888
spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/test?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
      username: root
      password: root
  redis:
    host: localhost
    port: 6379
    password: 123456
    database: 1
# 日志
logging:
  level:
    com:
      itheima:
        mapper: debug
        service: info
        controller: info

使用

1. 启动类添加注解

package com.itheima;

import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;

@Slf4j
@SpringBootApplication
-----------------------------------------
添加下面的注解
@EnableCaching
-----------------------------------------
public class CacheDemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(CacheDemoApplication.class,args);
        log.info("项目启动成功...");
    }
}

使用方法上添加注解