spring boot之缓存Redis

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一、添加jar

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

二、修改配置

spring.cache.type=redis

三、使用

package com.drunck.service.impl;

import javax.annotation.Resource;

import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Repository;

import com.drunck.domain.SysAdmin;
import com.drunck.mapper.SysAdminMapper;
import com.drunck.service.CacheService;

@CacheConfig(cacheNames = "ehCache")
@Repository
public class CacheServiceImpl implements CacheService {
    @Resource
    private SysAdminMapper sysAdminMapper;

    @CachePut(key = "'key_'+#sysAdmin.getId()")
    @Override
    public SysAdmin save(SysAdmin sysAdmin) {
        SysAdmin admin = new SysAdmin();
        admin.setId(sysAdmin.getId());
        admin.setUserName(sysAdmin.getUserName());
        return admin;
    }

    @CachePut(key = "'key_'+#sysAdmin.getId()")
    @Override
    public SysAdmin update(SysAdmin sysAdmin) {
        SysAdmin admin = new SysAdmin();
        admin.setId(sysAdmin.getId());
        admin.setUserName(sysAdmin.getUserName());
        return admin;
    }

    @Cacheable(key = "'key_'+#id")
    @Override
    public SysAdmin queryById(String id) {
        System.out.println("查询功能，缓存找不到，直接读库, id=" + id);
        return sysAdminMapper.selectByPrimaryKey(id);
    }

    @CacheEvict(key = "'key_'+#id")
    @Override
    public void deleteById(String id) {
    }

}

四、缓存管理器

package com.drunck.configuration;

import java.util.HashMap;
import java.util.Map;

import org.springframework.cache.CacheManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.core.RedisTemplate;

/**
 * redis 自定义缓存管理器
 * 
 * @author wujing
 */
@Configuration
public class RedisCacheConfiguration {
    /**
     * 自定义缓存管理器.
     * 
     * @param redisTemplate
     * @return
     */
    @Bean
    public CacheManager cacheManager(RedisTemplate<?, ?> redisTemplate) {
        RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
        // 设置默认的过期时间
        cacheManager.setDefaultExpiration(20);
        Map<String, Long> expires = new HashMap<String, Long>();
        // 单独设置
        expires.put("ehCache", 200L);
        cacheManager.setExpires(expires);
        return cacheManager;
    }
}