@Cacheable(value="mycache")或者@Cacheable(value={<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->"cache1","cache2"})

@Cacheable(value="testcache",key="#student.id")

@Cacheable(value="testcache",condition="#student.id>2")

@CacheEvict(value="testcache",allEntries=true)

@Caching(
cacheable=@Cacheable("cache1"),
evict={@CacheEvict("cache2"),@CacheEvict(value="cache3",allEntries=true)}
)

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

        <!-- spring2.X集成redis所需common-pool2-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.6.0</version>
        </dependency>

/**
 * Redis+Cache配置類
 */
@Configuration
@EnableCaching
public class RedisConfig {
    /**
     * 自定義key規(guī)則
     * @return
     */
    @Bean
    public KeyGenerator keyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    }

    /**
     * 設(shè)置RedisTemplate規(guī)則
     * @param redisConnectionFactory
     * @return
     */
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

        //解決查詢緩存轉(zhuǎn)換異常的問題
        ObjectMapper om = new ObjectMapper();
        // 指定要序列化的域，field,get和set,以及修飾符范圍，ANY是都有包括private和public
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 指定序列化輸入的類型，類必須是非final修飾的，final修飾的類，比如String,Integer等會(huì)跑出異常
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        //序列號(hào)key value
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

    /**
     * 設(shè)置CacheManager緩存規(guī)則
     * @param factory
     * @return
     */
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

        //解決查詢緩存轉(zhuǎn)換異常的問題
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        // 配置序列化（解決亂碼的問題）,過期時(shí)間600秒
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(600))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();

        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }

}

# redis配置
spring.redis.host=192.168.159.33
spring.redis.port=6379
spring.redis.database= 0
spring.redis.timeout=1800000

spring.redis.lettuce.pool.max-active=20
spring.redis.lettuce.pool.max-wait=-1
#最大阻塞等待時(shí)間(負(fù)數(shù)表示沒限制)
spring.redis.lettuce.pool.max-idle=5
spring.redis.lettuce.pool.min-idle=0

@Service
public class DictServiceImpl extends ServiceImpl<DictMapper, Dict> implements DictService {

    //根據(jù)上級(jí)id查詢子數(shù)據(jù)列表
    @Override
    @Cacheable(value = "dict",keyGenerator = "keyGenerator")
    public List<Dict> findChildData(Long id) {
        QueryWrapper<Dict> wrapper=new QueryWrapper<>();
        wrapper.eq("parent_id",id);
        List<Dict> list = baseMapper.selectList(wrapper);
        //向list集合中的每個(gè)dict對(duì)象中設(shè)置hasChildren
        list.forEach(x->{
            Long dictId = x.getId();
            boolean isChild = this.isChildren(dictId);
            x.setHasChildren(isChild);
        });
        return list;
    }

    //導(dǎo)出數(shù)據(jù)字典接口
    @Override
    public void exportDictData(HttpServletResponse response) {
        //設(shè)置下載信息
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
// 這里URLEncoder.encode可以防止中文亂碼 當(dāng)然和easyexcel沒有關(guān)系
        String fileName = "dict";
        response.setHeader("Content-disposition", "attachment;filename="+ fileName + ".xlsx");

        //查詢數(shù)據(jù)庫
        List<Dict> dictList = baseMapper.selectList(null);
        //Dict-->DictEeVo
        List<DictEeVo> dictEeVoList=new ArrayList<>();
        dictList.forEach(x->{
            DictEeVo dictEeVo=new DictEeVo();
            BeanUtils.copyProperties(x,dictEeVo);
            dictEeVoList.add(dictEeVo);
        });

        try {
            //調(diào)用方法實(shí)現(xiàn)寫操作
            EasyExcel.write(response.getOutputStream(), DictEeVo.class)
                    .sheet("dict")
                    .doWrite(dictEeVoList);
        } catch (IOException e) {
            e.printStackTrace();
        }


    }

    //導(dǎo)入數(shù)據(jù)字典
    @Override
    @CacheEvict(value = "dict", allEntries=true)
    public void importDictData(MultipartFile file) {
        try {
            //excel數(shù)據(jù)取出來并添加到數(shù)據(jù)庫中
            EasyExcel.read(file.getInputStream(),DictEeVo.class,new DictListener(baseMapper))
            .sheet()
            .doRead();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //判斷id下面是否有子數(shù)據(jù)
    private boolean isChildren(Long id){
        QueryWrapper<Dict> wrapper=new QueryWrapper<>();
        wrapper.eq("parent_id",id);
        Integer count = baseMapper.selectCount(wrapper);
        return count > 0;
    }
}