@Cacheable缓存，自定义分组缓存时间、自定义缓存key(读取类+方法+参数）

java 复制代码

package com.ruoyi.project.tool.cache;

import com.ruoyi.project.system.domain.SysUser;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/redisTest")
@Slf4j
public class CacheTestController {

//    http://localhost:9876/redisTest/cache?userId=6&userName=zhangsan
    @GetMapping("/cache")
    @Cacheable(cacheNames = "User", keyGenerator = "cacheKeyGenerator")
    public Object cache(SysUser sysUser){
        log.info("sysUser: {}", sysUser);
        return sysUser;
    }
}

复制代码

CacheConfig

java 复制代码

package com.ruoyi.framework.config.cache;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
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.connection.RedisConnectionFactory;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.time.Duration;
import java.util.HashMap;
import java.util.Map;

@Configuration
@EnableCaching
public class CacheConfig {

    /**
     * CacheManager为一个接口，RedisCacheManager为该接口的实现
     * redisConnectionFactory 连接工厂
     * cacheDefaults 默认配置
     *
     * @param redisConnectionFactory
     * @return
     */
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        RedisCacheManager redisCacheManager = RedisCacheManager.builder(redisConnectionFactory)
                .cacheDefaults(defaultCacheConfig(10000))
                .withInitialCacheConfigurations(initCacheConfigMap())
                .transactionAware()
                .build();
        return redisCacheManager;

    }

    /**
     * 默认配置中进行了序列化的配置
     *
     * @param second
     * @return
     */
    private RedisCacheConfiguration defaultCacheConfig(Integer second) {
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

        //解决查询缓存转换异常的问题
        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 解决乱码的问题
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(second))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();

        return config;

    }

    /**
     * 针对不同的redis的key 有不同的过期时间
     *
     * @return
     */
    private Map<String, RedisCacheConfiguration> initCacheConfigMap() {

        Map<String, RedisCacheConfiguration> configMap = new HashMap<>();
        configMap.put("User", this.defaultCacheConfig(10 * 60));
        configMap.put("User1", this.defaultCacheConfig(1000));
        return configMap;
    }

}

复制代码

CacheKeyGenerator

java 复制代码

package com.ruoyi.framework.config.cache;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import java.lang.reflect.Method;


@Slf4j
@Component
public class CacheKeyGenerator implements KeyGenerator {

    @Override
    public Object generate(Object target, Method method, Object... params) {
//        log.info("===CacheKeyGenerator generate 19 --->target: {}, method: {}, params: {}", target, method, params);
        StringBuilder sb = new StringBuilder();
        sb.append(target.getClass().getName())
                .append(".")
                .append(method.getName())
                .append(":")
                .append(StringUtils.arrayToDelimitedString(params, "_"));// !注意，记得重写参数的toString哦
        log.info("===CacheKeyGenerator generate 27 --->sb: {}", sb);
        return sb.toString();
    }
}