package com.fcc.config;

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.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

import java.lang.reflect.Method;

/**
 * @Author:FeiCongcong
 * @Date:2017/7/3 0003 14:48
 */
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {

    /*定義快取資料 key 生成策略的bean
    包名+類名+方法名+所有引數
    */
    @Bean
    public KeyGenerator wiselyKeyGenerator(){
        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();
            }
        };

    }

    /*要啟用spring快取支援,需建立一個 CacheManager的 bean，CacheManager 介面有很多實現，這裡Redis 的整合，用 RedisCacheManager這個實現類
    Redis 不是應用的共享記憶體，它只是一個記憶體伺服器，就像 MySql 似的，
    我們需要將應用連線到它並使用某種“語言”進行互動，因此我們還需要一個連線工廠以及一個 Spring 和 Redis 對話要用的 RedisTemplate，
    這些都是 Redis 快取所必需的配置，把它們都放在自定義的 CachingConfigurerSupport 中
     */
    @Bean
    public CacheManager cacheManager(
            @SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {
        RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
//        cacheManager.setDefaultExpiration(60);//設定快取保留時間（seconds）
        return cacheManager;
    }

    //1.專案啟動時此方法先被註冊成bean被spring管理
    @Bean
    public RedisTemplate<String, String> redisTemplate(
            RedisConnectionFactory factory) {StringRedisTemplate template = new StringRedisTemplate(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }
}
 

Service層用法：

  @Cacheable(value = "role",keyGenerator="wiselyKeyGenerator")

    public RolePojo getRoleByStrs(String str,String str1,String str2){

        return roleDao.getRoleByStr(str);

}