SpringBoot 2.x 通过注解方式使用Redis

SpringBoot 2.x版本使用注解方式使用Redis与SpringBoot 1.x 有所改变，主要是类库有所不同。

Redis配置工具类如下

package com.test;

import java.time.Duration;

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.context.annotation.Primary;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 通过注解使用Redis内存服务器
 */
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport{

	/**
	* 生成Redis的键值，根据类名＋方法名＋参数值的形式
	* @return
	*/
    @Bean(name = "keyGenerator")
    public KeyGenerator keyGenerator() {
        return new KeyGenerator(){
            @Override
            public Object generate(Object target, java.lang.reflect.Method method, 
                    Object... params) {
                StringBuffer sb = new StringBuffer();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for(Object obj:params){
                    if(obj != null)
                    {
                    	sb.append("_");
                        sb.append(obj.toString());
                    }
                }
                return sb.toString();
            }
        };
    }

    
    @SuppressWarnings("rawtypes")
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
    	// 设置缓存有效期
    	RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofSeconds(10));
    	return RedisCacheManager
    	.builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
    	.cacheDefaults(redisCacheConfiguration).build();

    }

    @Bean
    @SuppressWarnings({"rawtypes", "unchecked"})
    public RedisTemplate<Object,Object> redisTemplate(RedisConnectionFactory connectionFactory){
        RedisTemplate<Object,Object> redisTemplate=new RedisTemplate<>();
        redisTemplate.setConnectionFactory(connectionFactory);
        //使用Jackson2JsonRedisSerializer替换默认的序列化规则
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer=new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper=new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL,JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);


        //设置value的序列化规则
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        //设置key的序列化规则
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }


	/**
	 * 序列化Redis的键和值对象
	* @param template
	*/
    private void setSerializer(RedisTemplate template){
        @SuppressWarnings({ "rawtypes", "unchecked" })
        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);
     }
}