SpringBoot 整合 Redis 缓存
< 返回列表时间: 2020-06-03来源:OSCHINA
1.首先导入使用Maven导入jar包
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.62</version> </dependency>

2.在application.properties配置信息
# Redis数据库索引(默认为0) spring.redis.database=0 # Redis服务器地址 spring.redis.host=localhost # Redis服务器连接端口 spring.redis.port=6379 # Redis服务器连接密码(默认为空) spring.redis.password=123456 # 连接池最大连接数(使用负值表示没有限制) spring.redis.pool.max-active=200 # 连接池最大阻塞等待时间(使用负值表示没有限制) spring.redis.pool.max-wait=-1 # 连接池中的最大空闲连接 spring.redis.pool.max-idle=10 # 连接池中的最小空闲连接 spring.redis.pool.min-idle=0 # 连接超时时间(毫秒) spring.redis.timeout=1000ms

3.编写Redis工具类
@Configuration @ConditionalOnClass(RedisOperations.class) //系统中有RedisOperations类时 @EnableConfigurationProperties(RedisProperties.class) //启动RedisProperties这个类 @EnableCaching // www.1b23.com public class RedisConfig extends CachingConfigurerSupport { @Autowired RedisTemplate redisTemplate; // 配置缓存管理器 @Bean public RedisCacheManager cacheManager(RedisConnectionFactory connectionFactory) { LettuceConnectionFactory jedisConnectionFactory = (LettuceConnectionFactory) redisTemplate.getConnectionFactory(); jedisConnectionFactory.setDatabase(2); //指定dbindex redisTemplate.setConnectionFactory(jedisConnectionFactory); jedisConnectionFactory.resetConnection(); RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig() .entryTtl(Duration.ofSeconds(60*20)) // 20分钟缓存失效 // 设置key的序列化方式 // .entryTtl(Duration.ofSeconds(10)) .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer())) // 设置value的序列化方式 .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new FastJsonRedisSerializer(Object.class))) // 不缓存null值 .disableCachingNullValues(); RedisCacheManager redisCacheManager = RedisCacheManager.builder(connectionFactory) .cacheDefaults(config) .transactionAware() .build(); return redisCacheManager; } }
package com.FireService.config; import java.nio.charset.Charset; import org.springframework.data.redis.serializer.RedisSerializer; import org.springframework.data.redis.serializer.SerializationException; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.parser.ParserConfig; import com.alibaba.fastjson.serializer.SerializerFeature; public class FastJsonRedisSerializer<T> implements RedisSerializer<T> { public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8"); private Class<T> clazz; static { ParserConfig.getGlobalInstance().addAccept("com.FireService"); } public FastJsonRedisSerializer(Class<T> clazz) { super(); this.clazz = clazz; } @Override public byte[] serialize(T t) throws SerializationException { if (null == t) { return new byte[0]; } return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET); } @Override public T deserialize(byte[] bytes) throws SerializationException { if (null == bytes || bytes.length <= 0) { return null; } String str = new String(bytes, DEFAULT_CHARSET); return (T) JSON.parseObject(str, clazz); } }

4.SpringBoot有关缓存的几个注解
@Cacheable:查询
可选属性:
cacheNames/value:指定缓存组件的名字;
key:缓存数据使用的key,可以用来指定。默认即使用方法参数的值
keyGenerator:key的生成器,可以自己指定key的生成器的组件id
//自定义配置类配置keyGenerator @Configuration public class MyCacheConfig { @Bean("myKeyGenerator") public KeyGenerator keyGenerator(){ return new KeyGenerator() { @Override public Object generate(Object target, Method method, Object... params) { return method.getName()+"["+ Arrays.asList(params).toString() +"]"; } }; } }

cacheManager:指定缓存管理器;或者cacheResolver获取指定解析器
condition:指定符合条件的情况下才缓存;如condition="#id>0"
unless:否定缓存,当unless指定的条件为true,方法的返回值不会被缓存,可以获取到结果进行判断;如unless="#result==null";
sync:是否使用异步模式
例如:
@Cacheable(value = "RedisInfo", key = "#root.methodName+'['+#account+']'") @ResponseBody @RequestMapping("/RedisTest") public Result findUserOrder(String account) throws Exception{ if(account!=null) { List<Map<String, Object>> list=orderFindGoods.findUserOrder(account); return Results.successWithData(list, BaseEnums.SUCCESS.code(), BaseEnums.SUCCESS.desc()); }else { return Results.failure(); } }

运行项目查看结果
1.第一次访问


查看Druid连接信息

热门排行