SpringBoot使用NoSQL——Redis的使用

2024-11-07 技术教程

Spring Boot提供Redis，MongoDB，Neo4j，Elasticsearch，Solr Cassandra，Couchbase和LDAP的自动配置; 如果你要想使用其他nosql技术，需要自己参考“https://projects.spring.io/spring-data/”的文档。

使用redis

Redis是一个缓存，消息代理和功能丰富的键值对存储。Spring Boot为Jedis客户端库和Spring Data Redis提供自动配置和抽象类。项目需依赖“spring-boot-starter-data-redis”的Starter。使用的时候在bean中注入RedisConnectionFactory，StringRedisTemplate或者RedisTemplate的实例即可，字符串操作推荐使用StringRedisTemplate其他类型推荐使用RedisTemplate。没有配置redis链接地址的情况下默认为localhost:6379。

pom依赖

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

redis配置

import java.lang.reflect.Method;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 org.springframework.data.redis.serializer.StringRedisSerializer;import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;import com.fasterxml.jackson.annotation.PropertyAccessor;import com.fasterxml.jackson.databind.ObjectMapper;@Configuration@EnableCachingpublic class RedisConfig extends CachingConfigurerSupport { @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(); } }; } @Bean public CacheManager cacheManager(@SuppressWarnings("rawtypes") RedisTemplate redisTemplate) { RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate); // 失效时间(秒)，默认不失效 cacheManager.setDefaultExpiration(60); return cacheManager; } @Bean public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory factory) { RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<Object, Object>(); redisTemplate.setConnectionFactory(factory); redisTemplate.setKeySerializer(new StringRedisSerializer()); redisTemplate.setValueSerializer(buildJackson2JsonRedisSerializer()); redisTemplate.afterPropertiesSet(); return redisTemplate; } @Bean public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory factory) { StringRedisTemplate stringRedisTemplate = new StringRedisTemplate(factory); stringRedisTemplate.setDefaultSerializer(new StringRedisSerializer()); stringRedisTemplate.afterPropertiesSet(); return stringRedisTemplate; } private Jackson2JsonRedisSerializer<Object> buildJackson2JsonRedisSerializer() { Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, Visibility.ANY); om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); jackson2JsonRedisSerializer.setObjectMapper(om); return jackson2JsonRedisSerializer; }}

注入

@RunWith(SpringJUnit4Cla***unner.class)@SpringBootTest(classes = Application.class)public class RedisTemplateTest { @Resource private RedisTemplate<String, Object> redisTemplate; @Resource private StringRedisTemplate stringRedisTemplate; ......}