Springboot整合Redis学习

Springboot整合Redis学习

在 SpringBoot2.x 之后，原来使用的jedis 被替换为了 lettuce?

jedis : 采用的直连，多个线程操作的话，是不安全的，如果想要避免不安全的，使用 jedis pool 连接池！ 更像 BIO 模式

lettuce : 采用netty，实例可以再多个线程中进行共享，不存在线程不安全的情况！可以减少线程数据了，更像 NIO 模式

源码分析：

@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
public class RedisAutoConfiguration {@Bean@ConditionalOnMissingBean(name = "redisTemplate")public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)throws UnknownHostException {RedisTemplate<Object, Object> template = new RedisTemplate<>();template.setConnectionFactory(redisConnectionFactory);return template;}@Bean@ConditionalOnMissingBeanpublic StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)throws UnknownHostException {StringRedisTemplate template = new StringRedisTemplate();template.setConnectionFactory(redisConnectionFactory);return template;}}

1.Maven依赖

<parent><groupId>org.springframework.bootgroupId><artifactId>spring-boot-starter-parentartifactId><version>2.1.6.RELEASEversion><relativePath/> parent><properties><project.build.sourceEncoding>UTF-8project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding><java.version>1.8java.version>properties><dependencies><dependency><groupId>org.springframework.bootgroupId><artifactId>spring-boot-starter-data-redisartifactId>dependency><dependency><groupId>org.springframework.bootgroupId><artifactId>spring-boot-starter-webartifactId>dependency><dependency><groupId>org.springframework.bootgroupId><artifactId>spring-boot-starter-testartifactId><scope>testscope>dependency>dependencies>

2.application.yml

spring:redis:port: 6379host: 127.0.0.1database: 1

3.测试类

@RunWith(SpringRunner.class)
@SpringBootTest(classes = UserApplication.class)
public class RedisTest {@AutowiredRedisTemplate redisTemplate;@Testpublic void redisTest(){redisTemplate.opsForValue().set("name","张三");System.out.println(redisTemplate.opsForValue().get("name"));}@Testpublic void delRedis(){redisTemplate.delete("name");System.out.println(redisTemplate.opsForValue().get("name"));}
}

此时我们回到Redis查看数据时候，惊奇发现全是乱码，可是程序中可以正常输出。这时候就关系到存储对象的序列化问题，在网络中传输的对象也是一样需要序列化，否者就全是乱码。

解决方案

@Configuration
public class RedisConfig {@Bean@SuppressWarnings("all")public RedisTemplate<String,Object>redisTemplate(RedisConnectionFactory factory){// 我们为了自己开发方便，一般直接使用 RedisTemplate<String, Object> template = new RedisTemplate<String,Object>();template.setConnectionFactory(factory);// Json序列化配置Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = newJackson2JsonRedisSerializer(Object.class);ObjectMapper om = new ObjectMapper();om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);jackson2JsonRedisSerializer.setObjectMapper(om);// String 的序列化StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();// key采用String的序列化方式template.setKeySerializer(stringRedisSerializer);// hash的key也采用String的序列化方式template.setHashKeySerializer(stringRedisSerializer);// value序列化方式采用jacksontemplate.setValueSerializer(jackson2JsonRedisSerializer);// hash的value序列化方式采用jacksontemplate.setHashValueSerializer(jackson2JsonRedisSerializer);template.afterPropertiesSet();return template;}
}

相关博客的链接

狂神redis笔记

redis工具类

本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！