java、spring连接redis

java集成Redis

依赖

<dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.1.0</version> </dependency> // 创建一个 Jedis 的连接 Jedis jedis = new Jedis(“127.0.0.1”, 6379); // 密码认证 如果设置了密码，就需要进行认证 jedis.auth(“offcn123”); // 执行 redis 命令 jedis.set(“mytest”, “hello world, this is jedis client!”);

Spring整合Redis

依赖

<dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>2.2.0.RELEASE</version> </dependency> @ComponentScan(basePackages = "demos") @Configuration public class Application{ @Bean public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory){ RedisTemplate template=new RedisTemplate(); template.setConnectionFactory(redisConnectionFactory); template.setDefaultSerializer(new StringRedisSerializer()); return template; } @Bean public RedisConnectionFactory redisConnectionFactory(){ RedisStandaloneConfiguration configuration = new RedisStandaloneConfiguration(); JedisConnectionFactory factory=new JedisConnectionFactory(configuration); return factory; } public static void main(String args[]){ ApplicationContext context = new AnnotationConfigApplicationContext(Application.class); RedisTemplate redis = context.getBean(RedisTemplate.class); redis.opsForValue().set("11", "222"); System.out.println( bean.opsForValue().get("11"));; } }

Redis序列化

1、当我们使用RedisTemplte对数据进行操作的时候它会采用序列化的方式将我们的数据存入redis

2、RedisTemplte默认使用序列化方式是我们的JDK序列化

3、区别：

JdkSerializationRedisSerializer序列化后长度最小，Jackson2JsonRedisSerializer效率最高。

如果综合考虑效率和可读性，牺牲部分空间，推荐key使用StringRedisSerializer，保持的key简明易读；value可以使用Jackson2JsonRedisSerializer

如果空间比较敏感，效率要求不高，推荐key使用StringRedisSerializer，保持的key简明易读；value可以使用JdkSerializationRedisSerializer

总结：

1、Redis支持的序列化方式

JdkSerializationRedisSerializer：默认值Jackson2JsonRedisSerializerStringRedisSerializer ：推荐

SpringBoot整合Redis

依赖

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

配置application.yml

spring: redis: host: localhost port: 6379

注入spring容器

@SpringBootApplication @EnableScheduling public class ReptilesCoreApplication { public static void main(String[] args) { SpringApplication.run(ReptilesCoreApplication.class, args); } @Bean public RestTemplate restTemplate(){ return new RestTemplate(); } @Bean public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory factory){ StringRedisTemplate template = new StringRedisTemplate(); template.setConnectionFactory(factory); return template; } }

使用

@Autowired public StringRedisTemplate redisTemplate; //将数据放入redis中 ValueOperations<String, String> forValue = redisTemplate.opsForValue(); forValue.set(key,value); //将id放入当做唯一标识，识别是否存储 SetOperations<String, String> forSet = redisTemplate.opsForSet(); forSet.add(RedisKeyEnum.IDS.getKey(),article.getId());

使用redisTemplate对象对Redis进行操作。