spring和redis的整合 spring 整合redis

  spring集成redis主要依靠spring-integration-redis来进行集成。因为主流的Java redis客户端有三种，jedis、Lettuce和Jedisson。而spring-integration-redis只支持jedis和Lettuce。下面简单介绍两种客户端的配置方式。

一 集成jedis

  首先通过maven配置依赖：

<dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework.integration/spring-integration-redis -->
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-redis</artifactId>
            <version>5.5.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.14</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.8.0</version>
        </dependency>

    </dependencies>
``
  因为都是第三方jar，如果不使用xml的话，就只能使用@Bean注解来配置了，java代码如下：
```java
@Configuration
public class SpringJedisDemo {
    @Bean
    public RedisStandaloneConfiguration redisStandaloneConfiguration() {
        final RedisStandaloneConfiguration configuration = new RedisStandaloneConfiguration();
        configuration.setHostName("localhost");
        configuration.setPort(6379);
        return configuration;
    }

    @Bean
    public RedisConnectionFactory redisConnectionFactory(RedisStandaloneConfiguration configuration) {
        final JedisConnectionFactory factory = new JedisConnectionFactory(configuration);
        factory.afterPropertiesSet();
        return factory;
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        final RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(factory);
        return template;
    }

    public static void main(String[] args) {
        final AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(SpringJedisDemo.class);
        final RedisTemplate<String, Object> redisTemplate = ctx.getBean(RedisTemplate.class);
        final ValueOperations<String, Object> opsForValue = redisTemplate.opsForValue();
        opsForValue.set("China", "Peking");
        System.out.println(opsForValue.get("China"));
    }

}

二 集成lettuce

  集成lettuce与jedis大同小异。因为spring优雅的设计，两者实现了同一个接口，所以只需要改动一点点就行了。首先是依赖:

<dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework.integration/spring-integration-redis -->
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-redis</artifactId>
            <version>5.5.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.14</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/io.lettuce/lettuce-core -->
        <dependency>
            <groupId>io.lettuce</groupId>
            <artifactId>lettuce-core</artifactId>
            <version>6.0.9.RELEASE</version>
        </dependency>

    </dependencies>

  Java代码：

@Configuration
public class SpringLettuceDemo {
    @Bean
    public RedisStandaloneConfiguration redisStandaloneConfiguration() {
        final RedisStandaloneConfiguration configuration = new RedisStandaloneConfiguration();
        configuration.setHostName("localhost");
        configuration.setPort(6379);
        return configuration;
    }

    @Bean
    public RedisConnectionFactory redisConnectionFactory(RedisStandaloneConfiguration configuration) {
        final LettuceConnectionFactory factory = new LettuceConnectionFactory(configuration);
        factory.afterPropertiesSet();
        return factory;
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        final RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(factory);
        return template;
    }

    public static void main(String[] args) {
        final AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(SpringLettuceDemo.class);
        final RedisTemplate<String, Object> redisTemplate = ctx.getBean(RedisTemplate.class);
        final ValueOperations<String, Object> opsForValue = redisTemplate.opsForValue();
        opsForValue.set("China", "Peking");
        System.out.println(opsForValue.get("China"));
    }

}