SpringBoot整合Redis的实现示例

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

<!-- redis -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- spring2.X 集成 redis 所需 common-pool-->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
    <!--不要带版本号,防止冲突-->
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.13.2.2</version>
</dependency>

spring:
  redis:
    host: 192.168.79.202
    port: 6379
    #Redis 数据库索引（默认为 0）
    database: 0
    #连接超时时间（毫秒）
    timeout: 1800000
    lettuce:
      pool:
        #连接池最大连接数（使用负值表示没有限制）
        max-active: 20
        #最大阻塞等待时间(负数表示没限制)
        max-wait: -1
        #连接池中的最大空闲连接
        min-idle: 0
        #密码
    password: foobared

@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template =
                new RedisTemplate<>();
        //这里可以验证..
        //System.out.println("template=>" + template);
        RedisSerializer<String> stringRedisSerializer =
                new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer =
                new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.activateDefaultTyping(
                LaissezFaireSubTypeValidator.instance,
                ObjectMapper.DefaultTyping.NON_FINAL,
                JsonTypeInfo.As.WRAPPER_ARRAY);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setConnectionFactory(factory);
        //key序列化方式
        template.setKeySerializer(stringRedisSerializer);
        //value序列化
        template.setValueSerializer(jackson2JsonRedisSerializer);
        //value hashmap序列化
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        return template;
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisSerializer<String> stringRedisSerializer =
                new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        //解决查询缓存转换异常的问题
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.activateDefaultTyping(
                LaissezFaireSubTypeValidator.instance,
                ObjectMapper.DefaultTyping.NON_FINAL,
                JsonTypeInfo.As.WRAPPER_ARRAY);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        // 配置序列化（解决乱码的问题）,过期时间600秒
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(600))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(stringRedisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }
}

@RestController
@RequestMapping("/redisTest")
public class RedisTestController {

    @Resource
    private RedisTemplate redisTemplate;

    //编写一个测试方法，演示设置数据和获取数据
    @GetMapping("/t1")
    public String t1(){
        //设置值到redis
        redisTemplate.opsForValue().set("book","西游记");
        //从redis获取值
        String book = (String)redisTemplate.opsForValue().get("book");
        return book;
    }

}

//编写方法，演示如何操作list,hash,set,zset
//opsForList、opsForHash、opsForSet、opsForZSet
@GetMapping("/t2")
public String t2(){
    redisTemplate.opsForList().leftPushAll("books","西游记","java");
    List books = redisTemplate.opsForList().range("books", 0, -1);
    StringBuilder builder = new StringBuilder();
    for (Object book : books) {
        builder.append(book.toString()).append(" ");
        System.out.println("书名："+book.toString());
    }
    return builder.toString();
}

//编写一个方法获取所有的key
@GetMapping("/t3")
public String t3(){
    Set keys = redisTemplate.keys("*");
    System.out.println(keys.size());
    System.out.println(keys);
    return "ok";
}
//输出结果
0
[]

//编写方法获取客户端设置的key
//问题描述：在客户端设置了key，通过redisTemplate获取会报错
@GetMapping("/t4")
public String t4(){
    String name = (String)redisTemplate.opsForValue().get("name");
    System.out.println("name = "+name);
    return name;
}