Redis client - SpringDataRedis

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Redis Client - SpringDataRedis | CoderMast Programming Mast https://www.codermast.com/database/redis/spring-data-redis.html

introduce

SpringData is a module for operating data in Spring, including the integration of various databases. The integration module for Redis is called SpringDataRedis. The official website address: https://spring.io/prohects/spring-data-redisopen in new window

• Provides integration with different Redis clients (Lettuce and Jedis)
• Provides RedisTemplate unified API to operate Redis
• Support Redis publish-subscribe model
• Support for Redis Sentinel and Redis Cluster
• Support Lettuce-based reactive programming
• Supports data serialization and deserialization based on JDK, JSON, strings, and Spring objects
• Supports Redis-based JDKCollection implementation

#Operation API

The RedisTemplate tool class is provided in SpringDataRedis, which encapsulates various operations on Redis. And the operation API of different data types is encapsulated into different types:

API	return type	illustrate
redisTemplate.opsForValue()	ValueOperations	Operation Stringtype data
redisTemplate.opsForHash()	HashOperations	Operation Hashtype data
redisTemplate.opsForList()	ListOperations	Operation Listtype data
redisTemplate.opsForSet()	SetOperations	Operation Settype data
redisTemplate.opsForZSet()	ZSetOperations	Operation SortedSettype data
redisTemplate		common command

Instructions for use

When we operate the corresponding Redis data, we obtain the corresponding operation object according to the data type. For example, when operating the String type, we call the method to  redisTemplate.opsForValue() obtain an  ValueOperations object to operate  String the type of data.

# Used in Spring Boot

1. Introduce dependencies

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

<!--连接池依赖-->
<dependency>
    <groupId>org.apache.commons<groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

1. configuration file

spring :
  redis :
      host : 192.168.100.100
      port : 6379
      password : codermast
      lettuce : 
        pool : 
          max-active : 8 # 最大的连接数
          max-idle : 8   # 最大空闲连接
          min-idle : 0   # 最小空闲连接
          max-wait : 100 # 连接等待时间

1. Get the RedisTemplate object

@Autowired
private RedisTemplate redisTemplate;

In the Spring Boot framework, use automatic injection to obtain objects

1. write test class

@SpringBootTest
public class RedisTest {

    @Autowired
    private RedisTemplate redisTemplate;

    @Test
    void testString(){
        // 插入一条 String 类型的数据
        redisTemplate.opsForValue().set("name","codermast");

        // 获取一条 String 类型的数据
        Object name = redisTemplate.opsForValue().get("name");

        System.out.println("我的名字是：" + name);
    }
}

1. Run to view the results

我的名字是：codermast