SpringBootのRedis連携のアイデア解説

@Bean
@ConditionalOnMissingBean( //If the component condition is not injected, we can define a redisTemplate ourselves to replace this default
    name = {"redisTemplate"}
)
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
    //The default RedisTemplate does not have too many settings redis are required to serialize !
    //both generics are of type Object Object, we need to force conversions for future use<String,String>
    RedisTemplate<Object, Object> template = new RedisTemplate();
    template.setConnectionFactory(redisConnectionFactory);
    return template;
}

@Bean
@ConditionalOnMissingBean // Since String is the most commonly used type in redis, it's a good idea to propose a separate bean!
public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
    StringRedisTemplate template = new StringRedisTemplate();
    template.setConnectionFactory(redisConnectionFactory);
    return template;
}

# All SpringBoot configuration classes have an autoconfiguration class RedisAutoConfiguration
# AutoConfiguration classes are bound to a properties configuration file RedisProperties
# Configure redis
spring.redis.host=127.0.0.1
spring.redis.port=6379

spring.redis

package com.kk;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context;
import org.springframework.data.redis.connection;
import org.springframework.data.redis.core;

@SpringBootTest
class Redis01SpringbootApplicationTests {

    @Autowired
    private RedisTemplate redisTemplate;

    @Test
    void contextLoads() {
        /*
        redisTemplate
        opsForValue manipulates a string similar to String
        opsForList manipulates a List similar to List
        opsForSet
        opsForHash
        opsForZSet
        opsForGeo
        opsForHyperLogLog

        In addition to basic operations, our common methods can be used directly through redisTemplate such as transactions and basic CRUD


         */


        // Get the connection object of redis
// RedisConnection connection = redisTemplate.getConnectionFactory().getConnection();
// connection.flushDb();
// connection.flushAll();

        redisTemplate.opsForValue().set("kk1","kk2");
        System.out.println(redisTemplate.opsForValue().get("kk1"));

    }

}

package com.kk.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.stereotype;

import java.io;

@Component
@Data
@AllArgsConstructor
@NoArgsConstructor
// In the enterprise, all of our pojo will be serialized
public class User implements Serializable {
    private String name;
    private int age;
}

@Test
public void test() throws JsonProcessingException {
    // Real development generally uses json to pass objects
    User user = new User("kk", 17);
    String jsonUser = new ObjectMapper().writeValueAsString(user);//this becomes a json object
    redisTemplate.opsForValue().set("user",jsonUser);
    System.out.println(redisTemplate.opsForValue().get("user"));
}

r = new ObjectMapper().writeValueAsString(user);//this turns it into a json object
redisTemplate.opsForValue().set("user",jsonUser);
System.out.println(redisTemplate.opsForValue().get("user"));
}