String Boot + Redis - SET and GET String Commands Examples

Step 1: Setting up your Spring Boot + Redis Project Dependencies

Make sure you add the Redis dependency to your Spring Boot Project.




build.gradle:

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-data-redis'
}




pom.xml:

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

Step 2: Setting Redis Configurations in application.properties

Make sure to add the below properties if you have setup Redis Server on your local machine or a server.

# Redis configuration
spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=redis-db-password

Note: If you are just starting with Redis and trying to learn, its better to setup a free Redis Cloud account and make use of it.

Spring Boot + Redis Cloud Configuration and Setup Tutorial

Step 3: Redis SET and GET Command Examples with Spring Boot

Just like working with Spring Boot JDBCTemplate, we have a class called RedisTemplate which we can make use of to perform SET and GET commands via Java code.




To keep the example simple, we will implement ApplicationRunner our class with @SpringBootApplication and override the run() method and write our code there.




package com.example.redisdemo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.redis.core.RedisTemplate;

@SpringBootApplication
public class RedisSetGetDemoApplication implements ApplicationRunner {

    @Autowired
    public RedisTemplate redisTemplate;

    public static void main(String[] args) {
        SpringApplication.run(RedisSetGetDemoApplication.class, args);

    }

    @Override
    public void run(ApplicationArguments args) throws Exception {

        //SET Example: SET message Hello
        redisTemplate.opsForValue().set("message", "Hello");

        //GET Example: GET message
        System.out.println(redisTemplate.opsForValue().get("message"));
    }
}




As you would have seen in the above code, to make use of SET, we use the method opsForValue().set() from the RedisTemplate, and similarly opsForValue().get() for GET Command.

Output: