Redis - 6. SpringBoot integrates Redis

1. Introduce the maven configuration of redis

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

2. Configure redis information in application.properties

# redis 服务器 ip
spring.redis.host=192.168.200.129
# redis 服务器端口
spring.redis.port=6379
# redis 密码
#spring.redis.password=root
# 连接超时时间（毫秒）
spring.redis.timeout=60000
# Redis默认情况下有16个分片，这里配置具体使用的分片，默认是0
spring.redis.database=0

3. Use the RedisTemplate tool class to operate redis

RedisTemplate is used in springboot to operate redis, and this object needs to be injected into our bean. The code is as follows:

@Autowired
private RedisTemplate<String, String> redisTemplate;

// 用下面5个对象来操作对应的类型
this.redisTemplate.opsForValue(); //提供了操作string类型的所有方法
this.redisTemplate.opsForList(); // 提供了操作list类型的所有方法
this.redisTemplate.opsForSet(); //提供了操作set的所有方法
this.redisTemplate.opsForHash(); //提供了操作hash表的所有方法
this.redisTemplate.opsForZSet(); //提供了操作zset的所有方法

4. RedisTemplate sample code

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * @className RedisController
 * @date 2022/6/21
 **/
@RestController
@RequestMapping("/redis")
public class RedisController {
    @Autowired
    private RedisTemplate<String, String> redisTemplate;

    @RequestMapping("/stringTest")
    public String stringTest() {
        this.redisTemplate.delete("name");
        this.redisTemplate.opsForValue().set("name", "路人");
        String name = this.redisTemplate.opsForValue().get("name");
        return name;
    }

    @RequestMapping("/listTest")
    public List<String> listTest() {
        this.redisTemplate.delete("names");
        this.redisTemplate.opsForList().rightPushAll("names", "刘德华", "张学友", "郭富城", "黎明");
        List<String> courses = this.redisTemplate.opsForList().range("names", 0, -1);
        return courses;
    }

    @RequestMapping("setTest")
    public Set<String> setTest() {
        this.redisTemplate.delete("courses");
        this.redisTemplate.opsForSet().add("courses", "java", "spring", "springboot");
        Set<String> courses = this.redisTemplate.opsForSet().members("courses");
        return courses;
    }

    @RequestMapping("hashTest")
    public Map<Object, Object> hashTest() {
        this.redisTemplate.delete("userMap");
        Map<String, String> map = new HashMap<>();
        map.put("name", "路人");
        map.put("age", "30");
        this.redisTemplate.opsForHash().putAll("userMap", map);
        Map<Object, Object> userMap = this.redisTemplate.opsForHash().entries("userMap");
        return userMap;
    }

    @RequestMapping("zsetTest")
    public Set<String> zsetTest() {
        this.redisTemplate.delete("languages");
        this.redisTemplate.opsForZSet().add("languages", "java", 100d);
        this.redisTemplate.opsForZSet().add("languages", "c", 95d);
        this.redisTemplate.opsForZSet().add("languages", "php", 70);
        Set<String> languages = this.redisTemplate.opsForZSet().range("languages", 0, -1);
        return languages;
    }

}