RedisTemplate操作Redis数据结构-字符串类型

Posted 2020-11-22 HEAVEN_1

SpringBoot中使用RedisTemplate执行Redis基本命令

在application.properties或application.yml文件中配置Redis

spring:
  redis:
    host: 127.0.0.1
    port: 6379

编写代码

package com.heaven.redis;

import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.test.context.junit4.SpringRunner;
import redis.clients.jedis.Jedis;
@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j
class RedisApplicationTests {

    @Autowired
    RedisTemplate redisTemplate;

    @Test
    void testString(){
        //设置生成key value的序列化策略
        RedisSerializer<String> stringSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringSerializer);
        redisTemplate.setValueSerializer(stringSerializer);
        redisTemplate.setHashKeySerializer(stringSerializer);
        redisTemplate.setHashValueSerializer(stringSerializer);
        //设值(set key value)
        redisTemplate.opsForValue().set("key1","value1");
        //通过key取值(get key)
        String key1 = (String) redisTemplate.opsForValue().get("key1");
        redisTemplate.opsForValue().set("key2","value2");
        log.info("key1======"+key1);
        redisTemplate.delete("key1");
        String key2 = (String) redisTemplate.opsForValue().get("key2");
        log.info("key2======"+key2);
        //获取key对应的value的长度(strlen key)
        Long size = redisTemplate.opsForValue().size("key2");
        log.info("size======"+size);
        //给key重新设值(getset key value)
        String getSet = (String) redisTemplate.opsForValue().getAndSet("key2", "start_value2");
        log.info("getSet======"+getSet);
        //根据下标获取value的子串(getrange key start end)
        String range = redisTemplate.opsForValue().get("key2", 0, 5);
        log.info("range======"+range);
        //在value尾部添加字符(append key value)
        Integer end = redisTemplate.opsForValue().append("key2", "_end");
        log.info("end======"+end);
    }

}

运行结果