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Redis-14.在Java中操作Redis-Spring Data Redis使用方式-操作列表类型的数据

news 2025/7/5 19:31:04

一.操作列表类型的数据

package com.sky.test;

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

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

@SpringBootTest
public class SpringDataRedisTest {
    @Autowired
    private RedisTemplate redisTemplate;

    @Test
    public void testRedisTemplate() {
        System.out.println(redisTemplate);  // 首先输出redisTemplate对象看是否为空
        ValueOperations valueOperations = redisTemplate.opsForValue();  // redis当中的字符串类型数据操作对象
        HashOperations hashOperations = redisTemplate.opsForHash();     // redis当中的哈希类型数据操作对象
        ListOperations listOperations = redisTemplate.opsForList();     // redis当中的列表类型数据操作对象
        SetOperations setOperations = redisTemplate.opsForSet();        // redis当中的集合类型数据操作对象
        ZSetOperations zSetOperations = redisTemplate.opsForZSet();     // redis当中的有序集合类型数据操作对象
    }

    /*
        操作字符串类型的数据
     */
    @Test
    public void testString() {
        // set get setex setnx
        redisTemplate.opsForValue().set("city","北京");   // set
        String city = (String) redisTemplate.opsForValue().get("city");// get
        System.out.println(city);
        redisTemplate.opsForValue().set("code","1234",3, TimeUnit.MINUTES);     // setex
        redisTemplate.opsForValue().setIfAbsent("lock","1");   // setnx
        redisTemplate.opsForValue().setIfAbsent("lock","2");
    }

    /*
        操作哈希类型的数据
     */
    @Test
    public void testHash() {
        // hset hget hdel hkeys hvals
        HashOperations hashOperations = redisTemplate.opsForHash();
        hashOperations.put("100","name","Rose");    // put(Object key,Object hashKey,Object value)
        hashOperations.put("100","age","22");   // 对应hset
        String name = (String) hashOperations.get("100", "name");   // 对应hget
        System.out.println(name);

        Set keys = hashOperations.keys("100");      // 对应hkeys
        System.out.println(keys);

        List values = hashOperations.values("100");     // 对应hvals
        System.out.println(values);

        hashOperations.delete("100","name");  // 对应hdel
    }

    /*
        操作列表类型的数据
     */
    @Test
    public void testList() {
        ListOperations listOperations = redisTemplate.opsForList();
        // leftPushAll(Object key, Object ...values)：一次往列表中插入多个元素
        listOperations.leftPushAll("mylist","a","b","c");

        // leftPush(Object key, Object value)：往列表中插入单个元素
        listOperations.leftPush("mylist","d");

        // range(Object key,Long start, Long end)：获取列表指定范围内的元素，并构成一个列表
        List mylist = listOperations.range("mylist", 0, -1);
        System.out.println(mylist);

        // rightPop(Object key)：移除并获取列表的最后一个元素
        String rightPop = (String) listOperations.rightPop("mylist");
        System.out.println(rightPop);

        // size(Object key)：获取列表长度
        Long length = listOperations.size("mylist");
        System.out.println(length);
    }
}