自学内容网 自学内容网

Redis笔记(基本操作+Java实现)

Redis是什么

一种数据库,但是不是mysql那样的表格,而是key-value的形式存储,而且它存在内存里,所以读写速度更快。

Redis常用数据类型 

Redis常用命令简单使用

字符串操作

set name x
get name

 哈希操作

列表操作

集合操作

 有序集合操作

 通用操作

 在Java中操作Redis

配置Redis数据源 

方法1

application.yml下的datasource

    redis:
      host: localhost
      port: 6379
      database: 0

方法2(推荐)

 

配置类

package com.sky.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
@Slf4j
public class RedisConfiguration {
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory){
        RedisTemplate redisTemplate = new RedisTemplate();
        //设置redis的连接工厂对象
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        //设置redis key的序列化器
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        return redisTemplate;
    }
}

写一个测试类看看是否好使

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.RedisTemplate;

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

    @Test
    public void testRedisTemplate(){
        System.out.println(redisTemplate);
    }
}

在测试类里的运行结果

 在java中操作字符串类型

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.concurrent.TimeUnit;

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

    @Test
    public void testRedisTemplate(){
        System.out.println(redisTemplate);
        ValueOperations valueOperations=redisTemplate.opsForValue();
        HashOperations hashOperations = redisTemplate.opsForHash();
        ListOperations listOperations = redisTemplate.opsForList();
        SetOperations setOperations = redisTemplate.opsForSet();
        ZSetOperations zSetOperations = redisTemplate.opsForZSet();
    }

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

 

 

 在java中操作哈希类型 


    /**
     * 哈希
     */
    @Test
    public void testHash(){
        HashOperations hashOperations = redisTemplate.opsForHash();
        //hset
        hashOperations.put("100","name","tom");
        hashOperations.put("100","age","20");

        //hget
        String name = (String) hashOperations.get("100", "name");
        System.out.println(name);

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

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

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

在java中操作列表类型数据

 在java中操作集合类型数据

 在java中操作有序集合类型数据

在java中通用命令操作

 


原文地址:https://blog.csdn.net/yesyesyes_yes/article/details/142438469

免责声明:本站文章内容转载自网络资源,如本站内容侵犯了原著者的合法权益,可联系本站删除。更多内容请关注自学内容网(zxcms.com)!