黑马课程Redis笔记,供个人复习用,若有侵权,联系删除
Redis是一个基于内存的key-value结构数据库,即非关系型数据库,与MySQL二维表格数据库不同。并不是取代MySQL,而是对MySQL的补充
链接:https://pan.baidu.com/s/1mIxr8IEWj-vdLSl7EJnovw?pwd=w8ah
提取码:w8ah
①启动Redis服务端:redis-server.exe redis.windows.conf
②启动客户端,连接Redis服务:redis-cli.exe (默认连接本地Redis服务,即6379
测试Redis服务启动是否正确:keys *
③也可以连接指定IP和端口号的Redis服务
④更改redis服务的密码
⑤重新启动redis服务,再启动客户端,输入密码,连接服务
链接:https://pan.baidu.com/s/1gwBh5AcMagAKHEk5W5vEQw?pwd=umxc
提取码:umxc
Redis存储的是key-value结构的数据,其中key是字符串类型,value有5种常用的数据类型:
Redis hash是一个string类型的field和value的映射表,hash特别适合用于存储对象,常用命令:
Redis列表是简单的字符串列表,按照插入顺序排序,常用命令:
Redis set是string类型的无序集合。集合成员是唯一的,集合中不能出现重复的数据,常用命令:
Redis有序集合是string类型元素的集合,且不允许有重复成员。每个元素都会关联一个double类型的分数。常用命令:
Redis的Java客户端很多,常用的几种:
spring Data Redis是spring的一部分,对Redis 底层开发包进行了高度封装。在spring项目中,可以使用spring Data Redis来简化操作。
操作步骤:
org.springframework.boot
spring-boot-starter-data-redis
spring:
# redis配置
redis:
host: localhost
port: 6379
password: 123456
database: 0
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;
/**
* Redis配置类
*/
@Configuration
@Slf4j
public class RedisConfiguration {
@Bean
public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory){
RedisTemplate redisTemplate = new RedisTemplate();
//设置Redis的连接工厂
redisTemplate.setConnectionFactory(redisConnectionFactory);
//设置Redis key的序列化器
redisTemplate.setKeySerializer(new StringRedisSerializer());
return redisTemplate;
}
}
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 testRedistTemplate() {
System.out.println(redisTemplate);
ValueOperations valueOperations = redisTemplate.opsForValue();//字符串
ListOperations listOperations = redisTemplate.opsForList();//列表
HashOperations hashOperations = redisTemplate.opsForHash();//哈希
SetOperations setOperations = redisTemplate.opsForSet();//集合
ZSetOperations zSetOperations = redisTemplate.opsForZSet();//有序集合
}
/**
* 操作字符串类型的数据
*/
@Test
public void testString(){
// set get setex setnx
redisTemplate.opsForValue().set("city", "潜江");
String city = (String) redisTemplate.opsForValue().get("city");
System.out.println(city);
redisTemplate.opsForValue().set("code", "1234", 3, TimeUnit.MINUTES);
redisTemplate.opsForValue().setIfAbsent("lock", "1");
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();
//hset
hashOperations.put("100", "name", "张三");
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");
}
/**
* 操作列表类型的数据
*/
@Test
public void testList() {
//lpush lrange rpop llen
ListOperations listOperations = redisTemplate.opsForList();
//lpush
listOperations.leftPushAll("mylist", "a", "b", "c");
listOperations.leftPush("mylist", "d");
//lrange
List mylist = listOperations.range("mylist", 0, -1);
System.out.println(mylist);
//rpop
listOperations.rightPop("mylist");
//llen
Long size = listOperations.size("mylist");
System.out.println(size);
}
/**
* 操作集合类型的数据
*/
@Test
public void testSet() {
//sadd smembers scard sinter sunion srem
SetOperations setOperations = redisTemplate.opsForSet();
//sadd
setOperations.add("set1", "a", "b", "c", "d");
setOperations.add("set2", "a", "b", "x", "y");
//smembers
Set set1 = setOperations.members("set1");
System.out.println(set1);
//scard
Long size = setOperations.size("set1");
System.out.println(size);
//sinter
Set intersect = setOperations.intersect("set1", "set2");
System.out.println(intersect);
//sunion
Set union = setOperations.union("set1", "set2");
System.out.println(union);
//srem
setOperations.remove("set1", "a", "b");
}
/**
* 操作有序集合类型的数据
*/
@Test
public void testZset() {
//zadd zrange zincrby zrem
ZSetOperations zSetOperations = redisTemplate.opsForZSet();
//zadd
zSetOperations.add("zset1", "a", 10);
zSetOperations.add("zset1", "b", 12);
zSetOperations.add("zset1", "c", 9);
//zrange
Set zset1 = zSetOperations.range("zset1", 0, -1);
System.out.println(zset1);
//zincrby
zSetOperations.incrementScore("zset1", "c", 10);
//zrem
zSetOperations.remove("zset1", "a","b");
}
/**
* 通用命令操作
*/
@Test
public void testCommon() {
//keys exists type del
//keys
Set keys = redisTemplate.keys("*");
System.out.println(keys);
//exists
Boolean name = redisTemplate.hasKey("name");
Boolean set1 = redisTemplate.hasKey("set1");
//type
for (Object key: keys) {
DataType type = redisTemplate.type(key);
System.out.println(type.name());
}
//del
redisTemplate.delete("mylist");
}