目录
一、Spring Data Redis使用方式
1.1 介绍
1.2 配置
1.3 RedisTemplate
二、环境搭建
2.1 导入Spring Data Redis的maven坐标
2.2 配置Redis数据源
2.3 编写配置类,创建RedisTemplate对象
三、操作常见类型数据
3.1 操作字符串类型数据
3.2 操作哈希类型数据
3.3 操作列表类型数据
3.4 操作集合类型数据
3.5 操作有序集合类型数据
3.6 通用命令操作
Spring Data Redis 是 Spring 的一部分,提供了在 Spring 应用中通过简单的配置就可以访问 Redis 服务,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 Redis 操作。
网址:Spring Data Redis
Spring Boot提供了对应的Starter,maven坐标:
org.springframework.boot
spring-boot-starter-data-redis
Spring Data Redis中提供了一个高度封装的类:RedisTemplate,对相关api进行了归类封装,将同一类型操作封装为operation接口,具体分类如下:
ValueOperations:string数据操作
SetOperations:set类型数据操作
ZSetOperations:zset类型数据操作
HashOperations:hash类型的数据操作
ListOperations:list类型的数据操作
org.springframework.boot
spring-boot-starter-data-redis
在application-dev.yml中添加:
sky:
redis:
host: localhost
port: 6379
password: 123456
database: 10
解释说明:
database:指定使用Redis的哪个数据库,Redis服务启动后默认有16个数据库,编号分别是从0到15。
可以通过修改Redis配置文件来指定数据库的数量。
在application.yml中添加读取application-dev.yml中的相关Redis配置
spring:
profiles:
active: dev
redis:
host: ${sky.redis.host}
port: ${sky.redis.port}
password: ${sky.redis.password}
database: ${sky.redis.database}
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){
log.info("开始创建redis模板对象...");
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;
}
}
解释说明:
当前配置类不是必须的,因为 Spring Boot 框架会自动装配 RedisTemplate 对象,但是默认的key序列化器为
JdkSerializationRedisSerializer,导致我们存到Redis中后的数据和原始数据有差别,故设置为
StringRedisSerializer序列化器。
/**
* 操作字符串类型的数据
*/
@Test
public void testString(){
// set get setex setnx
redisTemplate.opsForValue().set("name","小明");
String city = (String) redisTemplate.opsForValue().get("name");
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();
hashOperations.put("100","name","tom");
hashOperations.put("100","age","20");
String name = (String) hashOperations.get("100", "name");
System.out.println(name);
Set keys = hashOperations.keys("100");
System.out.println(keys);
List values = hashOperations.values("100");
System.out.println(values);
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();
listOperations.leftPushAll("mylist","a","b","c");
listOperations.leftPush("mylist","d");
List mylist = listOperations.range("mylist", 0, -1);
System.out.println(mylist);
listOperations.rightPop("mylist");
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();
setOperations.add("set1","a","b","c","d");
setOperations.add("set2","a","b","x","y");
Set members = setOperations.members("set1");
System.out.println(members);
Long size = setOperations.size("set1");
System.out.println(size);
Set intersect = setOperations.intersect("set1", "set2");
System.out.println(intersect);
Set union = setOperations.union("set1", "set2");
System.out.println(union);
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();
zSetOperations.add("zset1","a",10);
zSetOperations.add("zset1","b",12);
zSetOperations.add("zset1","c",9);
Set zset1 = zSetOperations.range("zset1", 0, -1);
System.out.println(zset1);
zSetOperations.incrementScore("zset1","c",10);
zSetOperations.remove("zset1","a","b");
}
/**
* 通用命令操作
*/
@Test
public void testCommon(){
//keys exists type del
Set keys = redisTemplate.keys("*");
System.out.println(keys);
Boolean name = redisTemplate.hasKey("name");
Boolean set1 = redisTemplate.hasKey("set1");
for (Object key : keys) {
DataType type = redisTemplate.type(key);
System.out.println(type.name());
}
redisTemplate.delete("mylist");
}