redis 光速入门和java操作redis
linux拉取dokcer镜像
docker pull redis
主目录创建文件夹做redis的映射,这里先创建是因为docker不存在redis.conf
如果直接映射会当作目录而不是文件
mkdir -p /mydata/redis/conf
touch /mydata/redis/conf/redis.conf
根据镜像创建容器 建议修改映射端口这把修改问9736
docker run -p 9736:6379 --name redis -v /mydata/redis/data:/data \
-v/mydata/redis/conf/redis.conf:/etc/redis/redis.conf \
-d redis redis-server /etc/redis/redis.conf
使用RedisDesktopManager,测试连接
redis完成
使用Java操作redis
maven导入依赖
<!-- spring boot redis缓存引入 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- 缓存连接池-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>
<!-- redis 存储 json序列化 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
yml添加配置
spring:
redis:
host: 192.168.100.100
port: 6379
database: 0
password: 123456 #默认为空
timeout: 3000ms #最大等待时间,超时则抛出异常,否则请求一直等待
lettuce:
pool:
max-active: 20 #最大连接数,负值表示没有限制,默认8
max-wait: -1 #最大阻塞等待时间,负值表示没限制,默认-1
max-idle: 8 #最大空闲连接,默认8
min-idle: 0 #最小空闲连接,默认0
测试存入
package com.atguigu.srb.core;
@SpringBootTest
@RunWith(SpringRunner.class)
public class RedisTemplateTests {
@Resource
private RedisTemplate redisTemplate;
@Resource
private DictMapper dictMapper;
@Test
public void saveDict(){
Dict dict = dictMapper.selectById(1);
//向数据库中存储string类型的键值对, 过期时间5分钟
redisTemplate.opsForValue().set("dict", dict, 5, TimeUnit.MINUTES);
}
}
使用json序列化
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory redisConnectionFactory) {
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(redisConnectionFactory);
//首先解决key的序列化方式
StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
redisTemplate.setKeySerializer(stringRedisSerializer);
//解决value的序列化方式
Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
//序列化时将类的数据类型存入json,以便反序列化的时候转换成正确的类型
ObjectMapper objectMapper = new ObjectMapper();
//objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
objectMapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL);
// 解决jackson2无法反序列化LocalDateTime的问题
objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
objectMapper.registerModule(new JavaTimeModule());
jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
return redisTemplate;
}
}
重新存入
取值测试
@Test
public void getDict(){
Dict dict = (Dict)redisTemplate.opsForValue().get("dict");
System.out.println(dict);
}