今天小编给大家分享一下Java操作Redis的方法是什么的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
Jedis操作Redis
创建idea工程
建立一个Maven项目，导入Jedis依赖即可：
<!-- 导入Jedis依赖 --> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.2.0</version> </dependency>
导入依赖之后创建JedisDemo测试类
package com.vleus.jedis;
import redis.clients.jedis.Jedis;
/**
* @author vleus
* @date 2021年07月03日 23:52
*/
public class JedisDemo1 {
public static void main(String[] args) {
//创建Jedis对象
Jedis jedis = new Jedis("192.168.37.139",6379);
//测试Jedis客户端是否能够连接上Redis
System.out.println(jedis.ping());
}
}输出PONG表示连接成功~
注意：
第一次测试时如果连接不上虚拟机的Redis，报连接不上的异常有两个问题需要解决：
首先，kill掉Redis的进程，然后修改Reids的启动使用的配置文件
注释掉bind的配置；
同时将protected-mode的值改为no
第二步，关掉Linux的防火墙（这里仅是在做学习时使用，生产环境别这么干）
systemctl stop firewalld systemctl disable firewalld
反正我是这么解决的。
Jedis操作Redis
1、创建idea springboot项目，引入依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- spring-boot-redis -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- spring2.x继承redis需要commons-pool -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.3</version>
</dependency>
</dependencies>2、创建RedisConfig配置类
@EnableCaching
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
RedisSerializer<String> redisSerializer = new StringRedisSerializer();
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
template.setConnectionFactory(factory);
//key序列化方式
template.setKeySerializer(redisSerializer);
//value序列化
template.setValueSerializer(jackson2JsonRedisSerializer);
//value hashmap序列化
template.setHashValueSerializer(jackson2JsonRedisSerializer);
return template;
}
@Bean
public CacheManager cacheManager(RedisConnectionFactory factory) {
RedisSerializer<String> redisSerializer = new StringRedisSerializer();
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
//解决查询缓存转换异常的问题
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
// 配置序列化（解决乱码的问题）,过期时间600秒
RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(600))
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
.disableCachingNullValues();
RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
.cacheDefaults(config)
.build();
return cacheManager;
}
}简单的Controller测试
/**
* @author vleus
* @date 2021年07月04日 13:06
*/
@RestController
@RequestMapping(value = "/redisTest")
public class RedisTestController {
@Resource
private RedisTemplate redisTemplate;
@GetMapping
public String testRedis() {
//设置值到redis
redisTemplate.opsForValue().set("name","jack");
//从redis中获取值
String name = (String) redisTemplate.opsForValue().get("name");
return name;
}
}