Springboot在1.x使用的是jedis框架,在2.x改为默认使用Lettuce框架与redis连接。
关于jedis跟lettuce的区别:
实现步骤:
1.添加springboot操作redis相关依赖。
<!--springboot2.x以后默认使用lettuce-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- redis依赖commons-pool 这个依赖一定要添加 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>
<!-- 测试库依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
2.在application.yml添加lettuce配置
spring:
redis:
port: 6379
password: 123456
host: 127.0.0.1
lettuce:
pool:
max-active: 8 # 连接池大连接数(使用负值表示没有限制)
max-idle: 8 # 连接池中的大空闲连接
min-idle: 0 # 连接池中的小空闲连接
max-wait: 1000 # 连接池大阻塞等待时间(使用负值表示没有限制)
shutdown-timeout: 100 # 关闭超时时间
3.在config包下新建RedisConfig
package com.oracle.springbootdemo.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.lang.reflect.Method;
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
/**
* 自定义缓存key的生成策略。默认的生成策略是看不懂的(乱码内容) 通过Spring 的依赖注入特性进行自定义的 配置注入并且此类是一个配置类可以更多程度的自定义配置
*
* @return
*/
@Bean
@Override
public KeyGenerator keyGenerator() {
return new KeyGenerator() {
@Override
public Object generate(Object target, Method method, Object... params) {
StringBuilder sb = new StringBuilder();
sb.append(target.getClass().getName());
sb.append(method.getName());
for (Object obj : params) {
sb.append(obj.toString());
}
return sb.toString();
}
};
}
/**
*
* 缓存配置管理器
*/
@Bean
public CacheManager cacheManager(LettuceConnectionFactory factory) {
//以锁写入的方式创建RedisCacheWriter对象
RedisCacheWriter writer = RedisCacheWriter.lockingRedisCacheWriter(factory);
//创建默认缓存配置对象
RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
RedisCacheManager cacheManager = new RedisCacheManager(writer, config);
return cacheManager;
}
@Bean
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(factory);
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);
StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
// 在使用注解@Bean返回RedisTemplate的时候,同时配置hashKey与hashValue的序列化方式。
// key采用String的序列化方式
template.setKeySerializer(stringRedisSerializer);
// value序列化方式采用jackson
template.setValueSerializer(jackson2JsonRedisSerializer);
// hash的key也采用String的序列化方式
template.setHashKeySerializer(stringRedisSerializer);
// hash的value序列化方式采用jackson
template.setHashValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
}
后面的编写Controller的测试用例与上节jedis方式完全一样。RedisTemplate常用方法也与上小节完全相同,请大家自行参考。