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名师互学网 > IT > 软件开发 > 后端开发 > Java

第二章 SpringBoot使用redis

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第二章 SpringBoot使用redis

1.在pom.xml 添加

 
            org.springframework.boot
            spring-boot-starter-data-redis
  
  
            com.fasterxml.jackson.module
            jackson-module-jaxb-annotations
  

2 .在application.yml 中配置reids

spring:
	redis:
	    database: 2
	    host: localhost
	    port: 6379
	    lettuce:
	      pool:
	        max-active: 8
	        max-idle: 8
	        max-wait: -1ms
	      shutdown-timeout: 100ms

3.编写redis.config.java

package org.example.redis.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.annotation.EnableCaching;
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.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.*;

import java.time.Duration;

@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {

@Bean
public RedisTemplate redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {
    // 设置序列化
    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);
    // 配置redisTemplate
    RedisTemplate redisTemplate = new RedisTemplate<>();
    redisTemplate.setConnectionFactory(lettuceConnectionFactory);
    RedisSerializer stringSerializer = new StringRedisSerializer();
    redisTemplate.setKeySerializer(stringSerializer);// key序列化
    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);// value序列化
    redisTemplate.setHashKeySerializer(stringSerializer);// Hash key序列化
    redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);// Hash value序列化
    redisTemplate.afterPropertiesSet();
    return redisTemplate;
}


@Bean
public CacheManager cacheManager(LettuceConnectionFactory factory) {
    // 配置序列化(缓存默认有效期 6小时)
    RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofHours(6));
    RedisCacheConfiguration redisCacheConfiguration = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
            .serializevaluesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));

    return RedisCacheManager.builder(factory).cacheDefaults(redisCacheConfiguration).build();
}
 

}

4.编写测试代码
@GetMapping(“testR”)
public String getList() {
redisTemplate.opsForList().leftPush(“list1”, “a”);
redisTemplate.opsForList().leftPush(“list1”, “b”);
redisTemplate.opsForList().leftPush(“list1”, “c”);
redisTemplate.opsForList().leftPush(“list1”, “d”);
}
查看效果

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