redis05 sprngboot整合redis

redis的Java客户端

整合步骤

添加redis的pom依赖

<!-- 引入redis依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
 
<!-- 引入redis连接池的依赖 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

配置文件配置

spring:
  redis:
    database: 0
    host: 127.0.0.1
    port: 6379
    password：
    timeout: 5000
    lettuce:
      pool:
        max-active: 32
        max-wait: -1
        max-idle: 16
        min-idle: 8

编写配置类

import com.alibaba.fastjson.support.spring.FastJsonRedisSerializer;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
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.RedisOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;
 
/**
 * @author LH
 **/
@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
public class RedisConfig {
 
    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        //使用fastjson序列化
        FastJsonRedisSerializer<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<>(Object.class);
        // value值的序列化采用fastJsonRedisSerializer
        template.setValueSerializer(fastJsonRedisSerializer);
        template.setHashValueSerializer(fastJsonRedisSerializer);
        // key的序列化采用StringRedisSerializer
        template.setKeySerializer(new StringRedisSerializer());
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
 
    @Bean
    @ConditionalOnMissingBean(StringRedisTemplate.class)
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
}

编写redis工具类RedisUtil.java

import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import org.apache.commons.lang3.BooleanUtils;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Component;
 
import javax.annotation.Resource;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
 
/**
 * Redis常用的一些操作
 *
 * @author LH
 */
@Component
public class RedisUtil {
 
    @Resource
    private RedisTemplate<String, Object> redisTemplate;
 
    /**
     * 写入缓存
     */
    public boolean set(final String key, Object value) {
        boolean result = false;
        try {
            ValueOperations<String, Object> operations = redisTemplate.opsForValue();
            operations.set(key, value);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
 
    /**
     * 写入缓存设置时效时间
     */
    public boolean set(final String key, Object value, Long expireTime) {
        boolean result = false;
        try {
            ValueOperations<String, Object> operations = redisTemplate.opsForValue();
            operations.set(key, value);
            redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
 
    /**
     * 更新缓存
     */
    public boolean getAndSet(final String key, String value) {
        boolean result = false;
        try {
            redisTemplate.opsForValue().getAndSet(key, value);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
 
    /**
     * 批量删除对应的value
     */
    public void remove(final String... keys) {
        for (String key : keys) {
            remove(key);
        }
    }
 
    /**
     * 批量删除key
     */
    public void removePattern(final String pattern) {
        Set<String> keys = redisTemplate.keys(pattern);
        if (CollectionUtils.isNotEmpty(keys)) {
            redisTemplate.delete(keys);
        }
    }
 
    /**
     * 删除对应的value
     */
    public void remove(final String key) {
        if (exists(key)) {
            redisTemplate.delete(key);
        }
    }
 
    /**
     * 判断缓存中是否有对应的value
     */
    public boolean exists(final String key) {
        Boolean isExists = redisTemplate.hasKey(key);
        return BooleanUtils.isTrue(isExists);
    }
 
    /**
     * 读取缓存
     */
    public Object get(final String key) {
        ValueOperations<String, Object> operations = redisTemplate.opsForValue();
        return operations.get(key);
    }
 
    /**
     * 哈希 添加
     */
    public void hmSet(String key, Object hashKey, Object value) {
        HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
        hash.put(key, hashKey, value);
    }
 
    /**
     * 哈希获取数据
     */
    public Object hmGet(String key, Object hashKey) {
        HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
        return hash.get(key, hashKey);
    }
 
    /**
     * 列表添加
     */
    public void lPush(String k, Object v) {
        ListOperations<String, Object> list = redisTemplate.opsForList();
        list.rightPush(k, v);
    }
 
    /**
     * 列表获取
     */
    public List<Object> lRange(String k, long l, long l1) {
        ListOperations<String, Object> list = redisTemplate.opsForList();
        return list.range(k, l, l1);
    }
 
    /**
     * 集合添加
     */
    public void addSet(String key, Object value) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        set.add(key, value);
    }
 
    /**
     * 删除集合下的所有值
     */
    public void removeSetAll(String key) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        Set<Object> objectSet = set.members(key);
        if (objectSet != null && !objectSet.isEmpty()) {
            for (Object o : objectSet) {
                set.remove(key, o);
            }
        }
    }
 
    /**
     * 判断set集合里面是否包含某个元素
     */
    public Boolean isMember(String key, Object member) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        return set.isMember(key, member);
    }
 
    /**
     * 集合获取
     */
    public Set<Object> setMembers(String key) {
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        return set.members(key);
    }
 
    /**
     * 有序集合添加
     */
    public void zAdd(String key, Object value, double source) {
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        zset.add(key, value, source);
    }
 
    /**
     * 有序集合获取指定范围的数据
     */
    public Set<Object> rangeByScore(String key, double source, double source1) {
        ZSetOperations<String, Object> zSet = redisTemplate.opsForZSet();
        return zSet.rangeByScore(key, source, source1);
    }
 
    /**
     * 有序集合升序获取
     */
    public Set<Object> range(String key, Long source, Long source1) {
        ZSetOperations<String, Object> zSet = redisTemplate.opsForZSet();
        return zSet.range(key, source, source1);
    }
 
    /**
     * 有序集合降序获取
     */
    public Set<Object> reverseRange(String key, Long source, Long source1) {
        ZSetOperations<String, Object> zSet = redisTemplate.opsForZSet();
        return zSet.reverseRange(key, source, source1);
    }
}

redis Key过期处理事件

修改redis的配置文件

看一下notify-keyspace-events Ex是否被注释（默认是注释），放开注释即可。

修改RedisConfig.java

import com.alibaba.fastjson.support.spring.FastJsonRedisSerializer;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
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.RedisOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
 
/**
 * @Description redis配置
 * @Author LH
 **/
@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
public class RedisConfig
{
 
    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)
    {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        //使用fastjson序列化
        FastJsonRedisSerializer<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<>(Object.class);
        // value值的序列化采用fastJsonRedisSerializer
        template.setValueSerializer(fastJsonRedisSerializer);
        template.setHashValueSerializer(fastJsonRedisSerializer);
        // key的序列化采用StringRedisSerializer
        template.setKeySerializer(new StringRedisSerializer());
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
 
    @Bean
    @ConditionalOnMissingBean(StringRedisTemplate.class)
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)
    {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
 
    /**
     * 开启监听redis Key过期事件
     */
    @Bean
    public RedisMessageListenerContainer redisMessageListenerContainer(RedisConnectionFactory connectionFactory)
    {
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        return container;
    }
}

定义过期监听器RedisKeyExpireListener

import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.listener.KeyExpirationEventMessageListener;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
 
/**
 * @Description redis过期监听器
 * @Author LH
 **/
@Slf4j
public class RedisKeyExpireListener extends KeyExpirationEventMessageListener
{
 
    public RedisKeyExpireListener(RedisMessageListenerContainer listenerContainer)
    {
        super(listenerContainer);
    }
 
    @Override
    public void onMessage(Message message, byte[] pattern)
    {
        String expireKey = message.toString();
        // 根据过期的key处理对应的业务逻辑
        log.info(expireKey + "已过期-------------------");
    }
}