# 更新apt
sudo apt update
# 安裝Redis
sudo apt-get install redis-server
# 設(shè)置密碼（在配置文件redis.conf中，位置在 /etc/redis/redis.conf)
requirepass ******
# 啟動(dòng)Redis服務(wù)
service redis-server start
# 停止Redis服務(wù)
service redis-server stop
# 重啟Redis服務(wù)
service redis-server restart
# 啟動(dòng)Redis客戶端
redis-cli
# 測(cè)試Redis是否連接
127.0.0.1:6379> ping

# 修改保護(hù)模式為no
# protected-mode yes
protected-mode no
# 若不修改可能無法連接Redis，出現(xiàn)以下錯(cuò)誤
org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to 127.0.0.1:6379
        at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.translateException(LettuceConnectionFactory.java:1689)
        at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.getConnection(LettuceConnectionFactory.java:1597)
······
······
······
Caused by: io.lettuce.core.RedisConnectionException: Unable to connect to 127.0.0.1:6379
        at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:78)
        at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:56)
······
······
······
Caused by: java.lang.IllegalStateException: RedisHandshakeHandler not registered
        at io.lettuce.core.AbstractRedisClient.lambda$initializeChannelAsync0$6(AbstractRedisClient.java:431)
        at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:590)
······
······
······

<!-- Redis -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

# Redis
redis:
# 服務(wù)器地址
host: 127.0.0.1
# 服務(wù)器端口號(hào)
port: 6379
# 使用的數(shù)據(jù)庫(kù)索引
database: 0
# 連接超時(shí)時(shí)間
timeout: 10000
# 設(shè)置密碼
password: ******
lettuce:
  # 連接池
  pool:
    # 最大阻塞等待時(shí)間，負(fù)數(shù)表示沒有限制
    max-wait: -1
    # 連接池中最大空閑
    max-idle: 5
    # 連接池中最小空閑
    min-idle: 0
    # 連接池最大連接數(shù)
    max-active: 20

package cn.huskysir.Config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
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.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.*;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@Configuration
@EnableCaching //開啟注解
public class RedisConfig extends CachingConfigurerSupport {
    /**
     * retemplate相關(guān)配置
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        // 配置連接工廠
        template.setConnectionFactory(factory);
        //使用Jackson2JsonRedisSerializer來序列化和反序列化redis的value值（默認(rèn)使用JDK的序列化方式）
        Jackson2JsonRedisSerializer jacksonSeial = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        // 指定要序列化的域，field,get和set,以及修飾符范圍，ANY是都有包括private和public
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 指定序列化輸入的類型，類必須是非final修飾的，final修飾的類，比如String,Integer等會(huì)跑出異常
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jacksonSeial.setObjectMapper(om);
        // 值采用json序列化
        template.setValueSerializer(jacksonSeial);
        //使用StringRedisSerializer來序列化和反序列化redis的key值
        template.setKeySerializer(new StringRedisSerializer());
        // 設(shè)置hash key 和value序列化模式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(jacksonSeial);
        template.afterPropertiesSet();
        return template;
    }
    /**
     * 對(duì)hash類型的數(shù)據(jù)操作
     */
    @Bean
    public HashOperations<String, String, Object> hashOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForHash();
    }
    /**
     * 對(duì)redis字符串類型數(shù)據(jù)操作
     */
    @Bean
    public ValueOperations<String, Object> valueOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForValue();
    }
    /**
     * 對(duì)鏈表類型的數(shù)據(jù)操作
     */
    @Bean
    public ListOperations<String, Object> listOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForList();
    }
    /**
     * 對(duì)無序集合類型的數(shù)據(jù)操作
     */
    @Bean
    public SetOperations<String, Object> setOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForSet();
    }
    /**
     * 對(duì)有序集合類型的數(shù)據(jù)操作
     */
    @Bean
    public ZSetOperations<String, Object> zSetOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForZSet();
    }
}

package cn.huskysir.Utils;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import javax.annotation.Resource;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
@Component
public class RedisUtil {
    @Resource
    private RedisTemplate<String, Object> redisTemplate;
    public RedisUtil(RedisTemplate<String, Object> redisTemplate) {
        this.redisTemplate = redisTemplate;
    }
    /**
     * 指定緩存失效時(shí)間
     *
     * @param key  鍵
     * @param time 時(shí)間(秒)
     * @return
     */
    public boolean expire(String key, long time) {
        try {
            if (time > 0) {
                redisTemplate.expire(key, time, TimeUnit.SECONDS);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 根據(jù)key 獲取過期時(shí)間
     *
     * @param key 鍵 不能為null
     * @return 時(shí)間(秒) 返回0代表為永久有效
     */
    public long getExpire(String key) {
        return redisTemplate.getExpire(key, TimeUnit.SECONDS);
    }
    /**
     * 判斷key是否存在
     *
     * @param key 鍵
     * @return true 存在 false不存在
     */
    public boolean hasKey(String key) {
        try {
            return redisTemplate.hasKey(key);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 刪除緩存
     *
     * @param key 可以傳一個(gè)值 或多個(gè)
     */
    @SuppressWarnings("unchecked")
    public void del(String... key) {
        if (key != null && key.length > 0) {
            if (key.length == 1) {
                redisTemplate.delete(key[0]);
            } else {
                redisTemplate.delete((Collection<String>) CollectionUtils.arrayToList(key));
            }
        }
    }
    //============================String=============================
    /**
     * 普通緩存獲取
     *
     * @param key 鍵
     * @return 值
     */
    public Object get(String key) {
        return key == null ? null : redisTemplate.opsForValue().get(key);
    }
    /**
     * 普通緩存放入
     *
     * @param key   鍵
     * @param value 值
     * @return true成功 false失敗
     */
    public boolean set(String key, Object value) {
        try {
            redisTemplate.opsForValue().set(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 普通緩存放入并設(shè)置時(shí)間
     *
     * @param key   鍵
     * @param value 值
     * @param time  時(shí)間(秒) time要大于0 如果time小于等于0 將設(shè)置無限期
     * @return true成功 false 失敗
     */
    public boolean set(String key, Object value, long time) {
        try {
            if (time > 0) {
                redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
            } else {
                set(key, value);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 遞增
     *
     * @param key   鍵
     * @param delta 要增加幾(大于0)
     * @return
     */
    public long incr(String key, long delta) {
        if (delta < 0) {
            throw new RuntimeException("遞增因子必須大于0");
        }
        return redisTemplate.opsForValue().increment(key, delta);
    }
    /**
     * 遞減
     *
     * @param key   鍵
     * @param delta 要減少幾(小于0)
     * @return
     */
    public long decr(String key, long delta) {
        if (delta < 0) {
            throw new RuntimeException("遞減因子必須大于0");
        }
        return redisTemplate.opsForValue().increment(key, -delta);
    }
    //================================Map=================================
    /**
     * HashGet
     *
     * @param key  鍵 不能為null
     * @param item 項(xiàng) 不能為null
     * @return 值
     */
    public Object hget(String key, String item) {
        return redisTemplate.opsForHash().get(key, item);
    }
    /**
     * 獲取hashKey對(duì)應(yīng)的所有鍵值
     *
     * @param key 鍵
     * @return 對(duì)應(yīng)的多個(gè)鍵值
     */
    public Map<Object, Object> hmget(String key) {
        return redisTemplate.opsForHash().entries(key);
    }
    /**
     * HashSet
     *
     * @param key 鍵
     * @param map 對(duì)應(yīng)多個(gè)鍵值
     * @return true 成功 false 失敗
     */
    public boolean hmset(String key, Map<String, Object> map) {
        try {
            redisTemplate.opsForHash().putAll(key, map);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * HashSet 并設(shè)置時(shí)間
     *
     * @param key  鍵
     * @param map  對(duì)應(yīng)多個(gè)鍵值
     * @param time 時(shí)間(秒)
     * @return true成功 false失敗
     */
    public boolean hmset(String key, Map<String, Object> map, long time) {
        try {
            redisTemplate.opsForHash().putAll(key, map);
            if (time > 0) {
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 向一張hash表中放入數(shù)據(jù),如果不存在將創(chuàng)建
     *
     * @param key   鍵
     * @param item  項(xiàng)
     * @param value 值
     * @return true 成功 false失敗
     */
    public boolean hset(String key, String item, Object value) {
        try {
            redisTemplate.opsForHash().put(key, item, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 向一張hash表中放入數(shù)據(jù),如果不存在將創(chuàng)建
     *
     * @param key   鍵
     * @param item  項(xiàng)
     * @param value 值
     * @param time  時(shí)間(秒)  注意:如果已存在的hash表有時(shí)間,這里將會(huì)替換原有的時(shí)間
     * @return true 成功 false失敗
     */
    public boolean hset(String key, String item, Object value, long time) {
        try {
            redisTemplate.opsForHash().put(key, item, value);
            if (time > 0) {
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 刪除hash表中的值
     *
     * @param key  鍵 不能為null
     * @param item 項(xiàng) 可以使多個(gè) 不能為null
     */
    public void hdel(String key, Object... item) {
        redisTemplate.opsForHash().delete(key, item);
    }
    /**
     * 判斷hash表中是否有該項(xiàng)的值
     *
     * @param key  鍵 不能為null
     * @param item 項(xiàng) 不能為null
     * @return true 存在 false不存在
     */
    public boolean hHasKey(String key, String item) {
        return redisTemplate.opsForHash().hasKey(key, item);
    }
    /**
     * hash遞增 如果不存在,就會(huì)創(chuàng)建一個(gè) 并把新增后的值返回
     *
     * @param key  鍵
     * @param item 項(xiàng)
     * @param by   要增加幾(大于0)
     * @return
     */
    public double hincr(String key, String item, double by) {
        return redisTemplate.opsForHash().increment(key, item, by);
    }
    /**
     * hash遞減
     *
     * @param key  鍵
     * @param item 項(xiàng)
     * @param by   要減少記(小于0)
     * @return
     */
    public double hdecr(String key, String item, double by) {
        return redisTemplate.opsForHash().increment(key, item, -by);
    }
    //============================set=============================
    /**
     * 根據(jù)key獲取Set中的所有值
     *
     * @param key 鍵
     * @return
     */
    public Set<Object> sGet(String key) {
        try {
            return redisTemplate.opsForSet().members(key);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    /**
     * 根據(jù)value從一個(gè)set中查詢,是否存在
     *
     * @param key   鍵
     * @param value 值
     * @return true 存在 false不存在
     */
    public boolean sHasKey(String key, Object value) {
        try {
            return redisTemplate.opsForSet().isMember(key, value);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 將數(shù)據(jù)放入set緩存
     *
     * @param key    鍵
     * @param values 值 可以是多個(gè)
     * @return 成功個(gè)數(shù)
     */
    public long sSet(String key, Object... values) {
        try {
            return redisTemplate.opsForSet().add(key, values);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    /**
     * 將set數(shù)據(jù)放入緩存
     *
     * @param key    鍵
     * @param time   時(shí)間(秒)
     * @param values 值 可以是多個(gè)
     * @return 成功個(gè)數(shù)
     */
    public long sSetAndTime(String key, long time, Object... values) {
        try {
            Long count = redisTemplate.opsForSet().add(key, values);
            if (time > 0) {
                expire(key, time);
            }
            return count;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    /**
     * 獲取set緩存的長(zhǎng)度
     *
     * @param key 鍵
     * @return
     */
    public long sGetSetSize(String key) {
        try {
            return redisTemplate.opsForSet().size(key);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    /**
     * 移除值為value的
     *
     * @param key    鍵
     * @param values 值 可以是多個(gè)
     * @return 移除的個(gè)數(shù)
     */
    public long setRemove(String key, Object... values) {
        try {
            Long count = redisTemplate.opsForSet().remove(key, values);
            return count;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    //===============================list=================================
    /**
     * 獲取list緩存的內(nèi)容
     *
     * @param key   鍵
     * @param start 開始
     * @param end   結(jié)束  0 到 -1代表所有值
     * @return
     */
    public List<Object> lGet(String key, long start, long end) {
        try {
            return redisTemplate.opsForList().range(key, start, end);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    /**
     * 獲取list緩存的長(zhǎng)度
     *
     * @param key 鍵
     * @return
     */
    public long lGetListSize(String key) {
        try {
            return redisTemplate.opsForList().size(key);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    /**
     * 通過索引 獲取list中的值
     *
     * @param key   鍵
     * @param index 索引  index>=0時(shí)， 0 表頭，1 第二個(gè)元素，依次類推；index<0時(shí)，-1，表尾，-2倒數(shù)第二個(gè)元素，依次類推
     * @return
     */
    public Object lGetIndex(String key, long index) {
        try {
            return redisTemplate.opsForList().index(key, index);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    /**
     * 將list放入緩存
     *
     * @param key   鍵
     * @param value 值
     * @return
     */
    public boolean lSet(String key, Object value) {
        try {
            redisTemplate.opsForList().rightPush(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 將list放入緩存
     *
     * @param key   鍵
     * @param value 值
     * @param time  時(shí)間(秒)
     * @return
     */
    public boolean lSet(String key, Object value, long time) {
        try {
            redisTemplate.opsForList().rightPush(key, value);
            if (time > 0) {
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 將list放入緩存
     *
     * @param key   鍵
     * @param value 值
     * @return
     */
    public boolean lSet(String key, List<Object> value) {
        try {
            redisTemplate.opsForList().rightPushAll(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 將list放入緩存
     *
     * @param key   鍵
     * @param value 值
     * @param time  時(shí)間(秒)
     * @return
     */
    public boolean lSet(String key, List<Object> value, long time) {
        try {
            redisTemplate.opsForList().rightPushAll(key, value);
            if (time > 0) {
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 根據(jù)索引修改list中的某條數(shù)據(jù)
     *
     * @param key   鍵
     * @param index 索引
     * @param value 值
     * @return
     */
    public boolean lUpdateIndex(String key, long index, Object value) {
        try {
            redisTemplate.opsForList().set(key, index, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    /**
     * 移除N個(gè)值為value
     *
     * @param key   鍵
     * @param count 移除多少個(gè)
     * @param value 值
     * @return 移除的個(gè)數(shù)
     */
    public long lRemove(String key, long count, Object value) {
        try {
            Long remove = redisTemplate.opsForList().remove(key, count, value);
            return remove;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
}

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <!-- 排除自帶的logback依賴 -->
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<!-- log4j2 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="fatal">
    <Properties>
        <Property name="baseDir" value="/home/leilee/Projects/back/logs"/>
    </Properties>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <!--控制臺(tái)只輸出level及以上級(jí)別的信息（onMatch），其他的直接拒絕（onMismatch） -->
            <ThresholdFilter level="info" onMatch="ACCEPT"
                             onMismatch="DENY"/>
            <PatternLayout
                    pattern="[%d{MM:dd HH:mm:ss.SSS}] [%level] [%logger{36}] - %msg%n"/>
        </Console>
        <!--debug級(jí)別日志文件輸出-->
        <RollingFile name="debug_appender" fileName="${baseDir}/debug.log"
                     filePattern="${baseDir}/debug_%i.log.%d{yyyy-MM-dd}">
            <!-- 過濾器 -->
            <Filters>
                <!-- 限制日志級(jí)別在debug及以上在info以下 -->
                <ThresholdFilter level="debug"/>
                <ThresholdFilter level="info" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <!-- 日志格式 -->
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <!-- 策略 -->
            <Policies>
                <!-- 每隔一天轉(zhuǎn)存 -->
                <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
                <!-- 文件大小 -->
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>
        <!-- info級(jí)別日志文件輸出 -->
        <RollingFile name="info_appender" fileName="${baseDir}/info.log"
                     filePattern="${baseDir}/info_%i.log.%d{yyyy-MM-dd}">
            <!-- 過濾器 -->
            <Filters>
                <!-- 限制日志級(jí)別在info及以上在error以下 -->
                <ThresholdFilter level="info"/>
                <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <!-- 日志格式 -->
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <!-- 策略 -->
            <Policies>
                <!-- 每隔一天轉(zhuǎn)存 -->
                <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
                <!-- 文件大小 -->
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>
        <!-- error級(jí)別日志文件輸出 -->
        <RollingFile name="error_appender" fileName="${baseDir}/error.log"
                     filePattern="${baseDir}/error_%i.log.%d{yyyy-MM-dd}">
            <!-- 過濾器 -->
            <Filters>
                <!-- 限制日志級(jí)別在error及以上 -->
                <ThresholdFilter level="error"/>
            </Filters>
            <!-- 日志格式 -->
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <Policies>
                <!-- 每隔一天轉(zhuǎn)存 -->
                <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
                <!-- 文件大小 -->
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>
    </Appenders>
    <Loggers>
        <Root level="debug">
            <AppenderRef ref="Console"/>
            <AppenderRef ref="debug_appender"/>
            <AppenderRef ref="info_appender"/>
            <AppenderRef ref="error_appender"/>
        </Root>
    </Loggers>
</Configuration>

package cn.huskysir.Service.Impl;
import cn.huskysir.Dao.DynastyMapper;
import cn.huskysir.Dao.EmperorMapper;
import cn.huskysir.Entity.MySQL.Dynasty;
import cn.huskysir.Entity.MySQL.Emperor;
import cn.huskysir.Service.EmperorService;
import cn.huskysir.Utils.RedisUtil;
import cn.huskysir.Vo.EmperorVo;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import lombok.extern.log4j.Log4j2;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
/**
 * Emperor Service層（實(shí)現(xiàn)類）
 */
@Log4j2
@Service
public class EmperorServiceImpl implements EmperorService {
    @Resource
    EmperorMapper emperorMapper;
    @Resource
    DynastyMapper dynastyMapper;
    @Resource
    RedisUtil redisUtil;
    /**
     * 獲得所有EmperorVo對(duì)象列表
     *
     * @return
     */
    @Override
    public List<EmperorVo> getAllEmperorVoList() {
        // 判斷Redis是否存在該結(jié)果
        String key = "getAllEmperorVoList";
        if (redisUtil.hasKey(key)) {
            List<EmperorVo> emperorVoList = (List<EmperorVo>) redisUtil.get(key);
            System.out.println("由Redis得到" + key + "結(jié)果");
            // 日志記錄
            log.info(new Date() + " 由Redis得到" + key + "數(shù)據(jù)");
            return emperorVoList;
        }
        List<Emperor> emperorList = emperorMapper.selectList(null);
        List<EmperorVo> emperorVoList = new LinkedList<>();
        for (Emperor emperor : emperorList) {
            EmperorVo emperorVo = new EmperorVo();
            BeanUtils.copyProperties(emperor, emperorVo);
            Dynasty dynasty = dynastyMapper.selectById(emperor.getDynastyId());
            emperorVo.setDynastyName(dynasty.getName());
            emperorVo.calculateTime();
            emperorVoList.add(emperorVo);
        }
        System.out.println("由MySQL得到" + key + "結(jié)果");
        // 日志記錄
        log.info(new Date() + " 由MySQL得到" + key + "數(shù)據(jù)");
        if (redisUtil.set(key, emperorVoList, 600)) {
            System.out.println("Redis已存入" + key + "數(shù)據(jù)");
            // 日志記錄
            log.info(new Date() + " Redis已存入" + key + "數(shù)據(jù)");
        }
        return emperorVoList;
    }
    /**
     * 根據(jù)id獲得EmperorVo對(duì)象
     *
     * @param id
     * @return
     */
    @Override
    public EmperorVo getEmperorVoById(Integer id) {
        // 判斷Redis是否存在該結(jié)果
        String key = "getEmperorVoById_" + String.valueOf(id);
        if (redisUtil.hasKey(key)) {
            EmperorVo emperorVo = (EmperorVo) redisUtil.get(key);
            System.out.println("由Redis得到" + key + "結(jié)果");
            // 日志記錄
            log.info(new Date() + " 由Redis得到" + key + "數(shù)據(jù)");
            return emperorVo;
        }
        Emperor emperor = emperorMapper.selectById(id);
        EmperorVo emperorVo = new EmperorVo();
        BeanUtils.copyProperties(emperor, emperorVo);
        Dynasty dynasty = dynastyMapper.selectById(emperor.getDynastyId());
        emperorVo.setDynastyName(dynasty.getName());
        emperorVo.calculateTime();
        System.out.println("由MySQL得到" + key + "結(jié)果");
        // 日志記錄
        log.info(new Date() + " 由MySQL得到" + key + "數(shù)據(jù)");
        if (redisUtil.set(key, emperorVo, 600)) {
            System.out.println("Redis已存入" + key + "數(shù)據(jù)");
            // 日志記錄
            log.info(new Date() + " Redis已存入" + key + "數(shù)據(jù)");
        }
        return emperorVo;
    }
    /**
     * 根據(jù)dynastyId獲得所有EmperorVo對(duì)象列表
     *
     * @param dynastyId
     * @return
     */
    @Override
    public List<EmperorVo> getEmperorListByDynastyId(Integer dynastyId) {
        // 判斷Redis是否存在該結(jié)果
        String key = "getEmperorListByDynastyId_" + String.valueOf(dynastyId);
        if (redisUtil.hasKey(key)) {
            List<EmperorVo> emperorVoList = (List<EmperorVo>) redisUtil.get(key);
            System.out.println("由Redis得到" + key + "結(jié)果");
            // 日志記錄
            log.info(new Date() + " 由Redis得到" + key + "數(shù)據(jù)");
            return emperorVoList;
        }
        QueryWrapper<Emperor> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("dynasty_id", dynastyId);
        List<Emperor> emperorList = emperorMapper.selectList(queryWrapper);
        List<EmperorVo> emperorVoList = new LinkedList<>();
        String nastyName = dynastyMapper.selectById(dynastyId).getName();
        for (Emperor emperor : emperorList) {
            EmperorVo emperorVo = new EmperorVo();
            BeanUtils.copyProperties(emperor, emperorVo);
            emperorVo.setDynastyName(nastyName);
            emperorVo.calculateTime();
            emperorVoList.add(emperorVo);
        }
        System.out.println("由MySQL得到" + key + "結(jié)果");
        // 日志記錄
        log.info(new Date() + " 由MySQL得到" + key + "數(shù)據(jù)");
        if (redisUtil.set(key, emperorVoList, 600)) {
            System.out.println("Redis已存入" + key + "數(shù)據(jù)");
            // 日志記錄
            log.info(new Date() + " Redis已存入" + key + "數(shù)據(jù)");
        }
        return emperorVoList;
    }
}