redis在windows端使用 下載壓縮包後解壓雙擊redis-server.exe或在目錄下開啟命令列視窗輸入redis-server.exe redis.windows.conf執行redis redis客戶端分為自帶的命令框和視覺化工具 自帶的命令框雙擊reids-cli.exe（沒有設定密碼的情況下）或在目錄下開啟命令列視窗輸入redis-cli.exe -h localhost -p 6379執行redis客戶端 視覺化工具使用redisDesktopManager 一些redis簡單的命令 檢視密碼 config get requirepass 設定密碼config set requirepass “root” 這種方式設定後重啟redis密碼失效，永久的方式是去redis.window.conf檔案中去找到requirepass修改，設定密碼後啟動客戶端要加上-a root 設值 set key value 取值get key 檢視所有鍵keys * 檢視鍵數量dbsize 切換資料庫select index 清空當前資料庫flushdb 清空所有資料庫fulushall

service層做快取 pom檔案中引入

<dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>2.9.0</version>
    </dependency>

    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-redis</artifactId>
      <version>1.8.6.RELEASE</version>
    </dependency>
 

applicationContext.xml配置

<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
              <property name="maxTotal" value="${redis.pool.maxTotal}"/>
              <property name="maxIdle" value="${redis.pool.maxIdle}"/>
              <property name="minIdle" value="${redis.pool.minIdle}"/>
              <property name="maxWaitMillis" value="${redis.pool.maxWaitMillis}"/>
              <property name="testOnBorrow" value="${redis.pool.testOnBorrow}"/>
              <property name="testOnReturn" value="${redis.pool.testOnReturn}"/>
              <property name="testWhileIdle" value="${redis.pool.testWhileIdle}"/>
              <property name="timeBetweenEvictionRunsMillis" value="${redis.pool.timeBetweenEvictionRunsMillis}"/>
       </bean>

       <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
              <property name="hostName" value="${redis.host}"/>
              <property name="port" value="${redis.port}"/>
              <property name="password" value="${redis.password}"/>
              <property name="timeout" value="${redis.timeout}"/>
              <property name="poolConfig" ref="jedisPoolConfig"/>
              <!--使用連線池預設true-->
              <property name="usePool" value="true" />
       </bean>

       <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
              <property name="keySerializer">
                     <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
              </property>
              <property name="valueSerializer">
                     <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
              </property>
              <property name="hashKeySerializer">
                     <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
              </property>
              <property name="hashValueSerializer">
                     <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
              </property>
              <property name="connectionFactory" ref="jedisConnectionFactory"/>
       </bean>

       <bean id="cacheManager" class="org.springframework.data.redis.cache.RedisCacheManager">
              <constructor-arg index="0" ref="redisTemplate"/>
              <property name="defaultExpiration" value="${redis.cacheExpire}" />
       </bean>

       <!-- 啟用快取註解功能-->
       <cache:annotation-driven cache-manager="cacheManager" />
 

service層

 //清空user下快取
    //@CacheEvict(value = "user", allEntries = true)
    @Override
    public int insert(User user) {
        return userMapper.insert(user);
    }

    //@Cacheable(value = "user", key = "'selectByName('+#name+')'")
    @Override
    public User selectByName(String name) {
        return userMapper.selectByName(name);
    }

    //@Cacheable(value = "user", key = "'selectAll'")
    @Override
    public List<User> selectAll() {
        return userMapper.selectAll();
    }

理解幾個註釋@CachePut不去檢查快取中是否存在，直接去資料庫中取並放入快取中 <cache:annotation-driven cache-manager=“cacheManager” /> mode屬性可選值由proxy和aspectj，預設是proxy，當mode為proxy時，只有快取方法在外部呼叫時Spring Cache 才會發生作用，並且只有Public方法上標註@Cacheable等標註才會起作用，當mode為aspectj時不存在上面兩個問題 proxy-target-class屬性表示是否代理class，預設是false，@Cacheable等可以標註在介面方法上，這對於基於 介面代理沒有問題，當proxy-target-class為true或mode為aspectj時是基於class進行操作的，定義在介面上的註解不會識別的 參考https://www.cnblogs.com/fashflying/p/6908028.html

MyBatis二級快取 applicationContext.xml檔案中新增

<bean class="org.example.redis.MybatisRedisCacheTransfer">
           <property name="jedisConnectionFactory" ref="jedisConnectionFactory"/>
       </bean>

建立MybatisRedisCacheTransfer類和MybatisRedisCache 這些key儲存在redis的list結構，以id作為list的key，每個mapper介面產生的id不變 參考https://www.jianshu.com/p/1d0be9bf3f80 Mapper.xml中新增

 <cache type="org.example.redis.MybatisRedisCache"/>
 
<!--#{name}自動加引號，預處理防止SQL注入 ${column}不加引號用於order by-->
  <select id="selectByName" resultType="User" useCache="true">
    select id, user_name, user_password, user_email, create_time
    from user
    where user_name=#{name}
  </select>
  
 <insert id="insert" flushCache="true">
    insert into user(user_name, user_password, user_email)
    value(#{userName}, #{userPassword}, #{userEmail})
  </insert>
  
  <select id="selectAll" resultMap="BaseResultMap" useCache="true">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select id, user_name, user_password, user_email, create_time
    from user
  </select>

Mybatis二級快取useCache=true這個查詢sql的結果進行快取，其餘insert update delete可以flushCache=true會把 redis中該mapper下的二級快取清除 參照https://www.jianshu.com/p/52b0805f1950