在springboot项目pom文件中添加了下面依赖

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

后面老师说spring-boot-starter-data-redis默认使用的lettuce操作redis，在访问量大时报堆外内存溢出，参照老师的方法，对依赖作了下改动：

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-data-redis</artifactId>
	<exclusions>
		<exclusion>
			<groupId>io.lettuce</groupId>
			<artifactId>lettuce-core</artifactId>
		</exclusion>
	</exclusions>
</dependency>

将spring-boot-starter-data-redis内部的lettuce依赖移除，并添加jedis客户端，

 <dependency>
	<groupId>redis-clients</groupId>
	<artifactId>jedis</artifactId>
	<version>3.1.0</version>
</dependency>

启动后项目报错：

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method redisTemplate in org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration required a bean of type 'org.springframework.data.redis.connection.RedisConnectionFactory' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)

The following candidates were found but could not be injected:
    - Bean method 'redisConnectionFactory' in 'JedisConnectionConfiguration' not loaded because @ConditionalOnClass did not find required class 'org.apache.commons.pool2.impl.GenericObjectPool'
    - Bean method 'redisConnectionFactory' in 'LettuceConnectionConfiguration' not loaded because @ConditionalOnClass did not find required class 'io.lettuce.core.RedisClient'

Action:

Consider revisiting the entries above or defining a bean of type 'org.springframework.data.redis.connection.RedisConnectionFactory' in your configuration.

Disconnected from the target VM, address: '127.0.0.1:54336', transport: 'socket'

Process finished with exit code 0

springboot版本为2.2.1.RELEASE，

后面在原基础上添加下面依赖启动才正常：

 <dependency>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-pool2</artifactId>
 </dependency>