When doing springboot 2.x + redis (using jedis) integration, when starting
JedisConnectionFactory factory = new JedisConnectionFactory();
抛出异常：Factory method 'jedisConnectionFactory' threw exception; nested exception is java.lang.NoClassDefFoundError: redis/clients/util/Pool
among them:
The version number of spring-boot-starter-data-redis is 2.1.9; the version number of the introduced spring-data-redis is 2.1.11
<!-- The default connection pool technology adopted by the version 1.5 is the default connection pool of versions above jedis 2.0 It is lettuce, jedis is used here, so lettuce jar needs to be excluded -->
The cause of the problem: It should be that spring-data-redis in the dependency package conflicts with the introduced jedis version
Before the change:
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>3.1.0</version>
</dependency>
改动后：
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.1</version>
</dependency>
启动OK！
Note: It seems that jedis version 3.0.0 and above are not available. So pay attention to the version! ! ! !
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Original link: https://blog.csdn.net/doubleqinyan/article/details/102688467