清除redis缓存，解决异常

异常信息：

org.springframework.data.redis.serializer.SerializationException: Cannot deserialize; nested exception is org.springframework.core.serializer.support.SerializationFailedException: Failed to deserialize payload. Is the byte array a result of corresponding serialization for DefaultDeserializer?; nested exception is java.io.InvalidClassException: com.luban.scm.scmplatform.modules.sys.entity.LoginUser; local class incompatible: stream classdesc serialVersionUID = -5388239816073203128, local class serialVersionUID = 4198333968177734505
	org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:84)

清除缓存：

1.访问redis根目录    cd  /usr/local/redis-2.8.19

2.登录redis：redis-cli -h 127.0.0.1 -p 6379

3.查看所有key值：keys *

4.删除指定索引的值：del key

5.清空整个 Redis 服务器的数据：flushall 

6.清空当前库中的所有 key：flushdb