title: how to make spring-boot-starter-data-redis delete return result
body: <h1>Hi everyone,</h1>
  
  <p>I use spring-boot-starter-data-redis library .</p>
  
  <p>And I am using the RedisTemplate to operate redis.I want to get the result of deleting the key.But I found that the funcation return void value.I read the code of how it works.And I find it return nothing.How can I get the delete result to know if it works right?
  Please help me.</p>
  
  <h1>Thanks! Have a good day.</h1>