kaiyuanke-2301210357: fix了一些warning & 对一些语句做了简化

[Mrhorse99]

Which Issue(s) This PR Fixes

Fixes #issue_id

Brief Description

How Did You Test This Change?

[RongtongJin]

@Mrhorse99 It would be better to submit a relevant issue first.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 42.90%. Comparing base (144b22b) to head (044ac92).

Files	Patch %	Lines
...ocketmq/broker/processor/AdminBrokerProcessor.java	0.00%	5 Missing and 4 partials ⚠️
...apache/rocketmq/broker/slave/SlaveSynchronize.java	0.00%	2 Missing ⚠️
...g/apache/rocketmq/srvutil/AclFileWatchService.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8237      +/-   ##
=============================================
- Coverage      42.92%   42.90%   -0.03%     
+ Complexity     10383    10371      -12     
=============================================
  Files           1271     1271              
  Lines          88785    88775      -10     
  Branches       11408    11404       -4     
=============================================
- Hits           38112    38087      -25     
- Misses         45973    45977       +4     
- Partials        4700     4711      +11     

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