improve for coding style

[JacksonTian]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.89%. Comparing base (bdb4fbc) to head (7fb80e5).

Files	Patch %	Lines
...e/src/main/java/com/aliyuncs/DefaultAcsClient.java	90.90%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #910      +/-   ##
============================================
- Coverage     89.98%   89.89%   -0.10%     
+ Complexity     1654     1640      -14     
============================================
  Files           124      123       -1     
  Lines          4734     4689      -45     
  Branches        544      536       -8     
============================================
- Hits           4260     4215      -45     
  Misses          347      347              
  Partials        127      127              

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