[type: refactor] Optimize code.

[ousinka]

Fixes: #3881

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #3882 (e3b4f7a) into master (7e944fc) will decrease coverage by 0.17%.
The diff coverage is 20.00%.

@@             Coverage Diff              @@
##             master    #3882      +/-   ##
============================================
- Coverage     64.83%   64.66%   -0.18%     
+ Complexity     6132     6116      -16     
============================================
  Files           900      900              
  Lines         24904    24904              
  Branches       2244     2244              
============================================
- Hits          16146    16103      -43     
- Misses         7351     7401      +50     
+ Partials       1407     1400       -7     

Impacted Files	Coverage Δ
...ice/converter/AbstractSelectorHandleConverter.java	79.16% <0.00%> (ø)
...u/admin/service/manager/impl/SwaggerDocParser.java	0.50% <0.00%> (ø)
.../service/manager/impl/LoadServiceDocEntryImpl.java	23.00% <33.33%> (ø)
...n/alibaba/dubbo/cache/AlibabaDubboConfigCache.java	47.12% <0.00%> (-31.04%)	⬇️
.../apache/shenyu/admin/model/dto/BatchCommonDTO.java	50.00% <0.00%> (-7.15%)	⬇️
...apache/shenyu/admin/model/dto/AuthPathWarpDTO.java	57.14% <0.00%> (-7.15%)	⬇️
...org/apache/shenyu/admin/model/dto/AuthPathDTO.java	58.82% <0.00%> (-5.89%)	⬇️
...nyu/plugin/motan/cache/ApplicationConfigCache.java	52.00% <0.00%> (-5.00%)	⬇️
...che/shenyu/admin/model/vo/DashboardUserEditVO.java	60.86% <0.00%> (-4.35%)	⬇️
...ache/shenyu/admin/model/dto/DataPermissionDTO.java	59.25% <0.00%> (-3.71%)	⬇️
... and 21 more

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