refactor:Simplify the code

[zhangyangx]

Signed-off-by: yang.zhang yang.zhang-iog@daocloud.io

What's the purpose of this PR

Simplify the code

Which issue(s) this PR fixes:

Fixes #

[codecov-commenter]

Codecov Report

Merging #4435 (460ce01) into master (471f59d) will increase coverage by 0.01%.
The diff coverage is 57.14%.

@@             Coverage Diff              @@
##             master    #4435      +/-   ##
============================================
+ Coverage     53.39%   53.41%   +0.01%     
  Complexity     2688     2688              
============================================
  Files           490      490              
  Lines         15253    15252       -1     
  Branches       1586     1586              
============================================
+ Hits           8145     8147       +2     
+ Misses         6551     6549       -2     
+ Partials        557      556       -1     

Impacted Files	Coverage Δ
.../foundation/internals/NetworkInterfaceManager.java	60.00% <40.00%> (-2.72%)	⬇️
.../ctrip/framework/apollo/core/MetaDomainConsts.java	80.72% <100.00%> (-0.23%)	⬇️
...amework/foundation/internals/ServiceBootstrap.java	94.11% <100.00%> (-0.33%)	⬇️
...mework/apollo/portal/component/PortalSettings.java	65.62% <0.00%> (+7.81%)	⬆️

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[nobodyiam]

LGTM