refactor resource utils a little bit

[nobodyiam]

No description provided.

[coveralls]

Coverage increased (+0.06%) to 50.506% when pulling dca803c on nobodyiam:refactor-resource-utils into a86dd3e on ctripcorp:master.

[codecov-io]

Codecov Report

Merging #804 into master will increase coverage by 0.03%.
The diff coverage is 50%.

@@             Coverage Diff              @@
##             master     #804      +/-   ##
============================================
+ Coverage     46.95%   46.99%   +0.03%     
- Complexity     1542     1545       +3     
============================================
  Files           352      352              
  Lines          9681     9686       +5     
  Branches        960      961       +1     
============================================
+ Hits           4546     4552       +6     
+ Misses         4797     4794       -3     
- Partials        338      340       +2

Impacted Files	Coverage Δ	Complexity Δ
...rip/framework/apollo/core/utils/ResourceUtils.java	43.47% <50%> (-2.87%)	6 <0> (+1)
...work/apollo/biz/message/DatabaseMessageSender.java	66.66% <0%> (+10.41%)	8% <0%> (+2%)	⬆️

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