[ref] 以ClassPathResource方式读取文件 relate to issue #37

[lengp]

[codecov-io]

Codecov Report

Merging #38 (b1e979b) into master (08059d9) will decrease coverage by 0.00%. The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master     #38      +/-   ##
=========================================
- Coverage    5.31%   5.31%   -0.01%     
=========================================
  Files         131     131              
  Lines        4007    4009       +2     
  Branches      300     300              
=========================================
  Hits          213     213              
- Misses       3794    3796       +2     

Impacted Files	Coverage Δ
...ore/src/main/java/com/ijpay/core/kit/WxPayKit.java	0.00% <0.00%> (ø)

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[Javen205]

已优化，感谢反馈以及贡献代码