【findBugs】findBugs對Integer.valueOf()的報錯一類沒必要要的裝箱轉換

findBugs工具警告的，一類沒必要要的裝箱轉換： 「Boxing/unboxing to parse a primitive」, A boxed primitive is created from a String, just to extract the unboxed primitive value. It is more efficient to just call the static

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