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完成支付的下单和提交订单的逻辑
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@ -29,4 +29,13 @@ public class ObjectUtils {
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return obj1.compareTo(obj2) > 0 ? obj1 : obj2;
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}
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public static <T> T defaultIfNull(T... array) {
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for (T item : array) {
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if (item != null) {
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return item;
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}
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}
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return null;
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}
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}
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