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CollectionUtils

apache包下的CollectionUtils

org.apache.commons.collections包下的CollectionUtils工具类。 <!--CollectionUtils --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-co ......
CollectionUtils apache

org.apache.commons.collections4.CollectionUtils

{// 集合判空 List<Integer> list = new ArrayList<>(); list.add(2); list.add(1); list.add(3); if (CollectionUtils.isEmpty(list)) { System.out.println("集合为空" ......
CollectionUtils collections4 collections commons apache
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