摘要：
EasyExcel导入导出多sheet页 依赖 <dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>3.1.0</version> <scope>compile</scope> 阅读全文
摘要：
list.stream() .collect( Collectors.collectingAndThen( Collectors.toCollection( () -> new TreeSet<>(Comparator.comparing(e -> e.getId)) ), ArrayList::n 阅读全文