hao_hl1314的博客

使用map加reduce操作符实现List<String> list=Arrays.asList(new String[]{"1.0","3","2","5.2","4"});Double total=list.stream().map(BigDecimal::new).reduce((sum,item)->sum.add(item)).map(BigDeci

对象去重 ，可自定义实现去重方法，增加特有操作（如：指点字段拼接到一起）public class Test { public static class Data extends LambdaUtils<Data>{ private String key; private String value; ...