Stream流排序数组和List 详解
作者：李长渊哦
这篇文章主要介绍了Stream流排序数组和List 详解，文章围绕主题展开详细的内容介绍，具有一定的参考价值，感兴趣的小伙伴可以参考一下
一、对象单字段排序
List<People> peopleList = Lists.newArrayList();
peopleList.add(new People(1, "小王", 5));
peopleList.add(new People(1, "小李", 4));
peopleList.add(new People(2, "小张", 3));
peopleList.add(new People(2, "小皇", 2));
peopleList.add(new People(2, "小刘", 1));
//单字段排序
peopleList = peopleList.stream().sorted(Comparator.comparing(People::getJgId)).collect(Collectors.toList());
log.info(peopleList.toString());
//这里是根据userId 进行排序——降序排序 reversed()
peopleList = peopleList.stream().sorted(Comparator.comparing(People::getJgId).reversed()).collect(Collectors.toList());
log.info(peopleList.toString());
二、多字段排序
List<People> peopleList = Lists.newArrayList();
peopleList.add(new People(1, "小王", 5));
peopleList.add(new People(1, "小李", 4));
peopleList.add(new People(2, "小张", 3));
peopleList.add(new People(2, "小皇", 2));
peopleList.add(new People(2, "小刘", 1));
//这里是根据Id及jgId进行联合升序排序
peopleList = peopleList.stream().sorted(Comparator.comparing(People::getId).thenComparing(People::getJgId)).collect(Collectors.toList());
log.info(peopleList.toString());
//下面两个结果都是以Id降序jgId升序排序的结果，但是查询方式不同
//先以id升序,升序结果进行id降序,再进行jgId升序
peopleList = peopleList.stream().sorted(Comparator.comparing(People::getId).reversed().thenComparing(People::getJgId)).collect(Collectors.toList());
log.info(peopleList.toString());
//先以id降序,再进行jgId升序 **推荐使用该种方式**
peopleList = peopleList.stream().sorted(Comparator.comparing(People::getId,Comparator.reverseOrder()).thenComparing(People::getJgId)).collect(Collectors.toList());
log.info(peopleList.toString());
//先以id升序,再进行jgId降序
peopleList = peopleList.stream().sorted(Comparator.comparing(People::getId).thenComparing(People::getJgId,Comparator.reverseOrder())).collect(Collectors.toList());
log.info(peopleList.toString());
三、数组排序以及List<Integer>排序
先把数组转换成List对象再进行排序
到此这篇关于Stream流排序数组和List 详解的文章就介绍到这了,更多相关Stream List 内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！