标签:studentsList iterator 多个 Students 元素 List stu add new
Students students = new Students("李四1","20","男","123456789978654","1010","四川省"); Students students3 = new Students("张三1","21","女","258741369741","1010","重庆市"); Students students1 = new Students("李四2","20","男","123456789978654","1010","四川省"); Students students2 = new Students("张三2","21","女","258741369741","1010","重庆市"); Students students4 = new Students("王麻子","35","女","369856311785","2020","甘肃省"); List<Students> studentsList = new ArrayList<>(); studentsList.add(students); studentsList.add(students1); studentsList.add(students2); studentsList.add(students3); studentsList.add(students4); System.out.println(JSON.toJSONString(studentsList)); /** * 方法一,根据idNo和idType去重 */ String idN=""; String idT=""; Iterator iterator = studentsList.listIterator(); while (iterator.hasNext()){ Students stu = (Students) iterator.next(); if(idN.equals(stu.getIdNo()) && idT.equals(stu.getIdType())){ iterator.remove(); }else{ idN=stu.getIdNo(); idT=stu.getIdType(); } } System.out.println(JSON.toJSONString(studentsList)); /** * 方法二 * 根据stram方法去重 * 根据idNo和idType去重 */ List<Students> studentsList1 = studentsList.stream().collect(Collectors.collectingAndThen( Collectors.toCollection(()->new TreeSet<>(Comparator.comparing(o->o.getIdNo()+";"+o.getIdType()))),ArrayList::new)); System.out.println(JSON.toJSONString(studentsList1));
标签:studentsList,iterator,多个,Students,元素,List,stu,add,new 来源: https://blog.csdn.net/qq_41458352/article/details/120103919
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