java list集合排序按某一属性排序操作

 public List sortList(List list){ Collections.sort(list, new Comparator(){ @Override public int compare(FreightM o1, FreightM o2) { if(o1.getType()==0){ return -1; }else{ return 1; } } }); return list; }

 //按照List中对象的id属性升序 list.sort(Comparator.comparing(Stu::getId)) //按照List中对象的id属性降序 list.sort(Comparator.comparing(Stu::getId).reversed()); //多条件升序 list.sort(Comparator.comparing(Stu::getId).thenComparing(Stu::getSid)); //id升序,sid降序 list.sort(Comparator.comparing(Stu::getId).reversed().thenComparing(Stu::getSid)); //key值重复的map MultiValueMap timeMap = new LinkedMultiValueMap<>(); //集合升序排序 Collections.sort(student, new Comparator(){ public int compare(StudentVo p1, StudentVo p2) { return Integer.parseInt(p1.getStudentCode()) - Integer.parseInt(p2.getStudentCode()); } });