java list集合排序按某一属性排序操作

  public List<FreightM> sortList(List<FreightM> list){

    Collections.sort(list, new Comparator<FreightM>(){
      @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<Integer, String> 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());
}
});