public class A{    public xxxx fun(){        //业务逻辑        //xxxxxxxxxxxxxxxxxxx        //排序        Collections.sort(myList, new MyComparator(configValueList));    }    /**    *内部类实现排序    *configValueList 排序规则    *根据DtoList中的某一个字段，按照configValueList配置的规则来排序    *如configValueList ["a","b","c"]    *myList    myList.get[0].getVal() = b，myList.get[1].getVal() = a，myList.get[2].getVal() = c    *那么排序后 myList.get[0].getVal() = a，myList.get[1].getVal() = b，myList.get[2].getVal() = c    */    class MyComparator implements Comparator
     
       {        private List
      
        configValueList;        public MyComparator(List
       
         configValueList) {            this.configValueList = configValueList;        }        @Override        public int compare(Dto dto1, Dto dto2) {            if(CollectionUtils.isEmpty(configValueList) || dto1 == null || dto2 == null){                return 0;            }            String val1 = dto1.getVal();            String val2 = dto2.getVal();            if(StringUtils.isBlank(val1) || StringUtils.isBlank(val2)){                return 0;            }            int sort1 = configValueList.indexOf(val1);            int sort2 = configValueList.indexOf(val2);            if(-1 == sort1 || -1 == sort2){                return 0;            }            return sort1 - sort2;        }    }}