public class TaskAutoExecutePlan{    private String id = null;    private AutoExecutePlanType autoExecutePlanType;    private TaskStatus taskStatus;    private String parameters;    private Date createDate;    private Date completeDate;    private Date modifyDate;    /**get set 方法*/}public enum  AutoExecutePlanType {    ImportSiteCellParameter(2),    WIFI(32);    /*构造函数等*/}

 1 public static void main(String[] args) { 2     SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSSSS"); 3     Date now = new Date(); 4     List<TaskAutoExecutePlan> items = new ArrayList<>(); 5  6     try { 7         Thread.sleep(10000); 8     } catch (InterruptedException e) { 9         e.printStackTrace();10     }11 12     TaskAutoExecutePlan plan = new TaskAutoExecutePlan();13     plan.setId(UUID.randomUUID().toString());14     plan.setCreateDate(new Date());15     plan.setAutoExecutePlanType(AutoExecutePlanType.ImportSiteCellParameter);16     items.add(plan);17 18 19     plan = new TaskAutoExecutePlan();20     plan.setId(UUID.randomUUID().toString());21     plan.setCreateDate(now);22     plan.setAutoExecutePlanType(AutoExecutePlanType.ImportSiteCellParameter);23     items.add(plan);24 25     plan = new TaskAutoExecutePlan();26     plan.setId(UUID.randomUUID().toString());27     plan.setCreateDate(now);28     plan.setAutoExecutePlanType(AutoExecutePlanType.WIFI);29     items.add(plan);30 31     plan = new TaskAutoExecutePlan();32     plan.setId(UUID.randomUUID().toString());33     plan.setCreateDate(new Date());34     plan.setAutoExecutePlanType(AutoExecutePlanType.WIFI);35     items.add(plan);36 37     System.out.println("before sort:");38     for (TaskAutoExecutePlan item : items) {39         System.out.println(item.getId() + ":" + item.getAutoExecutePlanType() + ":" + format.format(item.getCreateDate()));40     }41 42     Collections.sort(items, new Comparator<TaskAutoExecutePlan>() {43         @Override44         public int compare(TaskAutoExecutePlan o1, TaskAutoExecutePlan o2) {45             int i = o1.getAutoExecutePlanType().getValue() - o2.getAutoExecutePlanType().getValue();46             if (i == 0) {47                 if (o1.getCreateDate().equals(o2.getCreateDate())) {48                     return 0;49                 } else if (o1.getCreateDate().after(o2.getCreateDate())) {50                     return 1;51                 } else {52                     return -1;53                 }54             }55             return i;56         }57     });58 59     System.out.println("after sort:");60     for (TaskAutoExecutePlan item : items) {61         System.out.println(item.getId() + ":" + item.getAutoExecutePlanType() + ":" + format.format(item.getCreateDate()));62     }63 }