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List自定义排序(可多条件)
1:先建需要排序的属性Model
1 package com.msqsoft.app.queuing.util; 2 3 public class ListOrderByModel { 4 5 private String queueNumber; 6 7 private Integer status; 8 9 public String getQueueNumber() { 10 return queueNumber; 11 } 12 13 public void setQueueNumber(String queueNumber) { 14 this.queueNumber = queueNumber; 15 } 16 17 public Integer getStatus() { 18 return status; 19 } 20 21 public void setStatus(Integer status) { 22 this.status = status; 23 } 24 25 public ListOrderByModel(String queueNumber, Integer status){ 26 this.queueNumber = queueNumber; 27 this.status = status; 28 } 29 }
2:建立排序 Util 定义排序方式 需实现 Comparator
1 package com.msqsoft.app.queuing.util; 2 3 import java.util.Comparator; 4 5 public class ListOrderByComparatorModelUtil implements Comparator { 6 7 @Override 8 public int compare(Object obj1, Object obj2) { 9 10 ListOrderByModel orderByModel1 = (ListOrderByModel)obj1; 11 ListOrderByModel orderByModel2 = (ListOrderByModel)obj2; 12 13 // 先排序status 14 if (orderByModel1.getStatus() > orderByModel2.getStatus()) { 15 return -1; 16 } else if (orderByModel1.getStatus() < orderByModel2.getStatus()) { 17 return 1; 18 } else { 19 // 排序号码 20 return orderByModel1.getQueueNumber().compareTo(orderByModel2.getQueueNumber()); 21 } 22 } 23 24 }
3 : 测试
1 package web; 2 3 import java.text.Collator; 4 import java.text.ParseException; 5 import java.text.SimpleDateFormat; 6 import java.util.ArrayList; 7 import java.util.Collections; 8 import java.util.Comparator; 9 import java.util.Date; 10 import java.util.List; 11 12 import com.msqsoft.app.queuing.util.ListOrderByComparatorModelUtil; 13 import com.msqsoft.app.queuing.util.ListOrderByModel; 14 15 public class Test1 { 16 @SuppressWarnings("unchecked") 17 public static void main(String[] args) throws ParseException { 18 19 List list = new ArrayList(); 20 list.add(new ListOrderByModel("A002", 0)); 21 list.add(new ListOrderByModel("A001", 0)); 22 list.add(new ListOrderByModel("A003", 0)); 23 list.add(new ListOrderByModel("A006", 6)); 24 list.add(new ListOrderByModel("A004", 0)); 25 list.add(new ListOrderByModel("A008", 5)); 26 list.add(new ListOrderByModel("A005", 0)); 27 list.add(new ListOrderByModel("A007", 6)); 28 29 ListOrderByComparatorModelUtil comparator = new ListOrderByComparatorModelUtil(); 30 Collections.sort(list, comparator); 31 for (int i = 0; i < list.size(); i++) { 32 ListOrderByModel listMode = (ListOrderByModel) list.get(i); 33 System.out.println(listMode.getStatus() + "," + listMode.getQueueNumber()); 34 } 35 } 36 }
List自定义排序(可多条件)
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