package com.ljq.test;import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;public class UserSort {public static void main(String[] args) {List<User> userList =new ArrayList<User>();userList.add(new User(1,2.2));userList.add(new User(2,1.1));userList.add(new User(3,4.4));userList.add(new User(4,5.5));userList.add(new User(5,3.3));Collections.sort(userList, new Comparator<User>() {public int compare(User u1, User u2) {return new Double(u1.getSalary()).compareTo(new Double(u2.getSalary())); //升序// return new Double(u2.getSalary()).compareTo(new Double(u2.getSalary())); //降序
            }});for(User user : userList){System.out.println(user);}}
}

package com.ljq.test;import java.io.Serializable;/*** 用户** @author jqlin*/
public class User implements Serializable{private static final long serialVersionUID = 1L;private long id; // 主键private double salary; // 薪资public User() {}public User(long id, double salary) {super();this.id = id;this.salary = salary;}public long getId() {return id;}public void setId(long id) {this.id = id;}public double getSalary() {return salary;}public void setSalary(double salary) {this.salary = salary;}@Overridepublic String toString() {return "User [id=" + id + ", salary=" + salary + "]";}}

        Collections.sort(dataList, new Comparator<OrderVO>(){public int compare(OrderVO a, OrderVO b) {//先按期号降序，如果期号相同按玩法名称降序，如果玩法名称相同按投注时间降序int result = b.getCreateTime().compareTo(a.getCreateTime());if(result == Zero.INT){return new Integer(a.getSort()).compareTo(new Integer(b.getSort()));}else{return result;}}});