java 动态表格列

 package com.company;

import java.util.*;

class User{
    private String channelName;
    private String channelId;
    private String passenger;
    private String startDate;
    private String endDate;

    public String getPassenger() {
        return passenger;
    }

    public void setPassenger(String passenger) {
        this.passenger = passenger;
    }

    public String getChannelName() {
        return channelName;
    }

    public void setChannelName(String channelName) {
        this.channelName = channelName;
    }

    public String getStartDate() {
        return startDate;
    }

    public String getEndDate() {
        return endDate;
    }

    public void setEndDate(String endDate) {
        this.endDate = endDate;
    }

    public void setStartDate(String startDate) {
        this.startDate = startDate;
    }

    public String getChannelId() {
        return channelId;
    }

    public void setChannelId(String channelId) {
        this.channelId = channelId;
    }
}
public class Main {

    public static void main(String[] args) {
        // write your code here
        User u1 = new User();
        u1.setChannelId("1001");
        u1.setChannelName("通道1");
        u1.setPassenger("0.2");
        u1.setStartDate("7:30");
        u1.setEndDate("8:00");
        User u2 = new User();
        u2.setChannelId("1002");
        u2.setChannelName("通道2");
        u2.setPassenger("0.4");
        u2.setStartDate("7:30");
        u2.setEndDate("8:00");
        User u3 = new User();
        u3.setChannelId("1001");
        u3.setChannelName("通道1");
        u3.setPassenger("0.3");
        u3.setStartDate("8:00");
        u3.setEndDate("8:30");
        User u4 = new User();
        u4.setChannelId("1002");
        u4.setChannelName("通道2");
        u4.setPassenger("0.5");
        u4.setStartDate("8:00");
        u4.setEndDate("8:30");
        List<User> list = new ArrayList<User>();
        list.add(u1);
        list.add(u2);
        list.add(u3);
        list.add(u4);
        Map<String, List<User>> map = new HashMap<String, List<User>>();

        Iterator it = list.iterator();
        // 按照开始时间分组
        for(int i=0;i<list.size();i++){
            User u = (User) list.get(i);
            if (map.get(u.getStartDate()) != null) {
                List<User> list2 =  map.get(u.getStartDate());
                list2.add(u);
            } else {
                List<User> list3 = new ArrayList<User>();
                map.put(u.getStartDate(), list3);
                list3.add(u);
            }
        }
        for (String key : map.keySet()) {
            System.out.println(key);
            System.out.println(map.get(key));

        }
        // 动态列key和value的生成
        List<Map<String, String>> allList = new ArrayList<Map<String, String>>();
        for (String key : map.keySet()) {
            List<User> list4 = (List) map.get(key);
            Map<String, String> m = new HashMap<String, String>();
            for(int i = 0; i < list4.size(); i++){
                if(i == 0){
                    User us = list4.get(i);
                    m.put("startDate", us.getStartDate());
                    m.put("endDate", us.getEndDate());
                }
                User u = list4.get(i);
                m.put(u.getChannelId(), u.getPassenger());
            }
            allList.add(m);
        }

        for(int i=0;i<allList.size();i++){
            System.out.println(allList.get(i));
        }
    }
}