Stream 获取集合中符合条件的最新（时间）的记录
package cn.shanxincd.ih.test;
import cn.hutool.core.date.DateUtil;
import cn.shanxincd.ih.entity.SyUser;
import java.util.ArrayList;
import java.util.List;
/**
* @ClassName NewDataTest
* @Description TODO
* @Author @yangfeng
* @Date 2022/11/3 16:13
* @Version 1.0
*/
public class NewDataTest {
public static void main(String[] args) {
//1.构建list集合
List<SyUser> list = new ArrayList<SyUser>();
//2.添加模拟的测试数据
SyUser syUser1 = new SyUser("张三","zs0001","2022-11-01 09:12:33",DateUtil.parseDate("2022-01-03"));
SyUser syUser2 = new SyUser("张三","zs0002","2022-11-02 10:12:33",DateUtil.parseDate("2022-01-02"));
SyUser syUser3 = new SyUser("张三","zs0003","2022-11-03 11:12:33",DateUtil.parseDate("2022-01-01"));
SyUser syUser4 = new SyUser("李四","ls0001","2022-11-02 11:12:33",DateUtil.parseDate("2022-01-06"));
SyUser syUser5 = new SyUser("李四","ls0001","2022-11-03 12:12:33",DateUtil.parseDate("2022-01-05"));
SyUser syUser6 = new SyUser("李四","ls0001","2022-11-04 13:12:33",DateUtil.parseDate("2022-01-04"));
list.add(syUser1);
list.add(syUser2);
list.add(syUser3);
list.add(syUser4);
list.add(syUser5);
list.add(syUser6);
//获取张三和李四对应的最新的时间数据
SyUser user = list.stream().filter(syUser -> syUser.getName().equals("张三")).max((u1, u2) -> u1.getDataStr().compareTo(u2.getDataStr())).orElse(null);
System.out.println(user);
//根据日期获取李四对应的最新的数据
SyUser user100 = list.stream().filter(syUser -> syUser.getName().equals("李四")).max((u1, u2) -> u1.getCreateTime().compareTo(u2.getCreateTime())).orElse(null);
System.out.println(user100);
}
}