Java8中的排序写法

1、声明一个测试对象

import java.time.LocalDate;
import java.util.List;
import lombok.Data;

@Data
public class StudentInfo{

//名称
private String name;

//性别 true男 false女
private Boolean gender;

//年龄
private Integer age;

//身高
private Double height;

//出生日期
private LocalDate birthday;
}

2、添加一些测试数据

//测试数据，请不要纠结数据的严谨性
List<StudentInfo> studentList = new ArrayList<>();
studentList.add(new StudentInfo("李小明",true,18,1.76,LocalDate.of(2001,3,23)));
studentList.add(new StudentInfo("张小丽",false,18,1.61,LocalDate.of(2001,6,3)));
studentList.add(new StudentInfo("王大朋",true,19,1.82,LocalDate.of(2000,3,11)));
studentList.add(new StudentInfo("陈小跑",false,17,1.67,LocalDate.of(2002,10,18)));
2.1 使用年龄进行升序排序
//排序前输出
StudentInfo.printStudents(studentList);
//按年龄排序(Integer类型)
List<StudentInfo> studentsSortName = studentList.stream().sorted(Comparator.comparing(StudentInfo::getAge)).collect(Collectors.toList());
//排序后输出
StudentInfo.printStudents(studentsSortName);

2.2 使用年龄进行降序排序（使用reversed()方法）

//排序前输出
StudentInfo.printStudents(studentList);
//按年龄排序(Integer类型)
List<StudentInfo> studentsSortName = studentList.stream().sorted(Comparator.comparing(StudentInfo::getAge).reversed()).collect(Collectors.toList());
//排序后输出
StudentInfo.printStudents(studentsSortName);

2.3 使用年龄进行降序排序，年龄相同再使用身高升序排序

//排序前输出
StudentInfo.printStudents(studentList);
//按年龄排序(Integer类型)
List<StudentInfo> studentsSortName = studentList.stream()
.sorted(Comparator.comparing(StudentInfo::getAge).reversed().thenComparing(StudentInfo::getHeight))
.collect(Collectors.toList());
//排序后输出
StudentInfo.printStudents(studentsSortName);

标签：LocalDate,studentsSortName,printStudents,studentList,StudentInfo,排序,写法,Java8
来源： https://www.cnblogs.com/guojunhai/p/16446281.html