JAVA stream().sorted()对List集合进行排序

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先定义一个排序类：

@Data
@AllArgsConstructor
public class Student {

    private String name;

    private Boolean gender;

    private Integer age;

    private Double height;

    private LocalDate birthday;
}

测试排序：

    @Test
    void sortTest() {

        List<Student> studentList = Lists.newArrayList();
        studentList.add(new Student("张飞", true, 13, 1.73, LocalDate.of(1988, 3, 23)));
        studentList.add(new Student("李逵", false, 18, 1.31, LocalDate.of(1888, 6, 3)));
        studentList.add(new Student("关羽", true, 19, 1.32, LocalDate.of(2001, 3, 11)));
        studentList.add(new Student("林冲", false, 17, 1.37, LocalDate.of(2005, 10, 18)));

        //1.按照年龄排序（降序）
        studentList
                .stream()
                .sorted(Comparator.comparing(Student::getAge).reversed())
                .forEach(student -> System.out.println(student.toString()));

        //2.按照年龄排序（升序）
        studentList
                .stream()
                .sorted(Comparator.comparing(Student::getAge))
                .forEach(student -> System.out.println(student.toString()));

        //2.先按年龄排序再按照身高排序（升序）多个字段排序
        studentList.stream()
                .sorted(Comparator.comparing(Student::getAge).thenComparing(Student::getHeight))
                .forEach(student -> System.out.println(student.toString()));

    }

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