目录
- 1、第一种是固定多个字段排序
- 2、第二种动态字段进行排序
1、第一种是固定多个字段排序
import Java.util.Arrays; import java.util.Comparator; import java.util.List; import java.util.stream.Collectors; class Person { String name; int age; double salary; public Person(String name, int age, double salary) { this.name = name; this.age = age; this.salary = salary; } @Override public String toString() { return "Person{" + "name='" + name + '\'' + ", age=" + age + ", salary=" + salary + '}'; } } public class Main { public staandroidtic void main(String[] args) { List<Person> people = Arrays.asList( new Person("张三", 30, 5000), new Person("李四", 25, 6000), new Person("王五", 35, 4000) ); List<Person> sortedPeople = people.stream() .sorted(Comparator.comparing(Person::getName).thenComparing(Person::getAge).thenComparing(Person::getSalary)) .collect(Collectors.toList()); sortedPeople.forEach(System.out::println); } }
2、第二种动态字段进行排序
import java.util.Arrays; import java.util.Comparator; import java.util.List; import java.util.stream.Collectors; class Person { String name; int age; double salary; public Person(String 编程客栈name, int age, double salary) { this.name = name; this.age = age; this.salary = salary; } @Override public String toString() { return "Person{" + "name='" + name + '\'' + ", age=" + age + ", salary=" + salary + '}'; } } public class Main { public static void main(String[] args) { List<Person> people = Arrays.asList( new Person("张三"编程, 30, 5000), new Person("www.devze.com李四", 25, 6000), new Person("王五", 35, 4000) ); // 动态传入排序字段 String sortField = "age"; // 可以修改为"name"或"salary" List<Person> sortedPeople = people.stream() .sorted(getComparator(sortField)) .collect(Collectors.toList()); System.out.println(sortedPeople); } private static Comparator<Person> getComparator(String sortField) { switch (sortField) { case "name": return Comparator.comparing(Person::getName); case "agephp": return Comparator.comparingInt(Person::getAge); case "salary": return Comparator.comparingDouble(Person::getSalary); default: throw new IllegalArgumentException("Invalid sort field: " + sortField); } } }
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