lamda表达式

业务层：

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/**  * 测试一下  */ @GetMapping("/test") public void test(@RequestBody(required = false) List<Person> roster, int low, int high) {     roster.forEach(p -> test2(p.getAge(), low, high)); }   private void test2(int age, int low, int high) {     if (low <= age && age < high) {         Person.printPerson(age);     } }

　　工具类

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package com.onlyphoto.jupiteragent.controller;   import java.time.LocalDate;     public class Person {       public enum Sex {         MALE, FEMALE     }     int age;     String name;     LocalDate birthday;     Sex gender;     String emailAddress;       public void setAge(int age) {         this.age = age;     }       public Person(int age, String name, LocalDate birthday, Sex gender, String emailAddress) {         this.age = age;         this.name = name;         this.birthday = birthday;         this.gender = gender;         this.emailAddress = emailAddress;     }       public Person(int age) {         this.age = age;     }       public String getName() {         return name;     }       public void setName(String name) {         this.name = name;     }       public LocalDate getBirthday() {         return birthday;     }       public void setBirthday(LocalDate birthday) {         this.birthday = birthday;     }       public Sex getGender() {         return gender;     }       public void setGender(Sex gender) {         this.gender = gender;     }       public String getEmailAddress() {         return emailAddress;     }       public void setEmailAddress(String emailAddress) {         this.emailAddress = emailAddress;     }       public int getAge() {         // ...         return this.age;     }       public static void printPerson(int age) {         // ... //        this.age = age;         System.out.println("年龄在合适范围的为: " + age);     } }