package com.cm.cmdc.module.web;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
public class Test {
public static void main(String[] args) {
List<Person> personList = creatPersonList();
personList.stream().filter(p -> p.getName().indexOf("菲") > 0).forEach(p -> System.out.println(p.getName()));
personList.stream().forEach(p -> System.out.println(p.toString()));
double hight = personList.stream().filter(p -> p.getName().indexOf("菲") > 0).mapToDouble(p-> p.getHight()).average().getAsDouble();
System.out.println(hight);
int i = personList.stream().mapToInt(p->p.getAge()).max().getAsInt();
System.out.println("最大年龄" + i);
LocalDate localDate = LocalDate.now();
System.out.println(LocalDate.now());
LocalDate.of(2020, 12, 12).getYear();
localDate.getMonth();
LocalTime localTime = LocalTime.now();
localTime.getHour();
localTime.getMinute();
localTime.getSecond();
LocalDateTime localDateTime = LocalDateTime.now();//上两个类的结合
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
LocalDateTime date = LocalDateTime.parse("2020-12-12 13:23:03", formatter);
System.out.println(date.toString());
ZonedDateTime zonedDateTime = ZonedDateTime.now();
String strDate = zonedDateTime.format(formatter);
System.out.println(strDate+"ddddddddddddd");
}
public static List<Person> creatPersonList() {
List<Person> personList = new ArrayList<Person>();
Person person = new Person("张飞", 33, Person.Sex.MAN, 1.77);
personList.add(person);
person = new Person("王菲", 32, Person.Sex.WOMAN, 1.51);
personList.add(person);
person = new Person("刘亦菲", 18, Person.Sex.WOMAN, 1.49);
personList.add(person);
person = new Person("韩非", 29, Person.Sex.MAN, 1.77);
personList.add(person);
return personList;
}
}
==================================================================
package com.cm.cmdc.module.web;
public class Person {
public static enum Sex{
MAN, WOMAN;
}
private String name;
private int age;
private Sex gender;
private Double hight;
public Person() {
}
public Person(String name, int age, Sex gender, Double hight) {
super();
this.name = name;
this.age = age;
this.gender = gender;
this.hight = hight;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Sex getGender() {
return gender;
}
public void setGender(Sex gender) {
this.gender = gender;
}
public Double getHight() {
return hight;
}
public void setHight(Double hight) {
this.hight = hight;
}
@Override
public String toString() {
return "Person [name=" + name + ", age=" + age + ", gender=" + gender + ", hight=" + hight + "]";
}
}
