java.time.LocalDateTime

1 java.time.LocalDateTime介绍

Java LocalDateTime类是一个不可变的日期时间对象，代表日期时间，其默认格式为yyyy-MM-dd-HH-mm-ss.zzz。它继承了对象类并实现了ChronoLocalDateTime接口。

2 java.time.LocalDateTime声明

让我们看看java.time.LocalDateTime类的声明。

public final class LocalDateTime extends Object   
implements Temporal, TemporalAdjuster, ChronoLocalDateTime<LocalDate>, Serializable  

3 java.time.LocalDateTime方法

4 java.time.LocalDateTime案例1

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
import java.time.LocalDateTime;  
import java.time.format.DateTimeFormatter;  
public class LocalDateTimeExample1 {  
    public static void main(String[] args) {  
        LocalDateTime now = LocalDateTime.now();  
        System.out.println("Before Formatting: " + now);  
        DateTimeFormatter format = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss");  
        String formatDateTime = now.format(format);  
        System.out.println("After Formatting: " + formatDateTime);  
    }  
}  

输出结果为：

Before Formatting: 2017-01-13T17:09:42.411
After Formatting: 13-01-2017 17:09:42

5 java.time.LocalDateTime案例2

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
import java.time.LocalDateTime;  
import java.time.format.DateTimeFormatter;  
public class LocalDateTimeExample2 {  
  public static void main(String[] args) {  
    LocalDateTime datetime1 = LocalDateTime.now();  
    DateTimeFormatter format = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss");  
    String formatDateTime = datetime1.format(format);   
    System.out.println(formatDateTime);    
  }  
}  

输出结果为：

14-01-2017 11:42:32