获取指定日期 前 / 后 一天 

 1 package com.ping;
 2 
 3 import java.text.SimpleDateFormat;
 4 import java.util.Calendar;
 5 
 6 public class Test {
 7 
 8     /**
 9      * 获取指定日期前一天
10      * @param specifiedDate 指定日期
11      * @return
12      * @throws Exception
13      */
14     public static String getSpecifiedDateBefore(String specifiedDate) throws Exception {
15         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
16 
17         Calendar calendar = Calendar.getInstance();
18         calendar.setTime(sdf.parse(specifiedDate));
19         calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - 1);
20 
21         return sdf.format(calendar.getTime());
22     }
23 
24     /**
25      * 获取指定日期后一天
26      * @param specifiedDate 指定日期
27      * @return
28      * @throws Exception
29      */
30     public static String getSpecifiedDateAfter(String specifiedDate) throws Exception {
31         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
32 
33         Calendar calendar = Calendar.getInstance();
34         calendar.setTime(sdf.parse(specifiedDate));
35         calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + 1);
36 
37         return sdf.format(calendar.getTime());
38     }
39 
40     public static void main(String[] args) {
41         try {
42             String date = "2017-08-21";
43             System.out.println("当前日期: " + date + ", 前一天: " + getSpecifiedDateBefore(date));
44             System.out.println("当前日期: " + date + ", 后一天: " + getSpecifiedDateAfter(date));
45         } catch (Exception e) {}
46     }
47     
48     // 打印结果: 
49     // 当前日期: 2017-08-21, 前一天: 2017-08-20
50     // 当前日期: 2017-08-21, 后一天: 2017-08-22
51 }

 

posted @ 2017-08-21 14:59  贺小平  阅读(403)  评论(0)    收藏  举报