java - 我如何将 java.sql.Date 格式化为 MM/dd/yyyy

Question

我的代码是

final long MILLIS_IN_A_DAY = 1000*60*60*24;
Date yesterdaydate= new java.sql.Date(new java.util.Date().getTime() - MILLIS_IN_A_DAY);
out.println(yesterdaydate);

我得到的输出格式是 yyyy/mm/dd ..我怎样才能在 MM/dd/yyyy 中得到它

Answer 1

要获取昨天的日期并对其进行格式化，您有 3 个选择：

// Use Java 8+ LocalDate
java.time.LocalDate yesterday = LocalDate.now().minusDays(1);

String text = yesterday.format(DateTimeFormatter.ofPattern("MM/dd/uuuu"));

// Use Joda-Time (3rd-party library)
org.joda.time.LocalDate yesterday = LocalDate.now().minusDays(1);

String text = yesterday.toString("MM/dd/yyyy");

// Use Calendar (all Java versions, no 3rd-party library)
java.util.Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_ON_MONTH, -1);
java.util.Date yesterday = cal.getTime();

String text = new SimpleDateFormat("MM/dd/yyyy").format(yesterday);

请注意，Calendar版本仍然会产生带有时间的“日期”值。需要额外的代码来清除时间字段。

Answer 2

请不要那样做。Date使用Object获取日期并使用SimpleDateFormat. 这很简单 。不要对价值进行硬编码。它不方便程序员。请找到代码

Date date  = new Date();//Today Date
SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");// FOrmat in This Format or you change Change as well 
String Format= format.format(date);
System.out.println(Format);// 01/06/2016

或者

Calendar TodayDate = Calendar.getInstance();
TodayDate.add(Calendar.DAY_ON_MONTH, -1);//import java.util.*
Date yesterday = cal.getTime();
SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");
String Format = format.format(yesterday);
System.out.println(Format);// 01/06/2016

Answer 3

SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");
String DateToStr = format.format(yesterdaydate);
out.println(DateToStr);