Java 查询当前日期和前后几天日期

package com.mars.test;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
*
* @author Administrator
*
*/
public class Test {
public static String[] date = new String[5];

/*
*
* 查询当前日期前(后)x天的日期
*
* @param date 当前日期
*
* @param day 天数（如果day数为负数,返回日期前的天数）
*
* @return yyyyMMdd
*/
public static String beforeOrAfterNumberDay(Date date, int day) {
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.DAY_OF_YEAR, day);
return new SimpleDateFormat("yyyy年MM月dd日").format(c.getTime());
}

public static void getdate() {
long nowDate = System.currentTimeMillis();
date[0] = "昨天: " + beforeOrAfterNumberDay(new Date(nowDate), -1);
date[1] = "前天: " + beforeOrAfterNumberDay(new Date(nowDate), -2);
date[2] = "今天: " + beforeOrAfterNumberDay(new Date(nowDate), 0);
date[3] = "明天: " + beforeOrAfterNumberDay(new Date(nowDate), 1);
date[4] = "后天: " + beforeOrAfterNumberDay(new Date(nowDate), 2);
}

public static void main(String[] args) {
getdate();
for (String string : date) {
System.out.println(string);
}
}
}