日期的截取和拼接

package com.ce.shi.test;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * @author caiyongji
 * 
 */
public class TestMain {
	public static void main(String[] args) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		// SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		Calendar beforeTime = Calendar.getInstance();
		beforeTime.add(Calendar.DAY_OF_MONTH, 1);
		Date before = beforeTime.getTime();
		String makestarttime = sdf.format(new Date()).replace("-", "") + "0000";// 开始时间
		String makeendtime = sdf.format(before).replace("-", "") + "0000";// 结束时间
		System.out.println(makestarttime);
		System.out.println(makeendtime);

		Calendar dayBefore = Calendar.getInstance();
		dayBefore.add(Calendar.DAY_OF_MONTH, -1);
		Date data = dayBefore.getTime();
		String theDayBefore = sdf.format(data).replace("-", "") + "0000";// 开始时间提前一天
		System.out.println(theDayBefore);

		System.out.println(makestarttime.substring(0, makestarttime.length() - 4));
	}
}

运行效果