特定string to date:
String pattern = "yyyyMMdd"; SimpleDateFormat sdf = new SimpleDateFormat(pattern); Date startTime = null; Date endTime = null; try { startTime = sdf.parse("20090420"); endTime = sdf.parse("20090426"); } catch (ParseException e) { e.printStackTrace(); }
将data to 特定string.new SimpleDateFormat("yyyy/MM/dd").format(c.getTime());
还有c.roll(Calendar.DATE, -7)不进行更大单位的滚动，这个在跨月份的时候会出现问题，可以采用c.add()代替。
import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;public class GetTime { /** * @param args */ public static void main(String[] args) { Date date = new Date(System.currentTimeMillis());// System.out.println(date); String firstDayOfCurrentWeek = getFirstDayOfCurrentWeek(date); System.out.println(firstDayOfCurrentWeek); String firstDayOfLastWeek = getFirstDayOfLastWeek(date); System.out.println(firstDayOfLastWeek); } // 获得周一的日期 public static String getFirstDayOfCurrentWeek(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); c.set(Calendar.DAY_OF_WEEK,Calendar.MONDAY); return new SimpleDateFormat("yyyy/MM/dd").format(c.getTime()); } public static String getFirstDayOfLastWeek(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); c.set(Calendar.DAY_OF_WEEK,Calendar.MONDAY); c.roll(Calendar.DATE, -7); return new SimpleDateFormat("yyyy/MM/dd").format(c.getTime()); }}
相关资源：JAVA_API1.6文档（中文）
