参考两篇文章，代码具体还需要修改。
1、创建类。代码如下
2、在对应使用的地方调用就可以了。
DateUtils.getCurrentDate(); //获取系统当前时间
DateUtils.getDateToString(时间戳); //时间戳转为时间格式
DateUtils.getStringToDate(“时间格式”);//时间格式转为时间戳
public class Date_U {
/**
* 掉此方法输入所要转换的时间输入例如（"2014年06月14日16时09分00秒"）返回时间戳
*
* @param time
* @return
*/
public String data(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒",
Locale.CHINA);
Date date;
String times = null;
try {
date = sdr.parse(time);
long l = date.getTime();
String stf = String.valueOf(l);
times = stf.substring(0, 10);
Log.d("--444444---", times);
} catch (ParseException e) {
e.printStackTrace();
}
return times;
}
/**
* 掉此方法输入所要转换的时间输入例如（"2014-06-14-16-09-00"）返回时间戳
*
* @param time
* @return
*/
public String dataOne(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss",
Locale.CHINA);
Date date;
String times = null;
try {
date = sdr.parse(time);
long l = date.getTime();
String stf = String.valueOf(l);
times = stf.substring(0, 10);
Log.d("--444444---", times);
} catch (ParseException e) {
e.printStackTrace();
}
return times;
}
public static String getTimestamp(String time, String type) {
SimpleDateFormat sdr = new SimpleDateFormat(type, Locale.CHINA);
Date date;
String times = null;
try {
date = sdr.parse(time);
long l = date.getTime();
String stf = String.valueOf(l);
times = stf.substring(0, 10);
Log.d("--444444---", times);
} catch (ParseException e) {
e.printStackTrace();
}
return times;
}
/**
* 调用此方法输入所要转换的时间戳输入例如（1402733340）输出（"2014年06月14日16时09分00秒"）
*
* @param time
* @return
*/
public String times(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
@SuppressWarnings("unused")
long lcc = Long.valueOf(time);
int i = Integer.parseInt(time);
String times = sdr.format(new Date(i * 1000L));
return times;
}
/**
* 调用此方法输入所要转换的时间戳输入例如（1402733340）输出（"2014年06月14日16时09分"）
*
* @param time
* @return
*/
public String timet(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy年MM月dd日HH时mm分");
@SuppressWarnings("unused")
long lcc = Long.valueOf(time);
int i = Integer.parseInt(time);
String times = sdr.format(new Date(i * 1000L));
return times;
}
// 调用此方法输入所要转换的时间戳例如（1402733340）输出（"2014年06月14日16时09分00秒"）
public static String times(long timeStamp) {
SimpleDateFormat sdr = new SimpleDateFormat("MM月dd日 # HH:mm");
return sdr.format(new Date(timeStamp)).replaceAll("#",
getWeek(timeStamp));
}
private static String getWeek(long timeStamp) {
int mydate = 0;
String week = null;
Calendar cd = Calendar.getInstance();
cd.setTime(new Date(timeStamp));
mydate = cd.get(Calendar.DAY_OF_WEEK);
// 获取指定日期转换成星期几
if (mydate == 1) {
week = "周日";
} else if (mydate == 2) {
week = "周一";
} else if (mydate == 3) {
week = "周二";
} else if (mydate == 4) {
week = "周三";
} else if (mydate == 5) {
week = "周四";
} else if (mydate == 6) {
week = "周五";
} else if (mydate == 7) {
week = "周六";
}
return week;
}
// 并用分割符把时间分成时间数组
/**
* 调用此方法输入所要转换的时间戳输入例如（1402733340）输出（"2014-06-14-16-09-00"）
*
* @param time
* @return
*/
public String timesOne(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
@SuppressWarnings("unused")
long lcc = Long.valueOf(time);
int i = Integer.parseInt(time);
String times = sdr.format(new Date(i * 1000L));
return times;
}
/**
* 并用分割符把时间分成时间数组
*
* @param time
* @return
*/
public static String[] timestamp(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
@SuppressWarnings("unused")
long lcc = Long.valueOf(time);
int i = Integer.parseInt(time);
String times = sdr.format(new Date(i * 1000L));
String[] fenge = times.split("[年月日时分秒]");
return fenge;
}
/**
* 根据传递的类型格式化时间
*
* @param str
* @param type
* 例如：yy-MM-dd
* @return
*/
public static String getDateTimeByMillisecond(String str, String type) {
Date date = new Date(Long.valueOf(str));
SimpleDateFormat format = new SimpleDateFormat(type);
String time = format.format(date);
return time;
}
/**
* 分割符把时间分成时间数组
*
* @param time
* @return
*/
public String[] division(String time) {
String[] fenge = time.split("[年月日时分秒]");
return fenge;
}
/**
* 输入时间戳变星期
*
* @param time
* @return
*/
public static String changeweek(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
long lcc = Long.valueOf(time);
int i = Integer.parseInt(time);
String times = sdr.format(new Date(i * 1000L));
Date date = null;
int mydate = 0;
String week = null;
try {
date = sdr.parse(times);
Calendar cd = Calendar.getInstance();
cd.setTime(date);
mydate = cd.get(Calendar.DAY_OF_WEEK);
// 获取指定日期转换成星期几
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (mydate == 1) {
week = "星期日";
} else if (mydate == 2) {
week = "星期一";
} else if (mydate == 3) {
week = "星期二";
} else if (mydate == 4) {
week = "星期三";
} else if (mydate == 5) {
week = "星期四";
} else if (mydate == 6) {
week = "星期五";
} else if (mydate == 7) {
week = "星期六";
}
return week;
}
/**
* 获取日期和星期 例如：２０１４－１１－１３ １１:００ 星期一
*
* @param time
* @param type
* @return
*/
public static String getDateAndWeek(String time, String type) {
return getDateTimeByMillisecond(time + "000", type) + " "
+ changeweekOne(time);
}
/**
* 输入时间戳变星期
*
* @param time
* @return
*/
public static String changeweekOne(String time) {
SimpleDateFormat sdr = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
long lcc = Long.valueOf(time);
int i = Integer.parseInt(time);
String times = sdr.format(new Date(i * 1000L));
Date date = null;
int mydate = 0;
String week = null;
try {
date = sdr.parse(times);
Calendar cd = Calendar.getInstance();
cd.setTime(date);
mydate = cd.get(Calendar.DAY_OF_WEEK);
// 获取指定日期转换成星期几
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (mydate == 1) {
week = "星期日";
} else if (mydate == 2) {
week = "星期一";
} else if (mydate == 3) {
week = "星期二";
} else if (mydate == 4) {
week = "星期三";
} else if (mydate == 5) {
week = "星期四";
} else if (mydate == 6) {
week = "星期五";
} else if (mydate == 7) {
week = "星期六";
}
return week;
}
/**
* 获取当前时间
*
* @return
*/
public static String getCurrentTime() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分");
return sdf.format(new java.util.Date());
}
/**
* 输入日期如（2014年06月14日16时09分00秒）返回（星期数）
*
* @param time
* @return
*/
public String week(String time) {
Date date = null;
SimpleDateFormat sdr = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
int mydate = 0;
String week = null;
try {
date = sdr.parse(time);
Calendar cd = Calendar.getInstance();
cd.setTime(date);
mydate = cd.get(Calendar.DAY_OF_WEEK);
// 获取指定日期转换成星期几
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (mydate == 1) {
week = "星期日";
} else if (mydate == 2) {
week = "星期一";
} else if (mydate == 3) {
week = "星期二";
} else if (mydate == 4) {
week = "星期三";
} else if (mydate == 5) {
week = "星期四";
} else if (mydate == 6) {
week = "星期五";
} else if (mydate == 7) {
week = "星期六";
}
return week;
}
/**
* 输入日期如（2014-06-14-16-09-00）返回（星期数）
*
* @param time
* @return
*/
public String weekOne(String time) {
Date date = null;
SimpleDateFormat sdr = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
int mydate = 0;
String week = null;
try {
date = sdr.parse(time);
Calendar cd = Calendar.getInstance();
cd.setTime(date);
mydate = cd.get(Calendar.DAY_OF_WEEK);
// 获取指定日期转换成星期几
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (mydate == 1) {
week = "星期日";
} else if (mydate == 2) {
week = "星期一";
} else if (mydate == 3) {
week = "星期二";
} else if (mydate == 4) {
week = "星期三";
} else if (mydate == 5) {
week = "星期四";
} else if (mydate == 6) {
week = "星期五";
} else if (mydate == 7) {
week = "星期六";
}
return week;
}
来源URL：http://home.bdqn.cn/thread-46937-1-1.html
http://zhidao.baidu.com/question/809626037013041252.html