JAVA DateUtils工具类

 直接贴代码，后续继续更新... 

import java.text.ParseException;
import java.util.Calendar;
import java.util.Date;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateFormatUtils;
import org.apache.commons.lang3.time.FastDateFormat;

public class DateUtil {
private static FastDateFormat timeFormat = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss");
private static FastDateFormat dateFormat;
private static FastDateFormat timeFormat2;
private static FastDateFormat format;

static {
  dateFormat = DateFormatUtils.ISO_DATE_FORMAT;
timeFormat2 = FastDateFormat.getInstance("yyyyMMddHHmmss");
format = FastDateFormat.getInstance("MM/dd/yyyy");
}

public DateUtil() {
}

public static String date2String(Date date) {
return dateFormat.format(date);
}

public static String time2String(Date date) {
return timeFormat.format(date);
}

public static String time2String2(Date date) {
return timeFormat2.format(date);
}

public static Date String2time(String date) {
if(StringUtils.isBlank(date)) {
return null;
} else {
try {
return timeFormat.parse(date);
} catch (ParseException var2) {
var2.printStackTrace();
return null;
}
}
}

public static Date String2date(String date) {
if(StringUtils.isBlank(date)) {
return null;
} else {
try {
return dateFormat.parse(date);
} catch (ParseException var2) {
var2.printStackTrace();
return null;
}
}
}

public static Date Str2date(String date) {
if(StringUtils.isBlank(date)) {
return null;
} else {
try {
return format.parse(date);
} catch (ParseException var2) {
var2.printStackTrace();
return null;
}
}
}

public static String date2Str(Date date) {
return format.format(date);
}

public static Date getTodayStartTime() {
Calendar cal = Calendar.getInstance();
cal.set(11, 0);
cal.set(13, 0);
cal.set(12, 0);
cal.set(14, 0);
return cal.getTime();
}

public static Date getTodayEndTime() {
Calendar cal = Calendar.getInstance();
cal.set(11, 24);
cal.set(13, 0);
cal.set(12, 0);
cal.set(14, 0);
return cal.getTime();
}

public static Date getDateStartTime(Date date) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(11, 0);
cal.set(12, 0);
cal.set(13, 0);
return cal.getTime();
}

public static Date getDateEndTime(Date date) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(11, 23);
cal.set(12, 59);
cal.set(13, 59);
return cal.getTime();
}

public static Date getWeekStartTime() {
Calendar cal = Calendar.getInstance();
cal.set(cal.get(1), cal.get(2), cal.get(5), 0, 0, 0);
cal.set(7, 2);
return cal.getTime();
}

public static Date getWeekEndTime() {
Calendar cal = Calendar.getInstance();
cal.setTime(getWeekStartTime());
cal.add(7, 7);
return cal.getTime();
}

public static Date getMonthStartTime() {
Calendar cal = Calendar.getInstance();
cal.set(cal.get(1), cal.get(2), cal.get(5), 0, 0, 0);
cal.set(5, cal.getActualMinimum(5));
return cal.getTime();
}

public static Date getMonthEndTime() {
Calendar cal = Calendar.getInstance();
cal.set(cal.get(1), cal.get(2), cal.get(5), 0, 0, 0);
cal.set(5, cal.getActualMaximum(5));
cal.set(11, 24);
return cal.getTime();
}


}