date日期类型与String类型的相互转化
- /**
- * 将时间字符串转换为Date类型
- * @param dateStr
- * @return Date
- */
- public static Date toDate(String dateStr) {
- Date date = null;
- SimpleDateFormat formater = new SimpleDateFormat();
- formater.applyPattern("yyyy-MM-dd");
- try {
- date = formater.parse(dateStr);
- } catch (ParseException e) {
- e.printStackTrace();
- }
- return date;
- }
- /**
- * 按照提供的格式将字符串转换成Date类型
- * @param dateStr
- * @param formaterString
- * @return
- */
- public static Date toDate(String dateStr, String formaterString) {
- Date date = null;
- SimpleDateFormat formater = new SimpleDateFormat();
- formater.applyPattern(formaterString);
- try {
- date = formater.parse(dateStr);
- } catch (ParseException e) {
- e.printStackTrace();
- }
- return date;
- }
- /**
- * 将Date类型时间转换为字符串
- * @param date
- * @return
- */
- public static String toString(Date date) {
- String time;
- SimpleDateFormat formater = new SimpleDateFormat();
- formater.applyPattern("yyyy-MM-dd");
- time = formater.format(date);
- return time;
- }
- /**
- * 按照参数提供的格式将Date类型时间转换为字符串
- * @param date
- * @param formaterString
- * @return
- */
- public static String toString(Date date, String formaterString) {
- String time;
- SimpleDateFormat formater = new SimpleDateFormat();
- formater.applyPattern(formaterString);
- time = formater.format(date);
- return time;
- }
- /**
- * method 将字符串类型的日期转换为一个timestamp(时间戳记java.sql.Timestamp)
- * @param dateString
- * 需要转换为timestamp的字符串
- * @return dataTime timestamp
- */
- public final static java.sql.Timestamp string2Time(String dateString)
- throws java.text.ParseException {
- DateFormat dateFormat;
- // dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss.SSS",
- // Locale.ENGLISH);// 设定格式
- dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm");
- dateFormat.setLenient(false);
- java.util.Date timeDate = dateFormat.parse(dateString);// util类型
- java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());// Timestamp类型,timeDate.getTime()返回一个long型
- return dateTime;
- }
- /**
- * method 将字符串类型的日期按照转换为一个timestamp(时间戳记java.sql.Timestamp)
- *
- * @param dateString 需要转换为timestamp的字符串
- * @param formaterString dateString字符串的解析格式
- * @return
- * @throws java.text.ParseException
- */
- public final static java.sql.Timestamp string2Time(String dateString,
- String formaterString) throws java.text.ParseException {
- DateFormat dateFormat;
- dateFormat = new SimpleDateFormat(formaterString);// 设定格式
- // dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss");
- dateFormat.setLenient(false);
- java.util.Date timeDate = dateFormat.parse(dateString);// util类型
- java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());// Timestamp类型,timeDate.getTime()返回一个long型
- return dateTime;
- }
- public static void main(String[] args) throws ParseException {
- String t = DateUtil.toString(new Date());
- System.out.println(t);
- Date date = DateUtil.toDate("2010-06-17");
- System.out.println(date);
- // String sToTimestamp = "2005-8-18 14:21:12.123";// 用于转换成java.sql.Timestamp的字符串
- String sToTimestamp = "2005-8-18 14:21";// 用于转换成java.sql.Timestamp的字符串
- Timestamp Timestamp = string2Time(sToTimestamp);
- System.out.println(Timestamp);
- }
- }