Here you can find the source of parseDateTime(String original, int type)
public static java.util.Date parseDateTime(String original, int type) throws SQLException
//package com.java2s; /*//from w w w.java2 s. co m * This program is free software; you can redistribute it and/or modify it under the terms of * the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, * or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * You should have received a copy of the GNU General Public License along with this program; * if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ import java.sql.SQLException; import java.sql.Timestamp; import java.util.Calendar; import java.util.GregorianCalendar; import java.util.TimeZone; public class Main { public static final int TIMESTAMP = 1; public static final int DATE = 2; public static final int TIME = 3; public static java.util.Date parseDateTime(String original, int type) throws SQLException { String s = original; if (s == null) { return null; } try { int timeStart = 0; TimeZone tz = null; if (type == TIME) { timeStart = 0; } else { timeStart = s.indexOf(' ') + 1; if (timeStart <= 0) { // ISO 8601 compatibility timeStart = s.indexOf('T') + 1; } } int year = 1970, month = 1, day = 1; if (type != TIME) { if (s.startsWith("+")) { // +year s = s.substring(1); } // start at position 1 to support -year int s1 = s.indexOf('-', 1); int s2 = s.indexOf('-', s1 + 1); if (s1 <= 0 || s2 <= s1) { throw new SQLException("error format:" + s + " must format yyyy-mm-dd"); } year = Integer.parseInt(s.substring(0, s1)); month = Integer.parseInt(s.substring(s1 + 1, s2)); int end = timeStart == 0 ? s.length() : timeStart - 1; day = Integer.parseInt(s.substring(s2 + 1, end)); } int hour = 0, minute = 0, second = 0, nano = 0; if (type != DATE) { int s1 = s.indexOf(':', timeStart); int s2 = s.indexOf(':', s1 + 1); int s3 = s.indexOf('.', s2 + 1); if (s1 <= 0 || s2 <= s1) { throw new SQLException("error format:" + s + " must format hh:mm:ss"); } if (s.endsWith("Z")) { s = s.substring(0, s.length() - 1); tz = TimeZone.getTimeZone("UTC"); } else { int timeZoneStart = s.indexOf('+', s2 + 1); if (timeZoneStart < 0) { timeZoneStart = s.indexOf('-', s2 + 1); } if (timeZoneStart >= 0) { String tzName = "GMT" + s.substring(timeZoneStart); tz = TimeZone.getTimeZone(tzName); if (!tz.getID().equals(tzName)) { throw new SQLException("time zone name error :" + tz.getID() + " <>" + tzName); } s = s.substring(0, timeZoneStart).trim(); } } hour = Integer.parseInt(s.substring(timeStart, s1)); minute = Integer.parseInt(s.substring(s1 + 1, s2)); if (s3 < 0) { second = Integer.parseInt(s.substring(s2 + 1)); } else { second = Integer.parseInt(s.substring(s2 + 1, s3)); String n = (s + "000000000").substring(s3 + 1, s3 + 10); nano = Integer.parseInt(n); } } if (hour < 0 || hour > 23) { throw new IllegalArgumentException("hour: " + hour); } long time; try { time = getTime(false, tz, year, month, day, hour, minute, second, type != TIMESTAMP, nano); } catch (IllegalArgumentException e) { // special case: if the time simply doesn't exist, use the lenient version if (e.toString().indexOf("HOUR_OF_DAY") > 0) { time = getTime(true, tz, year, month, day, hour, minute, second, type != TIMESTAMP, nano); } else { throw e; } } switch (type) { case DATE: return new java.sql.Date(time); case TIME: return new java.sql.Time(time); case TIMESTAMP: { Timestamp ts = new Timestamp(time); ts.setNanos(nano); return ts; } default: throw new SQLException("error type:" + type); } } catch (IllegalArgumentException e) { throw new SQLException("IllegalArgumentException"); } } private static long getTime(boolean lenient, TimeZone tz, int year, int month, int day, int hour, int minute, int second, boolean setMillis, int nano) { Calendar c; if (tz == null) { c = Calendar.getInstance(); } else { c = Calendar.getInstance(tz); } c.setLenient(lenient); if (year <= 0) { c.set(Calendar.ERA, GregorianCalendar.BC); c.set(Calendar.YEAR, 1 - year); } else { c.set(Calendar.YEAR, year); } c.set(Calendar.MONTH, month - 1); // january is 0 c.set(Calendar.DAY_OF_MONTH, day); c.set(Calendar.HOUR_OF_DAY, hour); c.set(Calendar.MINUTE, minute); c.set(Calendar.SECOND, second); if (setMillis) { c.set(Calendar.MILLISECOND, nano / 1000000); } return c.getTime().getTime(); } }