转载自作者:happy_fish
//日期和时间处理示例import java.util.*;
import java.text.SimpleDateFormat;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;public class TestDateTime
{
public static void main(String[] argv)
{
long nCurrentTime = System.currentTimeMillis();
java.util.Date utilDate = new java.util.Date(nCurrentTime); //以下是用于数据库操作的日期和时间类
java.sql.Date sqlDate = new java.sql.Date(utilDate.getTime()); //java.util.Date和java.sql.Date的转换
java.sql.Time sqlTime = new java.sql.Time(utilDate.getTime());
java.sql.Timestamp sqlTimestamp = new java.sql.Timestamp(nCurrentTime); //Calendar用于获取指定的时间项(字段)
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(nCurrentTime); int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH) + 1; //注意:返回的月份是基于0的!
int day = calendar.get(Calendar.DAY_OF_MONTH);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
int minute = calendar.get(Calendar.MINUTE);
int second = calendar.get(Calendar.SECOND); System.out.println("Current date is: " + year + "年" + month + "月" + day + "日");
System.out.println("Current time is: " + hour + "时" + minute + "分" + second + "秒"); //SimpleDateFormat用于格式化日期和时间
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String szDatetime1 = df.format(utilDate);
System.out.println("Current datetime is: " + szDatetime1); //以下计算两个日期值之间相差的时间
java.util.Date date2 = new java.util.Date(nCurrentTime - 24600 * 1000); long nMilliSeconds = utilDate.getTime() - date2.getTime();
long nSeconds = nMilliSeconds / 1000; //把毫秒换算成秒
double nDays = nSeconds / (24d * 60d * 60d); //把秒换算成天 String szDatetime2 = df.format(date2);
System.out.println("Time between " + szDatetime1 + " and " + szDatetime2 + " is " + nSeconds + " seconds (" + nDays + " days)");
}
}
//日期和时间处理示例import java.util.*;
import java.text.SimpleDateFormat;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;public class TestDateTime
{
public static void main(String[] argv)
{
long nCurrentTime = System.currentTimeMillis();
java.util.Date utilDate = new java.util.Date(nCurrentTime); //以下是用于数据库操作的日期和时间类
java.sql.Date sqlDate = new java.sql.Date(utilDate.getTime()); //java.util.Date和java.sql.Date的转换
java.sql.Time sqlTime = new java.sql.Time(utilDate.getTime());
java.sql.Timestamp sqlTimestamp = new java.sql.Timestamp(nCurrentTime); //Calendar用于获取指定的时间项(字段)
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(nCurrentTime); int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH) + 1; //注意:返回的月份是基于0的!
int day = calendar.get(Calendar.DAY_OF_MONTH);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
int minute = calendar.get(Calendar.MINUTE);
int second = calendar.get(Calendar.SECOND); System.out.println("Current date is: " + year + "年" + month + "月" + day + "日");
System.out.println("Current time is: " + hour + "时" + minute + "分" + second + "秒"); //SimpleDateFormat用于格式化日期和时间
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String szDatetime1 = df.format(utilDate);
System.out.println("Current datetime is: " + szDatetime1); //以下计算两个日期值之间相差的时间
java.util.Date date2 = new java.util.Date(nCurrentTime - 24600 * 1000); long nMilliSeconds = utilDate.getTime() - date2.getTime();
long nSeconds = nMilliSeconds / 1000; //把毫秒换算成秒
double nDays = nSeconds / (24d * 60d * 60d); //把秒换算成天 String szDatetime2 = df.format(date2);
System.out.println("Time between " + szDatetime1 + " and " + szDatetime2 + " is " + nSeconds + " seconds (" + nDays + " days)");
}
}
import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.Date;/**
*实现如何从字符中time得到时间Date对象只要SimpleDateFormate(String patter)中的每个字符与time的字符对应就行,比如:
time: "1981-07-09 10:30:15" 或: "19810709103015"
patter: "yyyy-MM-dd hh:mm:ss" "yyyyMMddhhmmss"*/
public class DatetimeFormat{
/**将一个表示时间的字符串转换成标准格式
*@param strTime --一个表示时间的字符串
*@return String ---标准格式的时间字符串
*/
public static String Convert(String strTime){
String format1 = "yy/MM/dd"; //设置格式
String format2 = "yyyy/MM/dd";
String rtnStr = "";
try{
SimpleDateFormat tf = new SimpleDateFormat(format1);
Date date = tf.parse(strTime);//字符串转换成Date
tf.applyPattern(format2);
rtnStr = tf.format(date); //Date转换成字符串
}catch(NullPointerException e){
System.out.println("the pattern is null.");
}catch(IllegalArgumentException ex){
System.out.println("the pattern is invalid.");
}catch(ParseException e){
System.out.println("time format error.");
}
return rtnStr;
}
public static void main(String[] args){
String time1 = "20/8/02";
String time2 = "19810709103015"; System.out.println(Convert("20/8/02"));
System.out.println(Convert("2002/08/2"));
}
}
Format fmt = new SimpleDateFormat ("yyyy年MM月dd日");
String strDate = fmt.format (rs.getDate ("DATES"));//字符型转换成日期型
SimpleDateFormat fmtDate = new SimpleDateFormat ("yyyy年MM月dd日");
java.util.Date dte = fmtDate.parse("2004/08/01");http://community.csdn.net/Expert/topic/3281/3281760.xml?temp=.4909479