java如何以一定的格式显示时间

[victorgaoysh]

？
最好有个例子

[snowredfox]

import java.util.* ;
import java.text.* ;

SimpleDateFormat formatter
= new SimpleDateFormat ("yyyyy.MM.dd G hh:mm a");

Date currentTime = new Date();
String dateString = formatter.format(currentTime);

[sharetop]

String clicktime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new java.util.Date());

[gzwrj]

public static String GetDateStr(java.sql.Timestamp rDate, String rDateFormat) {
SimpleDateFormat lFormat;
String lRtnStr = "";

lFormat = new SimpleDateFormat(rDateFormat);
lRtnStr = lFormat.format(rDate);

return lRtnStr;
}

public static String GetDateStr(java.util.Date rDate, String rDateFormat) {
SimpleDateFormat lFormat;
String lRtnStr = "";

lFormat = new SimpleDateFormat(rDateFormat);
lRtnStr = lFormat.format(rDate);

return lRtnStr;
}

[GJA106]

import java.lang.*;
import java.util.*;
import java.io.*;
import java.io.InputStream;
import java.util.Date;
import java.awt.*;
import java.text.*;
import java.awt.event.*;
import javax.swing.*;

public class TestTime
{
byte bByte[]=new byte[5];


public TestTime()
{
bByte[0]='t';
TimeTest();
Chinese();

HexTest(bByte,1);

}

public void TimeTest()
{
String lastdate="";
/*
Symbol Meaning Presentation Example
------ ------- ------------ -------
G era designator (Text) AD
y year (Number) 1996
M month in year (Text & Number) July & 07
d day in month (Number) 10
h hour in am/pm (1~12) (Number) 12
H hour in day (0~23) (Number) 0
m minute in hour (Number) 30
s second in minute (Number) 55
S millisecond (Number) 978
E day in week (Text) Tuesday
D day in year (Number) 189
F day of week in month (Number) 2 (2nd Wed in July)
w week in year (Number) 27
W week in month (Number) 2
a am/pm marker (Text) PM
k hour in day (1~24) (Number) 24
K hour in am/pm (0~11) (Number) 0
z time zone (Text) Pacific Standard Time
' escape for text (Delimiter)
'' single quote (Literal) '


Examples Using the US Locale:

Format Pattern Result
-------------- -------
"yyyy.MM.dd G 'at' hh:mm:ss z" ->> 1996.07.10 AD at 15:08:56 PDT
"EEE, MMM d, ''yy" ->> Wed, July 10, '96
"h:mm a" ->> 12:08 PM
"hh 'o''clock' a, zzzz" ->> 12 o'clock PM, Pacific Daylight Time
"K:mm a, z" ->> 0:00 PM, PST
"yyyyy.MMMMM.dd GGG hh:mm aaa" ->> 1996.July.10 AD 12:08 PM

Code Sample:

SimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, "PST");
pdt.setStartRule(DateFields.APRIL, 1, DateFields.SUNDAY, 2*60*60*1000);
pdt.setEndRule(DateFields.OCTOBER, -1, DateFields.SUNDAY, 2*60*60*1000);
// Format the current time.
SimpleDateFormat formatter
= new SimpleDateFormat ("yyyy.mm.dd e 'at' hh:mm:ss a zzz");
Date currentTime_1 = new Date();
String dateString = formatter.format(currentTime_1);
// Parse the previous string back into a Date.
ParsePosition pos = new ParsePosition(0);
Date currentTime_2 = formatter.parse(dateString, pos);


*/
//mmm代表月份--大写M代表用汉字表示，小写代表用数字表示,3个m代表月份用3位数来表示.
SimpleDateFormat formatter = new SimpleDateFormat("EEE mm dd hh:mm:ss yyyy", Locale.getDefault());
Date currentDate = new Date();
lastdate = formatter.format(currentDate);
System.out.println("SimpleDateFormat:"+lastdate);


SimpleDateFormat m_oFormatTimeOnly=new SimpleDateFormat("hh:mm:ss", Locale.getDefault());
String m_strOnlyTime = m_oFormatTimeOnly.format(currentDate);
System.out.println("OnlyTime:"+m_strOnlyTime);

SimpleDateFormat m_oFormatOnlyYear=new SimpleDateFormat("yyyy", Locale.getDefault());
String m_strOnlyYear = m_oFormatOnlyYear.format(currentDate);
System.out.println("OnlyYear:"+m_strOnlyYear);

SimpleDateFormat m_oFormatYMD=new SimpleDateFormat("yyyy.MM.dd", Locale.getDefault());
String m_strOnlyYMD = m_oFormatYMD.format(currentDate);
System.out.println("OnlyYear:"+m_strOnlyYMD);
}

private void Chinese()
{
char m_cChar='中';
byte m_Byte[]=new byte[20];
String str="q中中";
m_Byte=str.getBytes();
System.out.println("中文："+m_Byte.length);
if(m_Byte[1]<0)
System.out.println("m_Byte[1]<0");
if(m_Byte[0]<0)
System.out.println("m_Byte[0]<0");

m_Byte=null;

String str2="aaaa";
m_Byte=str2.getBytes();
System.out.println(m_Byte.length);
if(m_Byte[1]>0)
System.out.println("m_Byte[1]>0");
if(m_Byte[0]>0)
System.out.println("m_Byte[0]>0");
}

private void HexTest(byte abyte[],int i)
{
char hex_char[]={'0','1','2','3','4','5','6','7','8','9','a'
,'b','c','d','e','f'};

String s=new String();
for(int j=0;j<4;j++)
{
s=s+hex_char[abyte[i+j]>>4&0xf];
System.out.println(j+"s1");
s=s+hex_char[abyte[i+j]&0xf];
System.out.println(j+"s2");
}
}

public static void main(String args[])
{
TestTime m_oTest5=new TestTime();
System.out.println("current Root:"+new File(".").getAbsolutePath().substring(0,2));

File[] fs = File.listRoots();
System.out.println("size:"+fs.length);
for(int i=0;i<fs.length;i++)
System.out.println(fs[i].getPath());

System.out.println("Time:"+System.currentTimeMillis());



AWTEvent event=null;
KeyStroke ks = KeyStroke.getKeyStrokeForEvent((KeyEvent)event);
System.out.println("Enter:"+ks);

}


}