java 時間與字符串之間的轉換

1. long字符串轉換成yyyy-MM-dd HH:mm:ss格式輸出

import java.text.SimpleDateFormat;
import java.util.Date;
//將long字符串轉換成格式時間輸出
public class LongToString {
public static void main(String argsp[]){
    String time="1256006105375";

    Date date=new Date(Long.parseLong(time));
    SimpleDateFormat formatter=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    time=formatter.format(date);
    System.out.println(time);
}
}

2. 字符串轉換成時間

import java.text.SimpleDateFormat;
import java.util.Date;

import ognl.ParseException;

public class StringToDate {
public static void main(String argsp[]) throws Exception{
    String time="2010-11-20 11:10:10";

    Date date=null;
    SimpleDateFormat formatter=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    date=formatter.parse(time);
    System.out.println(date);
}
}

3. 取得當前系統時間，返回yyyy-MM-dd HH:mm:ss字符串

import java.text.SimpleDateFormat;
import java.util.Date;

public class StringToDate {
public static void main(String argsp[]) throws Exception{

    Date date=new Date();
    SimpleDateFormat formatter=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    String time=formatter.format(date);
    System.out.println(time);
}
}

4. 取得當前系統時間，返回 HH:mm:ss字符串

import java.text.SimpleDateFormat;
import java.util.Date;

public class StringToDate {
public static void main(String argsp[]) throws Exception{

    Date date=new Date();
    SimpleDateFormat formatter=new SimpleDateFormat("HH:mm:ss");
    String time=formatter.format(date);
    System.out.println(time);
}
}

5.將20101125102503轉換成2010-11-25 10:25:03輸出

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import java.text.SimpleDateFormat;
import java.util.Date;

public class StringToDate {
public static void main(String argsp[]) throws Exception{

    String time="20101125102503";
    SimpleDateFormat formatter1=new SimpleDateFormat("yyyy-HH-dd HH:mm:ss");
    SimpleDateFormat formatter2=new SimpleDateFormat("yyyyHHddHHmmss");
    time=formatter1.format(formatter2.parse(time));
    System.out.println(time);
}
}