java 时间与字符串之间的转换

1. long字符串转换成yyyy-MM-dd HH:mm:ss格式输出

[java]


import java.text.SimpleDateFormat;

import java.util.Date;

//将long字符串转换成格式时间输出

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. 字符串转换成时间

[java]

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. 取得当前系统时间，返回yyyy-MM-dd HH:mm:ss字符串

[java]


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. 取得当前系统时间，返回 HH:mm:ss字符串

[java]


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.将20101125102503转换成2010-11-25 10:25:03输出

[java]


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);

}

}