java字符串和时间转换

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); 
  } 
} 

　　

//字符串转换成时间
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); 
} 

　　

//取得当前系统时间，返回yyyy-MM-dd HH:mm:ss字符串
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); 
  } 
} 

　　

//取得当前系统时间，返回 HH:mm:ss字符串
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); 
  } 
} 

　　

//将20101125102503转换成2010-11-25 10:25:03输出
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); 
  } 
}