Date date = new Date (System.currentTimeMilisl) ; SimpleDateFormat simpleDateFormat = new SimpleDateFormat (“yyyy-MM-dd”) ; simpleDateFormat.format(date) ;
我知道replace 我要正则表达式
ublic class Test4{ public static void main(String[] args){ String str="3-2 2009-08-07"; String regex="([0-9]{4})-([0-9]{2})-([0-9]{2})"; System.out.println(str.replaceAll(regex,"$1"+"."+"$2"+"."+"$3")); } } F:\java>java Test4 3-2 2009.08.07
String.replaceAll(),用的就是Matcher.replaceAll()
public class Test4{ public static void main(String[] args){ String str="3.2 2009.08.07"; String regex="([0-9]{4})\\.([0-9]{2})\\.([0-9]{2})"; System.out.println(str.replaceAll(regex,"$1"+"-"+"$2"+"-"+"$3")); } } F:\java>java Test4 3.2 2009-08-07
String str = "2009.08.07";
str.replace('.','-');
SimpleDateFormat simpleDateFormat = new SimpleDateFormat (“yyyy-MM-dd”) ;
simpleDateFormat.format(date) ;
public static void main(String[] args){
String str="3-2 2009-08-07";
String regex="([0-9]{4})-([0-9]{2})-([0-9]{2})";
System.out.println(str.replaceAll(regex,"$1"+"."+"$2"+"."+"$3"));
}
}
F:\java>java Test4
3-2 2009.08.07
public static void main(String[] args){
String str="3.2 2009.08.07";
String regex="([0-9]{4})\\.([0-9]{2})\\.([0-9]{2})";
System.out.println(str.replaceAll(regex,"$1"+"-"+"$2"+"-"+"$3"));
}
}
F:\java>java Test4
3.2 2009-08-07