正则表达式去除前后

Question

//如何用 正则表达式 去除下面这个字符串的前后的','号
String s=",,,a,bc,,";
//期望的返回结果是"a,bc"

Answer 1

String s=",,,a,bc,,";
System.out.println(s.replaceAll("(^,*)|(,*$)", ""));

Answer 2

谁写个 pattern，macher的 我写了一下 没写 出来

Answer 3

import java.util.regex.*;
public class Test1
{
public static void main(String[] args){
boolean b = Pattern.matches("[,]*?\\p{ASCII}++",",,,A,BC");
System.out.println(b);
}
}

Answer 4

String s = ",,,a,bc,,";
String s2 = s.replaceAll("^(,*)(.*?)(,*)$", "$2");
System.out.println(s2);输出结果：a,bc