String a = "[1,2,3]";
String b = a.replaceAll("[\\[\\]]","");
System.out.println(b);// b=1,3 原文链接：https://www.f2er.com/regex/359080.html
String a = "[1,2,3]";
String b = a.replaceAll("[\\[\\]]","");
System.out.println(b);// b=1,3 原文链接：https://www.f2er.com/regex/359080.html