java逗号分隔的字符串(双引号)转化为逗号分隔的字符(单引号)

public static void main(String[] args) {
        String staffNums = "P208647,PWANO01,PWANO02";
        staffNums = staffNums.replaceAll("\\b", "'");
        System.out.println("转化后："+staffNums);
    }