java利用正则表达式如何实现查找字符串

package hello;import java.util.regex.Matcher;import java.util.regex.Pattern;public class Hello {  public static void main(String[] args) {    String re = "\\[([^\\]]+)\\]";    String str = "[您好]，abcdefg，[abc]";    Pattern p = Pattern.compile(re);    Matcher m = p.matcher(str);    while(m.find()){    System.out.println(m.group(1));    }  }}