(\[\w+\])|(\<i\>\w+\<\/i\>)

------解决方案--------------------
Java code
String s = "abcdef[wx]hijk<i>aaa</i>lmn[fn]opq<i>bbbb</i>rst";
        String px = "[a-z]*(\\[[a-z]*\\])[a-z]*(<i>[a-z]*</i>)";
        Pattern p = Pattern.compile(px);
        Matcher m = p.matcher(s);
        while (m.find()) {
            System.out.println(m.group(1));
            System.out.println(m.group(2));
        }

------解决方案--------------------
Java code

String scontent="abcdef[wx]hijk<i>aaa</i>lmn[fn]opq<i>bbbb</i>rst";
        String rex = "(\\[\\w+\\])|(\\<i\\>\\w+\\<\\/i\\>)";
        Pattern p = Pattern.compile(rex);
        Matcher m = p.matcher(scontent);
        while(m.find()){
            System.out.println(m.group());
        }

------解决方案--------------------
System.out.println(m.group()+m.start());起始值索引

------解决方案--------------------
for example

Java code
String s = "abcdef[wx]hijk<i>aaa</i>lmn[fn]opq<i>bbbb</i>rst";
Pattern p = Pattern.compile("\\[\\w+\\]|(?i)<i\\s*>.*?</i>");
Matcher m = p.matcher(s);
while (m.find()) {
    System.out.println(m.group());
}

------解决方案--------------------
Java code

      String s = "abcdef[wx]hijk<i>aaa</i>lmn[fn]opq<i>bbbb</i>rst";
      Pattern p = Pattern.compile("\\[\\w+\\]|(<i>\\w+</i>)");
      Matcher m = p.matcher(s);

      while(m.find()) {
         System.err.println("index = " + m.start() + ", string = " + m.group());
      }

------解决方案--------------------
探讨

Java code

      String s = "abcdef[wx]hijk<i>aaa</i>lmn[fn]opq<i>bbbb</i>rst";
      Pattern p = Pattern.compile("\\[\\w+\\]|(<i>\\w+</i>)");
      Matcher m = p.matcher(s);

      while(m.find……


------解决方案--------------------
Java code
String str="abcdef[wx]hijk<i>aaa</i>lmn[fn]opq<i>bbbb</i>rst";
        Pattern pat=Pattern.compile("(?:\\[.*?\\]|<(.*?)>[^<]+</\\1>)");
        Matcher mcr=pat.matcher(str);
        while(mcr.find()){
            System.out.println(mcr.start()+"    "+mcr.group()+"  "+mcr.end());
        }