import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ExtractMessage {
  public static void main(String[] args) {
    String msg = "PerformanceManager[第1個(gè)中括號(hào)]Product[第2個(gè)中括號(hào)]<[第3個(gè)中括號(hào)]79~";
    List<String> list = extractMessageByRegular(msg);
    for (int i = 0; i < list.size(); i++) {
      System.out.println(i+"-->"+list.get(i));
    }
  }
  /**
   * 使用正則表達(dá)式提取中括號(hào)中的內(nèi)容
   * @param msg
   * @return
   */
  public static List<String> extractMessageByRegular(String msg){
    List<String> list=new ArrayList<String>();
    Pattern p = Pattern.compile("(\\[[^\\]]*\\])");
    Matcher m = p.matcher(msg);
    while(m.find()){
      list.add(m.group().substring(1, m.group().length()-1));
    }
    return list;
  }
}

package com.perry.test;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ExtractMessage {
  public static void main(String[] args) {
    String msg = "PerformanceManager[第1個(gè)中括號(hào)]Product[第2個(gè)中括號(hào)[中括號(hào)中包含中括號(hào)]]<[第3個(gè)中括號(hào)]79~";
    List<String> list = extractMessage(msg);
    for (int i = 0; i < list.size(); i++) {
      System.out.println(i+"-->"+list.get(i));
    }
  }
  /**
   * 提取中括號(hào)中內(nèi)容，忽略中括號(hào)中的中括號(hào)
   * @param msg
   * @return
   */
  public static List<String> extractMessage(String msg) {
    List<String> list = new ArrayList<String>();
    int start = 0;
    int startFlag = 0;
    int endFlag = 0;
    for (int i = 0; i < msg.length(); i++) {
      if (msg.charAt(i) == '[') {
        startFlag++;
        if (startFlag == endFlag + 1) {
          start = i;
        }
      } else if (msg.charAt(i) == ']') {
        endFlag++;
        if (endFlag == startFlag) {
          list.add(msg.substring(start + 1, i));
        }
      }
    }
    return list;
  }
}