如何以这种格式编写java模式:任意字符(int，int) (int，int)数字数字(int，int，int)

Question

例如

Maze0.bmp (0,0) (319,239) 65 120
Maze0.bmp (0,0) (319,239) 65 120 (254,243,90)  
Maze0.bmp (0,0) (319,239) 65 120 (254,243,90) (0,0,0)
Maze0.bmp (0,0) (319,239) 65 120 (254,243,90) (0,0,0) (11,33,44)

我想要得到maze0.bmp和所有的数字。我有：

Pattern pattern = Pattern.compile("([A-z][^\\s]*)\\s+\\((\\d+),(\\d+)\\)\\s+\\((\\d+),(\\d+)\\)\\s+(\\d+)\\s+(\\d+)\\s+(\\((\\d+),(\\d+),(\\d+)\\)\\s*)"); 
BufferedReader stdin = new BufferedReader(new InputStreamReader( System.in));
String input;
Matcher matcher = null; 
boolean isMatched = false; 
while (!isMatched) {
    System.out.println("Please enter right format\n");
    input = stdin.readLine(); 
    matcher = pattern.matcher(input); 
    while(matcher.find()) {
        isMatched = true; 
        for (int i = 1; i <= matcher.groupCount(); ++i) 
            System.out.println(matcher.group(i));
    }
}

但这是正确的。例如，如果我的输入是

Maze0.bmp (0,0) (319,239) 65 120 (254,243,90) (0,0,0)

它无法获取最后一个元组( 0,0,0)。

Answer 1

这是我能想到的最好的办法了。请注意，我使用了两种模式，因为出于某种原因，Java拒绝捕获重复组(如果有人碰巧知道原因，请留言)。

final Pattern outerPattern = Pattern.compile("(.*?) \\((\\d+),(\\d+)\\) \\((\\d+),(\\d+)\\) (\\d+) (\\d+)(.*)");
final Pattern optionalTouplePattern = Pattern.compile(" \\((\\d+),(\\d+),(\\d+)\\)");

final BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
boolean isMatched;

do
{
    System.out.println("Please enter right format:");
    Matcher m = outerPattern.matcher(stdin.readLine());
    if (isMatched = m.find())
    {
        System.out.println(String.format("name='%s', first touple: [%s,%s], second touple: [%s,%s], first single number: %s, second single number: %s", m.group(1), m.group(2), m.group(3), m.group(4), m.group(5), m.group(6), m.group(7)));
        m = optionalTouplePattern.matcher(m.group(8));
        while(m.find())
        {
            System.out.println(String.format("+ optional touple: [%s,%s,%s]", m.group(1), m.group(2), m.group(3)));
        }
    }
}while(!isMatched);

Answer 2

好的，对不起，我得复习一下。java匹配器似乎不喜欢模式计数，它无法在正则表达式的编译时确定。但这是有效的(经过测试)：

Matcher m = Pattern.compile("\\((\\d+),(\\d+),(\\d+)\\)").matcher("(23,56,78) (54,22,11)");
while(m.find())
{
  for(int i = 1; i <= m.groupCount(); ++i)
  System.out.println(m.group(i));
}

Answer 3

我不知道java中匹配的上下文，但我非常了解regex。尝试此上下文：

while matching BITMAP records is not done
  ("
     ([A-z][^\s])            'maze.bmp'   ~ group 1
     \s+
     \(  (\d+),(\d+)  \)     '0' '0'      ~ group 2,3
     \s+
     \( (\d+),(\d+) \)       '319'  '239' ~ group 4,5
     \s+
     (\d+)                   '65'         ~ group 6
     \s+
     (\d+)                   '120'        ~ group 7
     \s+
     (
       (?: \( \d+,\d+,\d+ \) \s+ )+       '(254,243,90) (0,0,0) '     ~ group 8
     )
  ") - context = global
{
      // save to BITMAP.array (groups 1 - 7)
      copy group 8 to variable '(254,243,90) (0,0,0) '
      new matching of TUPLES, group 8 is the regex subject for this new match
         ("
            (\d+)
         ") - context = global

      append TUPLES.array (254 243 90 0 0 0)
      to BITMAP.array (maze.bmp 0 0 319 239 65 120 <append> 254 243 90 0 0 0)

     // do next BITMAP record
}