求一个正则,元素嵌套类的

Question

假设有
 String s = "{AAAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':1111,FFFFFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDDDDDDDDD},{AAAAAAAAAAAAAAAAAAAAAAA,'KEY':22222,FFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDHHDDDDD},{AAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':3,FFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDFFDDDD}";现在想把这个字符串分割成3份,分别是string s1 = "{AAAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':1111,FFFFFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDDDDDDDDD}";
string s2 = "{AAAAAAAAAAAAAAAAAAAAAAA,'KEY':22222,FFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDHHDDDDD}";
string s2 = "{AAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':3,FFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDFFDDDD}";
规则就是每个最外围的{}内必须都有个一个'KEY':\d+的字符串用{.*?'KEY':\d+.*?}来匹配得出的结果是string s1 = "{AAAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':1111,FFFFFFFFFFFFFFFFFF{CCCCCC:XXXXX}";
string s2 = "{AAAAAAAAAAAAAAAAAAAAAAA,'KEY':22222,FFFFFFFFFFFFFFF{CCCCCC:XXXXX}";
string s2 = "{AAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':3,FFFFFFFFFFFFFF{CCCCCC:XXXXX}";不是我想要的结果.分析下,关键就是字符串中也有}这个符号,但是这个}前面必然有个{和他匹配,现在就是怎么排除里面的这对{}

Answer 1

private static void TestRegex22()
{
    String s = "{AAAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':1111,FFFFFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDDDDDDDDD},{AAAAAAAAAAAAAAAAAAAAAAA,'KEY':22222,FFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDHHDDDDD},{AAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':3,FFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDFFDDDD}";
    MatchCollection mc = Regex.Matches(s, @"\{[^}]*'KEY'[^}]*\}");
    foreach (Match m in mc)
    {
        Console.WriteLine(m.Value);
    }
}

Answer 2

没仔细看你要求，嵌套。忽略上面的，这样写。
private static void TestRegex22()
{
    String s = "{AAAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':1111,FFFFFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDDDDDDDDD},{AAAAAAAAAAAAAAAAAAAAAAA,'KEY':22222,FFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDHHDDDDD},{AAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':3,FFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDFFDDDD}";
    MatchCollection mc = Regex.Matches(s, @"{((?<o>\{)|(?<-o>\})|[^{}])+(?(o)(?!))}");
    List<string> lines = new List<string>();
    foreach (Match m in mc)
    {
        lines.Add(m.Value);
        Console.WriteLine(m.Value);
    }
    //lines就是你需要的结果
}

Answer 3

输出结果：
{AAAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':1111,FFFFFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDDDDDDDDD}
{AAAAAAAAAAAAAAAAAAAAAAA,'KEY':22222,FFFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDHHDDDDD}
{AAAAAAAAAAAAAAAAAAAAAAAAAA,'KEY':3,FFFFFFFFFFFFFF{CCCCCC:XXXXX},DDDDDDDDFFDDDD}如果还有问题，跟帖，贴出范例。这个帖子提问的相当好。描述清晰，例子很好。

Answer 4

网上找了点资料,优化后的@"{(?>[^{}]+|{(?<o>)|}(?<-o>))*(?(o)(?!))}"
参考了http://blog.csdn.net/lxcnn/archive/2009/08/03/4402808.aspx