Java Regex-分割逗号分隔的列表，但排除括号内的逗号 [英] Java Regex - split comma separated list, but exclude commas within parentheses

问题描述

我正在尝试编写正则表达式，它将像这样拆分Java字符串：

I'm trying to write regex that will split a Java string like this:

300x250,468x60,300x400v(480x320,768x1024,100x100),400x300v,640x480v(200x200,728x90)

/ p>

in to something like this:

300x250 
468x60
300x400v(480x320,768x1024,100x100)
400x300v
640x480v(200x200,728x90)

我一直在尝试 \，（ ）（）？，但是最后还要在括号中选择逗号。

I've been trying \,(\()? but this ends up selecting the commas in the parentheses as well.

任何帮助表示感谢！

推荐答案

如果必须使用正则表达式，可以在，（？！[^（] * \\））上拆分

If you have to use regex you can split on ,(?![^(]*\\))

如果没有，那么一个简单的字符迭代就可以解决问题

If not then one simple iteration over characters can do the trick

String data="300x250,468x60,300x400v(480x320,768x1024,100x100),400x300v,640x480v(200x200,728x90)";

List<String> tokens=new ArrayList<>();
StringBuilder buffer=new StringBuilder();

int parenthesesCounter=0;

for (char c : data.toCharArray()){
    if (c=='(') parenthesesCounter++;
    if (c==')') parenthesesCounter--;
    if (c==',' && parenthesesCounter==0){
        //lets add token inside buffer to our tokens
        tokens.add(buffer.toString());
        //now we need to clear buffer  
        buffer.delete(0, buffer.length());
    }
    else 
        buffer.append(c);
}
//lets not forget about part after last comma
tokens.add(buffer.toString());

String[] splitedArray=tokens.toArray(new String[tokens.size()]);

//lets test what is inside our array
for (String s : splitedArray)
    System.out.println(s);

输出

300x250
468x60
300x400v(480x320,768x1024,100x100)
400x300v
640x480v(200x200,728x90)

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