正则表达式划分CSV

《精通正则表达式》 第401页

public static List splitCSV(String txt) {

String reg = " \\G(?:^|,)(?:\"([^\"]*+(?:\"\"[^\"]*+)*+)\"|([^\",]*+))";

// 即 \G(?:^|,)(?:"([^"]*+(?:""[^"]*+)*+)"|([^",]*+))

Matcher matcherMain = Pattern.compile(reg).matcher("");

Matcher matcherQuoto = Pattern.compile(" \"\"").matcher("");

matcherMain.reset(txt);

System.out.println(matcherMain.groupCount());

List strList = new ArrayList();

while (matcherMain.find()) {

String field;

if (matcherMain.start(2) >= 0) {

field = matcherMain.group(2);

} else {

field = matcherQuoto.reset(matcherMain.group(1)).replaceAll("\"");

}

strList.add(field);

}

return strList;

}

//测试

public static void main(String[] args) {

String txt = " The Thousand,10000,2700,\"10,000\",\"It's \"\"10 Grand\"\",baby\",10K ";

//即 The Thousand,"10,000","It's ""10 Grand"",baby",10K

List splits = splitCSV(txt);

for (String s : splits) {

System.out.println(s);

}

}

打印：

2

The Thousand

10000

2700

10,000

It's "10 Grand",baby

10K

原文地址：https://www.jb51.cc/regex/361703.html