提取java中两个特殊字符之间的字符串部分

我希望在两个特殊字符（如

| | anystring | |

）之间有额外的字符串，但它不起作用。我尝试使用Java的模式匹配器，但它不起作用-它返回一个空数组

我试着跟随

---

之所以发生这种情况，是因为

\

字符在正则表达式中有特殊含义，所以必须使用

\

字符对其进行转义。请参阅上的演示

此外，在Java中，必须使用双反斜杠

\\

转义此字符

Pattern pattern = Pattern.compile("||(.*?)||");

---

您需要退出

|

Pattern pattern = Pattern.compile("\\|\\|(.*?)\\|\\|");

结果:

String stringToSearch = "About ||PrimarySchool|| %  of children in ||Country|| attend primary school. ||SecondarySchoolFemale|| % of girls and ||SecondarySchoolMale|| % of boys finish secondary school. Literacy is ||LiteracyFemale|| % for females and ||LiteracyMale|| % for males.";
Pattern pattern = Pattern.compile("\\|\\|([^|]*)\\|\\|");
Matcher matcher = pattern.matcher(stringToSearch);
while (matcher.find()) {
    System.out.println(matcher.group(1));
}

String stringToSearch = "About ||PrimarySchool|| %  of children in ||Country|| attend primary school. ||SecondarySchoolFemale|| % of girls and ||SecondarySchoolMale|| % of boys finish secondary school. Literacy is ||LiteracyFemale|| % for females and ||LiteracyMale|| % for males.";
Pattern pattern = Pattern.compile("\\|\\|([^|]*)\\|\\|");
Matcher matcher = pattern.matcher(stringToSearch);
while (matcher.find()) {
    System.out.println(matcher.group(1));
}

PrimarySchool
Country
SecondarySchoolFemale
SecondarySchoolMale
LiteracyFemale
LiteracyMale