java - 如何转义java中正则表达式模式中的特殊字符？

Question

我有一个字符串:

Patient:
${ss.patient.howard.firstName} ${ss.patient.howard.lastName}
Gender: ${ss.patient.howard.sex}
Birthdate: ${ss.patient.howard.dob}
${ss.patient.howard.addressLine1}
Phone: (801)546-4765

我正在尝试用其他字符串替换 ${..} 子字符串，使其看起来像:

Patient:
firstName lastName

Gender:sex
Birthdate: dob
addressLine1
Phone: (801)546-4765

Answer 1

您可以将此正则表达式与捕获组一起使用:

String myString = "Patient:\n${ss.patient.howard.firstName} ${ss.patient.howard.lastName}\nGender: ${ss.patient.howard.sex}\nBirthdate: ${ss.patient.howard.dob}\n${ss.patient.howard.addressLine1}\nPhone: (801)546-4765";
myString = myString.replaceAll("\\$\\{[^}]+?\\.([^.}]+)}", "$1");

System.err.println(myString);

([^.}]+) 是 } 之前和最后一个 DOT 之后的捕获组。

RegEx Demo

输出:

Patient:
firstName lastName
Gender: sex
Birthdate: dob
addressLine1
Phone: (801)546-4765