如何反求逆一个正则表达式

Question

我使用Java正则表达式。我有一个字符串如下

String s = "the location is at {emp.address.street} with the name {emp.name},{emp.surname}";

对于上述字符串，s.replaceAll( "\{(.*?)\}", "" )返回以下字符串:

the location is at with the name ,

现在我想反过来得到以下结果:

{emp.address.street}{emp.name}{emp.surname}

Answer 1

经过测试的脚本适合我:

public class TEST
{
    public static void main( String[] args )
    {
        String s = "the location is at {emp.address.street} with the name {emp.name},{emp.surname}";
        String result = s.replaceAll( "[^{}]+|(\{(.*?)\})", "$1" );
        System.out.println(result);
    }
}

Answer 2

您可以创建Pattern并使用Matcher.find()和Matcher.group()来获取该模式的部分内容。下面是类的javadoc: Matcher javadoc Pattern javadoc