你能否在运行时告诉你是否在jar中运行java？

public class CheckIfRunningInJar {
    public static void main(String[] args) {
        String classPath = System.getProperty("java.class.path");
        if (classPath.endsWith(".jar")) {
            System.out.println("Running in JAR file");
        } else {
            System.out.println("Not running in JAR file");
        }
    }
}