如何在启动脚本中获取jar的版本号并更新版本号？

import java.util.jar.JarFile;
import java.util.jar.Manifest;

public class GetJarVersion {
    public static void main(String[] args) {
        try {
            JarFile jarFile = new JarFile("your-jar-file.jar");
            Manifest manifest = jarFile.getManifest();
            String version = manifest.getMainAttributes().getValue("Implementation-Version");
            System.out.println("Jar Version: " + version);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

jar_version=$(java -cp your-jar-file.jar GetJarVersion)