....
        Map<String, ClInterface> map = new HashMap<>();
        GetClassess gc = new GetClassess();
        try {
            List<Class> classes = gc.getClasses(Main.class.getClassLoader(), "parsers");
            for (Class c : classes) {
                String s = String.valueOf(c);
                if (s.substring(s.indexOf(".") + 1).matches("[A-Z]{3}"))
                    map.put(s.substring(s.indexOf(".") + 1), (ClInterface) c.getDeclaredConstructor().newInstance());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }


        for (String s : list1) {
            System.out.println(s);
            if (map.get(s.substring(0, 3)) != null)
                System.out.println(map.get(s.substring(0, 3)).getParse(s));
            System.out.println("-----");
        }
    }
....

public class GetClassess {
    public List<Class> getClasses(ClassLoader cl, String pack) throws Exception {

        String dottedPackage = pack.replaceAll("[/]", ".");
        List<Class> classes = new ArrayList<Class>();
        URL upackage = cl.getResource(pack);


//        DataInputStream dis = new DataInputStream((InputStream) upackage.getContent());
        BufferedReader dis
                = new BufferedReader(new InputStreamReader((InputStream) upackage.getContent()));
        String line = null;
        while ((line = dis.readLine()) != null) {
            if (line.endsWith(".class")) {
                classes.add(Class.forName(dottedPackage + "." + line.substring(0, line.lastIndexOf('.'))));
            }
        }
        return classes;
    }
}

swith(str.substring(0,3)){
    case "BGM":
        BGM bgm = new BGM();
        bgm.getParse(str);
        break;
}

UNH+KZ0004232+IFTMIN:D:97A:UN:OSJD'
BGM+722+A0123854+9'
DTM+143:201805291338:203'
TSR++0:::2+3'
CUX+1:KZT+7:KZT'