import java.lang.reflect.Field;

public class ObjectCopyUtil {
    public static Object copyObj(Object obj) throws Exception {
        Class<?> classType = obj.getClass();//獲取class物件
        Object objRes = classType.newInstance();//構建目標物件
        for (Field field : classType.getDeclaredFields()) {
            field.setAccessible(true
 
);//設定可訪問許可權
            Object value = field.get(obj);//利用get方法取obj的值
            field.set(objRes, value);
        }
        return objRes;
    }
}

public class CopyClass {//反射覆制物件

    public static void main(String[] args) {
        // TODO Auto-generated method stub
Student s=new Student(123, "撒颯颯");
try
 
 {
    Student s2=(Student)ObjectCopyUtil.copyObj(s);
    System.out.println(s2.toString());
} catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
    }

}