泛型实例化，参数实例化

    /**
     * 初始化
     * @param parameter 参数
     * @return 实例化的对象
     */
    protected H init(String parameter){
        Type superClass = getClass().getGenericSuperclass();
　　　　　　//获取第二个枚举对象
        Type type = ((ParameterizedType) superClass).getActualTypeArguments()[1];
        Class<?> clazz = getRawType(type);
        try {
　　　　　　　　//获取构造函数列表
            final Constructor<?>[] declaredConstructors = clazz.getDeclaredConstructors();
　　　　　　　　//获取构造函数参数，定义实例化对象的参数类型
            final Constructor<?> declaredConstructor = clazz.getDeclaredConstructor(declaredConstructors[0].getParameterTypes());
            declaredConstructor.setAccessible(true);
            return (H) declaredConstructor.newInstance(parameter, "qeqweqwew");
        } catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
            throw new ServiceException(e.getMessage(),e.getCause());
        }
    }

    /**
     * type不能直接实例化对象，通过type获取class的类型，然后实例化对象
     * @param type 类型
     * @return 对象
     */
    public static Class<?> getRawType(Type type) {
        if (type instanceof Class) {
            return (Class<?>) type;
        } else if (type instanceof ParameterizedType) {
            ParameterizedType parameterizedType = (ParameterizedType) type;
            Type rawType = parameterizedType.getRawType();
            return (Class<?>) rawType;
        } else if (type instanceof GenericArrayType) {
            Type componentType = ((GenericArrayType) type).getGenericComponentType();
            return Array.newInstance(getRawType(componentType), 0).getClass();
        } else if (type instanceof TypeVariable) {
            return Object.class;
        } else if (type instanceof WildcardType) {
            return getRawType(((WildcardType) type).getUpperBounds()[0]);
        } else {
            String className = type == null ? "null" : type.getClass().getName();
            throw new IllegalArgumentException("Expected a Class, ParameterizedType, or GenericArrayType, but <" + type + "> is of type " + className);
        }
    }

https://www.cnblogs.com/tiancai/p/9603050.html
https://www.cnblogs.com/duanweishi/p/4480163.html