从java.util.List <SomeType>获取类

List<SomeType> list = new ArrayList<SomeType>();
Type type = list.getClass().getGenericSuperclass();
if (type instanceof ParameterizedType) {
    ParameterizedType parameterizedType = (ParameterizedType) type;
    Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
    if (actualTypeArguments != null && actualTypeArguments.length > 0) {
        String className = actualTypeArguments[0].getTypeName();
        System.out.println("类名: " + className);
    }
}