Batch change author on multiple Drupal contents. This is view export code. Requires views_bulk_operations module.

batch_change_content_author

$view = new view();
$view->name = 'batch_change_content_author';
$view->description = '';
$view->tag = 'default';
$view->base_table = 'node';
$view->human_name = 'Batch change content author';
$view->core = 7;
$view->api_version = '3.0';
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */

/* Display: Master */
$handler = $view->new_display('default', 'Master', 'default');
$handler->display->display_options['title'] = 'Batch change content author';
$handler->display->display_options['use_more_always'] = FALSE;
$handler->display->display_options['access']['type'] = 'perm';
$handler->display->display_options['cache']['type'] = 'none';
$handler->display->display_options['query']['type'] = 'views_query';
$handler->display->display_options['exposed_form']['type'] = 'basic';
$handler->display->display_options['pager']['type'] = 'full';
$handler->display->display_options['pager']['options']['items_per_page'] = '50';
$handler->display->display_options['style_plugin'] = 'table';
/* Relationship: Content: Author */
$handler->display->display_options['relationships']['uid']['id'] = 'uid';
$handler->display->display_options['relationships']['uid']['table'] = 'node';
$handler->display->display_options['relationships']['uid']['field'] = 'uid';
/* Field: Bulk operations: Content */
$handler->display->display_options['fields']['views_bulk_operations_1']['id'] = 'views_bulk_operations_1';
$handler->display->display_options['fields']['views_bulk_operations_1']['table'] = 'node';
$handler->display->display_options['fields']['views_bulk_operations_1']['field'] = 'views_bulk_operations';
$handler->display->display_options['fields']['views_bulk_operations_1']['label'] = '';
$handler->display->display_options['fields']['views_bulk_operations_1']['element_label_colon'] = FALSE;
$handler->display->display_options['fields']['views_bulk_operations_1']['vbo_settings']['display_type'] = '1';
$handler->display->display_options['fields']['views_bulk_operations_1']['vbo_settings']['enable_select_all_pages'] = 1;
$handler->display->display_options['fields']['views_bulk_operations_1']['vbo_settings']['force_single'] = 0;
$handler->display->display_options['fields']['views_bulk_operations_1']['vbo_settings']['entity_load_capacity'] = '10';
$handler->display->display_options['fields']['views_bulk_operations_1']['vbo_operations'] = array(
  'action::node_assign_owner_action' => array(
    'selected' => 1,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::views_bulk_operations_delete_item' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::views_bulk_operations_delete_revision' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::views_bulk_operations_script_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::flag_node_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::node_make_sticky_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::node_make_unsticky_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::views_bulk_operations_modify_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
    'settings' => array(
      'show_all_tokens' => 1,
      'display_values' => array(
        '_all_' => '_all_',
      ),
    ),
  ),
  'action::views_bulk_operations_argument_selector_action' => array(
    'selected' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
    'settings' => array(
      'url' => '',
    ),
  ),
  'action::node_promote_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::node_publish_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::node_unpromote_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'rules_component::scheduler_remove_publish_date_component' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'rules_component::scheduler_remove_unpublish_date_component' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::node_save_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::system_send_email_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'rules_component::scheduler_set_publish_date_component' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'rules_component::scheduler_set_unpublish_date_component' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::node_unpublish_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::node_unpublish_by_keyword_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
  'action::pathauto_node_update_action' => array(
    'selected' => 0,
    'postpone_processing' => 0,
    'skip_confirmation' => 0,
    'override_label' => 0,
    'label' => '',
  ),
);
/* Field: Content: Title */
$handler->display->display_options['fields']['title']['id'] = 'title';
$handler->display->display_options['fields']['title']['table'] = 'node';
$handler->display->display_options['fields']['title']['field'] = 'title';
$handler->display->display_options['fields']['title']['alter']['word_boundary'] = FALSE;
$handler->display->display_options['fields']['title']['alter']['ellipsis'] = FALSE;
/* Field: User: Name */
$handler->display->display_options['fields']['name']['id'] = 'name';
$handler->display->display_options['fields']['name']['table'] = 'users';
$handler->display->display_options['fields']['name']['field'] = 'name';
$handler->display->display_options['fields']['name']['relationship'] = 'uid';
$handler->display->display_options['fields']['name']['label'] = 'Current author';
/* Sort criterion: Content: Post date */
$handler->display->display_options['sorts']['created']['id'] = 'created';
$handler->display->display_options['sorts']['created']['table'] = 'node';
$handler->display->display_options['sorts']['created']['field'] = 'created';
$handler->display->display_options['sorts']['created']['order'] = 'DESC';
/* Filter criterion: Content: Published */
$handler->display->display_options['filters']['status']['id'] = 'status';
$handler->display->display_options['filters']['status']['table'] = 'node';
$handler->display->display_options['filters']['status']['field'] = 'status';
$handler->display->display_options['filters']['status']['value'] = 1;
$handler->display->display_options['filters']['status']['group'] = 1;
$handler->display->display_options['filters']['status']['expose']['operator'] = FALSE;
/* Filter criterion: Content: Author uid */
$handler->display->display_options['filters']['uid']['id'] = 'uid';
$handler->display->display_options['filters']['uid']['table'] = 'node';
$handler->display->display_options['filters']['uid']['field'] = 'uid';
$handler->display->display_options['filters']['uid']['value'] = '';
$handler->display->display_options['filters']['uid']['exposed'] = TRUE;
$handler->display->display_options['filters']['uid']['expose']['operator_id'] = 'uid_op';
$handler->display->display_options['filters']['uid']['expose']['label'] = 'Filter by author';
$handler->display->display_options['filters']['uid']['expose']['operator'] = 'uid_op';
$handler->display->display_options['filters']['uid']['expose']['identifier'] = 'uid';
$handler->display->display_options['filters']['uid']['expose']['remember_roles'] = array(
  2 => '2',
  1 => 0,
  4 => 0,
  3 => 0,
  17 => 0,
  7 => 0,
  6 => 0,
  8 => 0,
  9 => 0,
  10 => 0,
  11 => 0,
  12 => 0,
  13 => 0,
  14 => 0,
  15 => 0,
  16 => 0,
);

/* Display: Page */
$handler = $view->new_display('page', 'Page', 'page');
$handler->display->display_options['path'] = 'admin/content/batch-change-author';
$handler->display->display_options['menu']['type'] = 'normal';
$handler->display->display_options['menu']['title'] = 'Batch change content author';
$handler->display->display_options['menu']['name'] = 'management';
$translatables['batch_change_content_author'] = array(
  t('Master'),
  t('Batch change content author'),
  t('more'),
  t('Apply'),
  t('Reset'),
  t('Sort by'),
  t('Asc'),
  t('Desc'),
  t('Items per page'),
  t('- All -'),
  t('Offset'),
  t('« first'),
  t('‹ previous'),
  t('next ›'),
  t('last »'),
  t('author'),
  t('- Choose an operation -'),
  t('Title'),
  t('Current author'),
  t('Filter by author'),
  t('Page'),
);