转自自己的博客 ：http://yuqingjiang.com/portfolio/?q=zh-hans/node/11

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扯淡之前先放官方解释：

https://drupal.org/node/180528

然后是Drupal China的解释。

懒得翻译了 （我错了 有时间会翻译的）

直接解释案例吧。。因为之前写的是公司代码 不方便放出，直接用官网代码了

function batch_example($options1, $options2, $options3, $options4) { $batch = array(
    'operations' => array(
      array('batch_example_process', array($options1, $options2)),
      array('batch_example_process', array($options3, $options4)),
      ),
    'finished' => 'batch_example_finished',
    'title' => t('Processing Example Batch'),
    'init_message' => t('Example Batch is starting.'),
    'progress_message' => t('Processed @current out of @total.'),
    'error_message' => t('Example Batch has encountered an error.'),
    'file' => drupal_get_path('module', 'batch_example') . '/batch_example.inc',
  );
  batch_set($batch);
  batch_process('node/1');
}
function batch_example_process($options1, $options2, &$context) {
  if (!isset($context['sandbox']['progress'])) {
    $context['sandbox']['progress'] = 0;
    $context['sandbox']['current_node'] = 0;
    $context['sandbox']['max'] = db_query('SELECT COUNT(DISTINCT nid) FROM {node}')->fetchField();
  }
 
  $limit = 5;
 
  $result = db_query_range("SELECT nid FROM {node} WHERE nid > %d ORDER BY nid ASC", $context['sandbox']['current_node'], 0, $limit);
  while ($row = db_fetch_array($result)) {
 
    $node = node_load($row['nid'], NULL, TRUE);
    $node->value1 = $options1;
    $node->value2 = $options2;
    node_save($node);
 
    // Store some result for post-processing in the finished callback.
    $context['results'][] = check_plain($node->title);
 
    $context['sandbox']['progress']++;
    $context['sandbox']['current_node'] = $node->nid;
    $context['message'] = t('Now processing %node', array('%node' => $node->title));
  }
 
  if ($context['sandbox']['progress'] != $context['sandbox']['max']) {
    $context['finished'] = $context['sandbox']['progress'] / $context['sandbox']['max'];
  }
}
function batch_example_finished($success, $results, $operations) {
  if ($success) {
    $message = count($results) .' processed.';
    $message .= theme('item_list', $results);  
    drupal_set_message($message);
  }
  else {
    $error_operation = reset($operations);
    $message = t('An error occurred while processing %error_operation with arguments: @arguments', array('%error_operation' => $error_operation[0], '@arguments' => print_r($error_operation[1], TRUE)));
    drupal_set_message($message, 'error');
  }
}