code: public int[] batch(String sql, Object[][] params) throws SQLException {
          return batch(sql, params, null);
      }
docs: Execute a batch of SQL INSERT, UPDATE, or DELETE queries.  The
  <code>Connection</code> is retrieved from the <code>DataSource</code>
  set in the constructor.  This <code>Connection</code> must be in
  auto-commit mode or the update will not be saved.
  
  @param sql The SQL to execute.
  @param params An array of query replacement parameters.  Each row in
  this array is one set of batch replacement values.
  @return The number of rows updated per statement.
  @throws java.sql.SQLException if a database access error occurs
  @since DbUtils 1.1