java访问数据库的问题请教

Question

1.
public Object getData(ResultSet rs)throws  SQLException{
    if(!rs.next()) return null;
    article.setArticleID(rs.getInt("articleID"));
    article.setAuthor(rs.getString("author"));
    article.setBoardID(rs.getInt("boardID"));
    article.setContent(rs.getString("content"));
    article.setPostTime(rs.getString("postTime"));
    article.setTitle(rs.getString("title"));
    article.setVisitNumber(rs.getInt("visitNumber"));
    article.setRenumber(rs.getInt("reNumber"));
    
    list.add(article);//---------------!!
  }
  return list;//-------------------------!!2.