最近工作要收集点酒店数据，就到携程上看了看，记录爬取过程去下

从网站地图上可以很容易发现这个页面

2.然后查看源码

发现所有需要的数据都在

3.我们获取一下dl 这个元素和其中的所有子元素

我们用jsoup的jar包来解析获取的html，官网https://jsoup.org/，有API和jar包

String result = HttpUtil.getInstance().httpGet(null, "http://hotels.ctrip.com/domestic-city-hotel.html");

Document root_document = Jsoup.parse(result);

Elements pinyin_filter_elements = root_document.getElementsByClass("pinyin_filter_detail layoutfix");

//包含所有城市的Element

Element pinyin_filter = pinyin_filter_elements.first();

4.我准备把获取的城市数据存储到mysql中，所以下面连接了本地mysql数据库

// 连接数据库

Connection conn = SqlDBUtils.getConnection();

StringBuilder create_table_sql = new StringBuilder();

create_table_sql.append("create table if not exists ctrip_hotel_city (id integer primary key auto_increment, city_id integer not null, city_name varchar(255) not null, head_pinyin varchar(80) not null, pinyin varchar(255) not null)");

PreparedStatement preparedStatement;

try {

//每次执行删除一下表，防止数据插入重复

preparedStatement = conn.prepareStatement("DROP TABLE IF EXISTS ctrip_hotel_city");

preparedStatement.execute();

// 创建ctrip_hotel_city表，存储城市数据

preparedStatement = conn.prepareStatement(create_table_sql.toString());

preparedStatement.execute();

} catch (SQLException e) {

e.printStackTrace();

}

5.获取dl下所有的dt和dd，并从中提取数据库表中所需要的字段，实现存储

//拼音首字符Elements

Elements pinyins = pinyin_filter.getElementsByTag("dt");

//所有dd的Elements

Elements hotelsLinks = pinyin_filter.getElementsByTag("dd");

6.数据提取

for (int i = 0; i < pinyins.size(); i++) {

Element head_pinyin = pinyins.get(i);

Element head_hotelsLink = hotelsLinks.get(i);

Elements links = head_hotelsLink.children();

for (Element link : links) {

String cityId = StringUtil.getNumbers(link.attr("href"));

String cityName = link.html();

String head_pinyin_str = head_pinyin.html();

String pinyin_cityId = link.attr("href").replace("/hotel/", "");

String pinyin = pinyin_cityId.replace(StringUtil.getNumbers(link.attr("href")), "");

StringBuffer insert_sql = new StringBuffer();

insert_sql.append("insert into ctrip_hotel_city (city_id, city_name, head_pinyin, pinyin) values (");

insert_sql.append(cityId);

insert_sql.append(", '" + cityName + "'");

insert_sql.append(", '" + head_pinyin_str + "'");

//此处注意汉语拼音中会有'，直接插入数据库会报错，要把一个'替换为两个''

insert_sql.append(", '" + pinyin.replace("'", "''") + "')");

try {

preparedStatement = conn.prepareStatement(insert_sql.toString());

preparedStatement.execute();

} catch (SQLException e) {

e.printStackTrace();

}

}

}

7.运行后查看mysql数据库ctrip_hotel_city表，如下

至此，酒店城市获取思路已介绍完毕，下面将介绍怎么用城市获取城市所有酒店的数据，

github源码地址 https://github.com/jianiuqi/CTripSpider