### 第1关 ： 利用Jsoup抓取携程旅游网的数据
```
public Document getHtml1(String url) throws IOException{
Document document = Jsoup.parse( new File( "./backups/www.ctrip.com.txt" ) , "utf-8" );
// System.out.println(document.title());
// System.out.println(document);
return document;
}
/**
*
* @param url 网址http://hotels.ctrip.com/domestic-city-hotel.html
* @return
* @throws IOException
*/
public Document getHtml2(String url) throws IOException{
Document document = Jsoup.parse( new File( "./backups/hotels.ctrip.com_domestic-city-hotel.txt" ) , "utf-8" );
//System.out.println(document.title());
return document;
}
}
```
### 第2关：解析并提取HTML 元素(一）
```
public Document getDoc1(String url) throws IOException{
File file=new File("./backups/www.ctrip.com.txt");
Document document =Jsoup.parse(file,"UTF-8","http://www.ctrip.com/");
return document ;
}
//获取“http://you.ctrip.com/”的Docment对象
public Document getDoc2(String url) throws IOException{
File file=new File("./backups/you.ctrip.com.txt");
Document document =Jsoup.parse(file,"UTF-8","http://you.ctrip.com");
return document ;
}
//获取所有链接
public Elements getLinks(Document doc){
Elements links=doc.select("link[href]");
return links;
}
//获取第一个class为“pop_attention”的div
public Element getDiv(Document doc){
Element element =doc.select("div.pop_attention").first();
return element ;
}
//获取所有li之后的i标签
public Elements getI(Document doc){
Elements element =doc.select("li>i");
return element ;
}
```
### 第3关：解析并提取HTML 元素(二）
```
//获取“http://hotels.ctrip.com/”Docment对象
public Document getDoc1(String url) throws IOException{
File file=new File("./backups/hotel.ctrip.com.txt");
Document doc=Jsoup.parse(file,"UTF-8","http://hotels.ctrip.com/");
return doc;
}
//获取“http://hotels.ctrip.com/domestic-city-hotel.html”的Docment对象
public Document getDoc2(String url) throws IOException{
File file1=new File("./backups/hotels.ctrip.com_domestic-city-hotel.txt");
Document doc=Jsoup.parse(file1,"UTF-8","http://hotels.ctrip.com/domestic-city-hotel.html");
return doc;
}
//获取所有链接
public List<String> getLinks(Document doc){
List<String> ar=new ArrayList<>();
Elements kk=doc.select("a[href]");
for(Element gg:kk){
ar.add(gg.tagName()+"$"+gg.attr("abs:href")+"("+gg.text()+")");
}
return ar;
}
//获取图片
public List<String> getMedia(Document doc){
List<String> list=new ArrayList<>();
Elements ll=doc.select("[src]");
for(Element h:ll){
if(h.tagName().equals("img")){
list.add(h.tagName()+"$"+h.attr("abs:src"));
}
}
return list;
}
//获取link[href]链接
public List<String> getImports(Document doc){
List<String> list=new ArrayList<>();
Elements kk=doc.select("link[href]");
for(Element g:kk){
list.add(g.tagName()+"$"+g.attr("abs:href")+"("+g.attr("rel")+")");
}
return list;
}
}
```
#### 第4关：使用Jsoup抓取携程旅游网全国城市信息
```
public Document getDoc(String url) throws IOException{
File file=new File("backups/hotels.ctrip.com_domestic-city-hotel.txt");
Document doc=Jsoup.parse(file,"UTF-8","http://hotels.ctrip.com/");
return doc;
}
/**
* 获取所有城市返回城市信息集合
* @param doc
* @return
*/
public List<HotelCity> getAllCitys(Document doc){
List<HotelCity> cities = new ArrayList<HotelCity>();
Elements aa= doc.getElementsByClass("pinyin_filter_detail layoutfix");
Element pp = aa.first();
Elements hh= pp.getElementsByTag("dd");
Elements hts=pp.getElementsByTag("dt");
for (int i = 0; i < hh.size(); i++) {
Element bb = hts.get(i);
Element head_hotelsLink = hh.get(i);
Elements links = head_hotelsLink.children();
for (Element link : links) {
String pinyin_cityId = link.attr("href").replace("/hotel/", "");
String pinyin = pinyin_cityId.replace(StringUtil.getNumbers(link.attr("href")), "");//截取拼音
HotelCity city = new HotelCity();
city.setCityId(StringUtil.getNumbers(link.attr("href"))); //截取cityId
city.setCityName(link.text());
city.setHeadPinyin(bb.text());
city.setPinyin(pinyin);
cities.add(city);
}
}
return cities;
}
```
