我在数据库中工作,我需要从网上检索几个信息。使用Jsoup阅读字体代码页,我想跳过前#5;" li"标签。我正在尝试这个,但它根本不起作用:
String letra=editText.getText().toString().toUpperCase();
String url="https://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:_"+letra;
try {
Document doc = Jsoup.connect(url).get();
Elements liTags=doc.select("li");
int c=0;
for(org.jsoup.nodes.Element ligtag : liTags ){
if(c<5) {
frase =liTags.text()+" \r\n";
tv9.setText(" ");
c++;
}
else
frase =liTags.text()+" \r\n";
tv9.setText(frase);
}
} catch (IOException e) {
e.printStackTrace();
}
提前致谢!
答案 0 :(得分:0)
您是否在调试器中查看了代码?我猜不是,因为它有几个严重的错误:
您在liTags
上进行循环,ligtag
包含当前元素,但您从不使用此元素。
else block
未被大括号括起,只有else
的第一个语句部分。
tv9.setText(frase);
行看起来对我不好。我不知道tv9是什么类型的,但我想setText方法不会将新输入连接到已经存在的,而是替换tv9对象的文本值。然而,这只是猜测。
这是一个使用一些CSS魔法来获取相关li标签的工作版本,而不是仅仅省略前5个li元素:
String letra="F";
String url="https://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:_"+letra;
try {
Document doc = Jsoup.connect(url).get();
Elements liTags = doc.select("li:has(b:matches(^"+letra+"))");
for(org.jsoup.nodes.Element liTag : liTags ){
String frase = liTag.text()+" \r\n";
System.out.print(frase);
}
} catch (IOException e) {
e.printStackTrace();
}
CSS选择器会选择所有li
标记,其中包含b
标记,其中包含以您想要的字母开头的文字。
回复评论的附录
对于字母&#34; A&#34;我得到以下输出:
AGAF (AFT) – Afutara Airport – Afutara
AGAR (RNA) – Ulawa Airport – Arona, Ulawa Island
AGAT (ATD) – Uru Harbour Airport – Atoifi, Malaita
AGBA (VEV) – Barakoma Airport – Barakoma
AGBT (BPF) – Batuna Airport – Batuna
AGEV (GEF) – Geva Airport – Geva
AGGA (AKS) – Auki Gwaunaru'u Airport – Auki
AGGB (BNY) – Bellona/Anua Airport – Bellona/Anua
AGGC (CHY) – Choiseul Bay Airport – Choiseul Bay, Taro Island
AGGD (MBU) – Mbambanakira Airport – Mbambanakira
AGGE (BAS) – Balalae Airport – Shortland Island
AGGF (FRE) – Fera/Maringe Airport – Fera Island, Santa Isabel Island
AGGG – Honiara FIR – Honiara, Guadalcanal
AGGH (HIR) – Honiara International Airport (formerly Henderson Field) – Honiara, Guadalcanal
AGGI – Babanakira Airport – Babanakira
AGGJ (AVU) – Avu Avu Airport – Avu Avu
AGGK (IRA) – Kirakira Airport – Kirakira
AGGL (SCZ) – Santa Cruz/Graciosa Bay/Luova Airport – Santa Cruz/Graciosa Bay/Luova, Santa Cruz Island
AGGM (MUA) – Munda Airport – Munda, New Georgia Island
AGGN (GZO) – Nusatupe Airport – Gizo Island
AGGO (MNY) – Mono Airport – Mono Island
AGGP (PRS) – Marau Sound Airport – Marau Sound
AGGQ (OTV) – Ontong Java Airport – Ontong Java
AGGR (RNL) – Rennell/Tingoa Airport – Rennell/Tingoa, Rennell Island
AGGS (EGM) – Seghe Airport – Seghe
AGGT (NNB) – Santa Ana Airport – Santa Ana
AGGU (RUS) – Marau Airport – Marau
AGGV (VAO) – Suavanao Airport – Suavanao
AGGY (XYA) – Yandina Airport – Yandina
AGIN – Isuna Heliport – Isuna
AGKG (KGE) – Kaghau Airport – Kaghau Island
AGKU (KUE) – Kukudu Airport – Kukudu
AGOK (GTA) – Gatokae Aerodrome – Gatokae
AGRC (RIN) – Ringi Cove Airport – Ringi Cove
AGRM (RBV) – Ramata Airport – Ramata Island
ANAU – Nauru Flight Information Region
ANYN (INU) – Nauru International Airport – Yaren
AYAA (AMF) – Ama Airport – Ama
AYBK (BUA) – Buka Airport – Buka
AYCH (CMU) – Chimbu Airport – Kundiawa
AYDU (DAU) – Daru Airport – Daru
AYGA (GKA) – Goroka Airport – Goroka
AYGN (GUR) – Gurney Airport – Alotau
AYGR (PNP) – Girua Airport – Popondetta
AYHK (HKN) – Hoskins Airport – Kimbe
AYIQ (KIE) – Kieta Aropa Airport – Kieta
AYKA (LSA) – Losuia Airport – Kiriwina
AYKI (UNG) – Kiunga Airport – Kiunga
AYKK (KRI) – Kikori Airport – Kikori
AYKM (KMA) – Kerema Airport – Kerema
AYKT (KZF) – Kaintiba Airport – Kaintiba
AYKV (KVG) – Kavieng Airport – Kavieng
AYKY – Kunaye Airport – Kunaye
AYLA – Lae Airfield – Lae
AYMD (MAG) – Madang Airport – Madang
AYMH (HGU) – Mount Hagen Airport – Mount Hagen
AYMN (MDU) – Mendi Airport – Mendi
AYMO (MAS) – Momote Airport – Manus Island
AYMR (MXH) – Moro Airport – Moro
AYMS (MIS) – Misima Island Airport – Misima
AYNZ (LAE) – Lae Nadzab Airport – Lae / Nadzab
AYPY (POM) – Port Moresby/Jackson International Airport – Port Moresby
AYRB – Rabaul Airport (old) (destroyed 1994) – Rabaul, New Britain
AYTA (TIZ) – Tari Airport – Tari
AYTB (TBG) – Tabubil Airport – Tabubil
AYTK (RAB) – Rabaul Airport (Tokua Airport) – Rabaul / Tokua
AYVN (VAI) – Vanimo Airport – Vanimo
AYWD (WBM) – Wapenamanda Airport – Wapenamanda
AYWK (WWK) – Wewak International Airport – Wewak
AYNZ和AYPY都是该名单的一部分。