Java verwendet die Jsoup-Bibliothek, um das Wetter zu crawlen

import java.io.IOException; import java.net.URL; import java.util.Scanner; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; public class dataGet { private static Scanner in; public static void main(String[] args) throws IOException { in = new Scanner(System.in); System.out.println("请输入想要查询的省会城市天气："); String City = in.nextLine(); Wea(City);// 省会城市未来七天天气 } public static void Wea(String City) throws IOException { String[] Cities = { "兰州", "101160101", "西宁", "101150101", "西安", "101110101", "郑州", "101180101", "济南", "101120101", "太原", "101100101", "合肥", "101220101", "长沙", "101250101", "武汉", "101200101", "南京", "101190101", "贵阳", "101260101", "成都", "101270101", "昆明", "101290101", "台北", "101340101", "长春", "101060101", "沈阳", "101070101", "福州", "101230101", "杭州", "101210101", "南昌", "101240101", "广州", "101280101", "海口", "101310101", "哈尔滨", "101050101", "石家庄", "101090101", };//对应城市编码，参照 中国天气网 Boolean tem=false;//判断是否为省会城市 String keyword = new String(); for (int i = 0; i < 46; i += 2) { if (Cities[i].equals(City)) { keyword = Cities[i + 1]; tem=true; break; } } if (!tem) { System.out.println("查无此城！"); return; } String url = "http://www.weather.com.cn/weather/" + keyword + ".shtml"; Document document = Jsoup.parse(new URL(url), 3000); // 天气获取 Element element = document.getElementById("7d"); Elements elements = element.getElementsByTag("li"); for (Element el : elements) { Elements date = el.getElementsByTag("h1"); String Date = City + "：" + date; String weather = el.getElementsByClass("wea").eq(0).text(); String temperature = el.getElementsByClass("tem").eq(0).text(); String Weather = Date + weather + temperature; if (Weather.length() > 5) System.out.println(Weather); } } }