首先加载Jsoup库：
第一步：下载Jsoup 库下载地址
（学习视频分享：java教学视频）
下载核心库即可
第二步：
在项目下面新建文件夹命名如下，将下载好的 jar 包拖动到该文件中
第三步：
右键 jar 包选择 Build Path——>Add to…
若在 Referenced Libraries出现 相对应的 jar 包，则加载成功
实现效果：
实现代码：
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);}}}相关推荐：java入门教程
以上就是java利用Jsoup库爬取天气的知识。速戳>>知识兔学习精品课！