​

 java实现定时获取百度/微博/头条/知乎热榜数据，做一个热榜数据榜单。

目录

一、效果展示

二、热搜榜单

三、 程序代码

一、效果展示

效果预览地址：https://www.ewbang.com/community/news.html

二、热搜榜单

百度热搜榜单：https://top.baidu.com/board?tab=realtime

微博热搜榜单：https://weibo.com/ajax/side/hotSearch

头条热搜榜单：https://www.toutiao.com/hot-event/hot-board/?origin=toutiao_pc

知乎热搜榜单：https://www.zhihu.com/api/v3/feed/topstory/hot-lists/total?limit=50&desktop=true

三、 程序代码

package com.ruoyi.cms.task;

import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.ruoyi.cms.constant.RedisKeys;
import com.ruoyi.cms.domain.News;
import com.ruoyi.common.core.redis.RedisCache;
import com.xkcoding.http.HttpUtil;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Component("news")
public class NewsTask {

    @Autowired
    private RedisCache redisCache;

    /**
     * 条数限制
     */
    private final static int maxLimitCount = 15;

    /**
     * 榜单任务
     */
    public void task() {
        baidu();
        weibo();
        toutiao();
        zhihu();
    }

    /**
     * 百度热搜
     */
    public void baidu() {
        String baiduUrl = "https://top.baidu.com/board?tab=realtime";
        String baiduHtml = HttpUtil.get(baiduUrl);
        Document doc = Jsoup.parse(baiduHtml);
        Elements ul = doc.select(".content_1YWBm");
        List<News> list = new ArrayList<>();
        for (Element li : ul) {
            String url = li.select("a").attr("href");
            String title = li.select(".c-single-text-ellipsis").text();
            News news = new News();
            news.setTitle(title);
            news.setUrl(url);
            list.add(news);
        }
        List<News> collect = list.stream().limit(maxLimitCount).collect(Collectors.toList());
        redisCache.deleteObject(RedisKeys.hot_search + "baidu");
        redisCache.setCacheList(RedisKeys.hot_search + "baidu", collect);
    }

    /**
     * 微博热搜
     */
    public void weibo() {
        String weiboUrl = "https://weibo.com/ajax/side/hotSearch";
        String weiboJson = HttpUtil.get(weiboUrl);
        List<Map<String, String>> realtimeList = (List<Map<String, String>>) JSONUtil.getByPath(JSONUtil.parse(weiboJson), "data.realtime");
        List<News> list = new ArrayList<>();
        realtimeList.forEach(item -> {
            String title = item.get("word");
            String url = "https://s.weibo.com/weibo?q=%23" + title + "%23";
            News news = new News();
            news.setTitle(title);
            news.setUrl(url);
            list.add(news);
        });
        List<News> collect = list.stream().limit(maxLimitCount).collect(Collectors.toList());
        redisCache.deleteObject(RedisKeys.hot_search + "weibo");
        redisCache.setCacheList(RedisKeys.hot_search + "weibo", collect);
    }

    /**
     * 头条热搜
     */
    public void toutiao() {
        String toutiaoUrl = "https://www.toutiao.com/hot-event/hot-board/?origin=toutiao_pc";
        String toutiaoJson = HttpUtil.get(toutiaoUrl);
        List<Map<String, String>> data = (List<Map<String, String>>) JSONUtil.getByPath(JSONUtil.parse(toutiaoJson), "data");
        List<Map<String, String>> fixed_top_data = (List<Map<String, String>>) JSONUtil.getByPath(JSONUtil.parse(toutiaoJson), "fixed_top_data");
        data.add(0, fixed_top_data.get(0));
        List<News> list = new ArrayList<>();
        data.forEach(item -> {
            String title = item.get("Title");
            String url = item.get("Url");
            News news = new News();
            news.setTitle(title);
            news.setUrl(url);
            list.add(news);
        });
        List<News> collect = list.stream().limit(maxLimitCount).collect(Collectors.toList());
        redisCache.deleteObject(RedisKeys.hot_search + "toutiao");
        redisCache.setCacheList(RedisKeys.hot_search + "toutiao", collect);
    }

    /**
     * 知乎热搜
     */
    public void zhihu() {
        String zhihuUrl = "https://www.zhihu.com/api/v3/feed/topstory/hot-lists/total?limit=50&desktop=true";
        String zhihuJson = HttpUtil.get(zhihuUrl);
        List<Map<String, JSONObject>> data = (List<Map<String, JSONObject>>) JSONUtil.getByPath(JSONUtil.parse(zhihuJson), "data");
        List<News> list = new ArrayList<>();
        data.forEach(item -> {
            String title = (String) item.get("target").get("title");
            String cardId = String.valueOf(item.get("card_id")).split("_")[1];
            String url = "https://www.zhihu.com/question/" + cardId;
            News news = new News();
            news.setTitle(title);
            news.setUrl(url);
            list.add(news);
        });
        List<News> collect = list.stream().limit(maxLimitCount).collect(Collectors.toList());
        redisCache.deleteObject(RedisKeys.hot_search + "zhihu");
        redisCache.setCacheList(RedisKeys.hot_search + "zhihu", collect);
    }


}