实战二：网络爬虫

1.制造假数据

获取姓氏网址：百家姓_诗词_百度汉语

获取男生名字：男生有诗意的名字推荐（龙年男孩起名）

获取女生名字：2024年清新有诗意女孩名字取名（龙年女孩名字）

public class test1 {
    public static void main(String[] args) throws IOException {
        //1.定义变量记录网址
        String familyName = "https://hanyu.baidu.com/shici/detail?pid=0b2f26d4c0ddb3ee693fdb1137ee1b0d&from=kg0";
        String boyName = "http://www.haoming8.cn/baobao/10881.html";
        String girlName = "http://www.haoming8.cn/baobao/7641.html";
        //2.爬取数据,把网址上所有的数据拼接成一个字符串
        String FamilyName = webCrawler(familyName);
        String BoyName = webCrawler(boyName);
        String GirlName = webCrawler(girlName);
        //System.out.println(FamilyName);
        ArrayList FamilyNameList = getData(FamilyName, "([\\u4e00-\\u9fa5]{4})(，|。)", 1);
        ArrayList boyNameList = getData(BoyName, "([\\u4e00-\\u9fa5]{2})(、|。)", 1);
        ArrayList girlNameList = getData(GirlName,"([\\u4e00-\\u9fa5]{2})( )", 1);
        System.out.println(FamilyNameList);
        System.out.println(boyNameList);
        System.out.println(girlNameList);
    }

    private static ArrayList getData(String str, String regex, int index) {
        //1.创建集合存放数据
        ArrayList list = new ArrayList<>();
        //2.按照正则表达式的规则，去获取数据
        Pattern pattern = Pattern.compile(regex);
        //按照pattern的规则，到str当中获取数据
        Matcher matcher = pattern.matcher(str);
        while(matcher.find()){
            list.add(matcher.group(index));
        }
        return list;
    }

    public static String webCrawler(String net) throws IOException {
        StringBuilder sb = new StringBuilder();
        //创建一个url对象
        URL url = new URL(net);
        URLConnection conn = url.openConnection();
        InputStreamReader isr = new InputStreamReader(conn.getInputStream());
        int ch;
        while ((ch = isr.read()) != -1) {
            sb.append((char) ch);
        }
        isr.close();
        return sb.toString();
    }
}