Java爬取网络博客文章

2018-09-14 15:42:23 浏览数 (1)

前言

近期本人在某云上购买了个人域名,本想着以后购买与服务器搭建自己的个人网站,由于需要筹备的太多,暂时先搁置了,想着先借用GitHub Pages搭建一个静态的站,搭建的过程其实也曲折,主要是域名地址配置把人搞废了,不过总的来说还算顺利,网站地址  https://chenchangyuan.cn(空博客,样式还挺漂亮的,后期会添砖加瓦)

利用git npm hexo,再在github中进行相应配置,网上教程很多,如果有疑问欢迎评论告知。

本人以前也是搞过几年java,由于公司的岗位职责,后面渐渐地被掰弯,现在主要是做前端开发。

所以想利用java爬取文章,再将爬取的html转化成md(目前还未实现,欢迎各位同学指导)。

1.获取个人博客所有url

查看博客地址https://www.cnblogs.com/ccylovehs/default.html?page=1

根据你自己写的博客数量进行遍历

将博客的详情页地址存放在set集合中,详情页地址https://cloud.tencent.com/developer/article/1339307

2.详情页url生成html文件

遍历set集合,依次生成html文件

文件存放在C://data//blog目录下,文件名由捕获组1生成

3.代码实现

代码语言:javascript复制
package com.blog.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author Jack Chen
 * */
public class BlogUtil {

    /**
     * URL_PAGE:cnblogs url
     * URL_PAGE_DETAIL:详情页url
     * PAGE_COUNT:页数
     * urlLists:所有详情页url Set集合(防止重复)
     * p:匹配模式
     * */
    public final static String URL_PAGE = "https://www.cnblogs.com/ccylovehs/default.html?page=";
    public final static String URL_PAGE_DETAIL = "https://www.cnblogs.com/ccylovehs/p/([0-9] .html)";
    public final static int PAGE_COUNT = 3;
    public static Set<String> urlLists = new TreeSet<String>();
    public final static Pattern p = Pattern.compile(URL_PAGE_DETAIL);
    
    
    public static void main(String[] args) throws Exception {
        for(int i = 1;i<=PAGE_COUNT;i  ) {
            getUrls(i);
        }
        for(Iterator<String> i = urlLists.iterator();i.hasNext();) {
            createFile(i.next());
        }
    }
    
    /**
     * @param url
     * @throws Exception
     */
    private static void createFile(String url) throws Exception {
        Matcher m = p.matcher(url);
        m.find();
        String fileName = m.group(1);
        String prefix = "C://data//blog//";
        File file = new File(prefix   fileName);
        PrintStream ps = new PrintStream(file);

        URL u = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) u.openConnection();
        conn.connect();
        BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
        String str;
        
        while((str = br.readLine()) != null){
            ps.println(str);
        }
        ps.close();
        br.close();
        conn.disconnect();
    }
    
    /**
     * @param idx 
     * @throws Exception
     */
    private static void getUrls(int idx) throws Exception{
        URL u = new URL(URL_PAGE "" idx);
        HttpURLConnection conn = (HttpURLConnection) u.openConnection();
        conn.connect();
        BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
        String str;
        while((str = br.readLine()) != null){
            if(null != str && str.contains("https://www.cnblogs.com/ccylovehs/p/")) {
                Matcher m = p.matcher(str);
                if(m.find()) {
                    System.out.println(m.group(1));
                    urlLists.add(m.group());
                }
            }
        }
        br.close();
        conn.disconnect();
    }
    
}

4.结语

如果觉得对您有用的话,麻烦动动鼠标给我一颗star,您的鼓励是我最大的动力

https://github.com/chenchangyuan/getHtmlForJava

由于不想一篇篇的手动生成md文件,下一步需要将html文件批量的转化成md文件,以便完善个人博客内容,未完待续~~~

我的博客即将搬运同步至腾讯云 社区,邀请大家一同入驻:https://cloud.tencent.com/developer/support-plan?invite_code=2kglkq1jyzc4w

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