java实现爬虫爬取小姐姐图片

一、导入jsoup的maven依赖

     <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.8.3</version>
        </dependency>    

 二、运行代码 也可以自定义爬取的网站这里就以https://gank.io/special/Girl为例

package com.song;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class SpyderTest {


    /**
     * [url=home.php?mod=space&uid=686208]@AuThor[/url] Maoyan
     * [url=home.php?mod=space&uid=264116]@data[/url] 2020/3/31 12:30
     * [url=home.php?mod=space&uid=1248337]@version[/url] 1.0.0
     */

    private static HttpURLConnection conn = null;
    private static InputStream inputStream = null;
    private static BufferedInputStream bufferedInputStream = null;
    private static FileOutputStream fileOutputStream = null;
    //利用预编译正则表达式提高效率
    private static Pattern pattern = Pattern.compile("/images/\w+");

    public static void main(String[] args) throws IOException {
        for (int i = 1; i <= 5; i++) {
            //创建url
            URL url = new URL("https://gank.io/special/Girl/page/" + i);
            //创建doc对象
            Document document = Jsoup.parse(url, 20 * 1000);
            //获取img标签
            Elements imgs = document.getElementsByTag("title");
            Elements elements = document.select("a[title][target][style]");
            for (Element e :
                    elements) {
                String image = "第" + i + "页：" + "https://gank.io" + e.attr("style");
                //正则表达式
                Matcher matcher = pattern.matcher(image);
                while (matcher.find()) {
                    System.out.println("第" + i + "页：" + "https://gank.io" + matcher.group());
                    //这里可以写成工具类
                    File file = new File("D:\picture\littlesister");
                    if (!file.isDirectory() && !file.exists()) {
                        //如果文件夹不存在则创建一个文件夹
                        file.mkdirs();
                    }
                    //生成一个唯一的标记来当作图片名称
                    String filename = UUID.randomUUID().toString();
                    fileOutputStream = new FileOutputStream(file + "\" + filename + ".jpeg");
                    //建立连接
                    URL imageurl = new URL("https://gank.io" + matcher.group());
                    conn = (HttpURLConnection) imageurl.openConnection();
                    //使用GET方法
                    conn.setRequestMethod("GET");
                    //连接指定的资源
                    conn.connect();
                    //获取输入流
                    inputStream = conn.getInputStream();
                    //新建buffer缓冲流包装输入流
                    bufferedInputStream = new BufferedInputStream(inputStream);
                    //创建大小为1k的"水桶"
                    byte[] bytes = new byte[1024];
                    //用于保存实际读取的字节数
                    int hasRead = 0;
                    //循环取水
                    System.out.println("开始下载第" + i + "页的图片");
                    while ((hasRead = inputStream.read(bytes)) > 0) {
                        fileOutputStream.write(bytes, 0, hasRead);
                    }
                    System.out.println("第" + i + "页的图片下载完成");

                    //释放资源
                    fileOutputStream.close();
                    bufferedInputStream.close();
                    inputStream.close();
                }

            }

        }
    }
}

 上效果图

做壁纸啥的是够了，当然也可以适当的多喝营养快线~~~