因此，我尝试使用jsoup来刮除图像的Reddit，但当我刮除某些子Reddit（如/r/wallpaper）时，我遇到了一个429错误，我想知道如何修复它。完全理解这段代码很糟糕，这是一个很普通的问题，但我对此完全陌生。无论如何：

import java.io.IOException;

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

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import java.io.*;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jsoup.Jsoup;

import org.jsoup.nodes.Attributes;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;
import java.net.URL;
import java.util.Scanner;

public class javascraper{

public static void main (String[]args) throws MalformedURLException
{
    Scanner scan = new Scanner (System.in);
    System.out.println("Where do you want to store the files?");
    String folderpath = scan.next();
    System.out.println("What subreddit do you want to scrape?");
    String subreddit = scan.next();
    subreddit = ("http://reddit.com/r/" + subreddit);
    new File(folderpath + "/" + subreddit).mkdir();

    //test

    try{
        //gets http protocol
        Document doc = Jsoup.connect(subreddit).timeout(0).get();

        //get page title
        String title = doc.title();
        System.out.println("title : " + title);

        //get all links
        Elements links = doc.select("a[href]");

        for(Element link : links){

            //get value from href attribute
            String checkLink = link.attr("href");
            Elements images = doc.select("img[src~=(?i)\\.(png|jpe?g|gif)]");
            if (imgCheck(checkLink)){ // checks to see if img link j
                System.out.println("link : " + link.attr("href"));
                downloadImages(checkLink, folderpath);
            }
        }
    }
    catch (IOException e){
        e.printStackTrace();
    }
}

public static boolean imgCheck(String http){
    String png = ".png";
    String jpg = ".jpg";
    String jpeg = "jpeg"; // no period so checker will only check last four characaters
    String gif = ".gif";
    int length = http.length();

    if (http.contains(png)|| http.contains("gfycat") || http.contains(jpg)|| http.contains(jpeg) || http.contains(gif)){
        return true;
    }
    else{
        return false;
    }
}

private static void downloadImages(String src, String folderpath) throws IOException{
    String folder = null;

    //Exctract the name of the image from the src attribute

    int indexname = src.lastIndexOf("/");

    if (indexname == src.length()) {
        src = src.substring(1, indexname);
    }
    indexname = src.lastIndexOf("/");

    String name = src.substring(indexname, src.length());

    System.out.println(name);

    //Open a URL Stream

    URL url = new URL(src);

    InputStream in = url.openStream();

    OutputStream out = new BufferedOutputStream(new FileOutputStream( folderpath+ name));

    for (int b; (b = in.read()) != -1;) {

        out.write(b);

    }

    out.close();

    in.close();
}

}