import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import java.io.*;
import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** 必应壁纸下载* javac -encoding UTF-8 -cp .;C:\Users\administered\Downloads\jsoup-1.12.1.jar WallpaperDownload.java* java -cp .;C:\Users\administered\Downloads\jsoup-1.12.1.jar WallpaperDownload E:\\wallpaper*/
public class WallpaperDownload {private static final String BY_PREFIX = "https://bing.ioliu.cn";public static void main(String[] args) {// 运行时指定一个本地下载路径String path = "";for(int i=0; i<args.length; i++){path = args[i];}if(path == null || path.length()==0){path = "E:\\wallpaper";}File filePath = new File(path);if(!filePath.exists()){System.out.println("创建目录：" + filePath.getName());filePath.mkdirs();}System.out.println("下载位置：" + filePath.getName());download(path);}public static void download(String path) {long start = System.currentTimeMillis();String pageHtml = "https://bing.ioliu.cn/ranking";for (int i = 1; i <= 105; i++) {if (i > 1) {pageHtml = pageHtml + "?p=" + i;}try {String[] links = getAddress(pageHtml);execute(links, path);} catch (IOException e) {e.printStackTrace();}pageHtml = "https://bing.ioliu.cn/ranking";}long end = System.currentTimeMillis();long time = (end - start) / 1000;System.out.println("下载耗时：" + time);}/*** 下载图片** @param links* @param path  下载位置* @throws IOException*/public static void execute(String[] links, String path) throws IOException {if (!path.endsWith("\\")) {path = path + "\\";}for (int i = 0; i < links.length; i++) {HttpURLConnection urlConnection = getConnection(links[i]);InputStream ins = urlConnection.getInputStream();String imageName = links[i].substring(links[i].lastIndexOf("/") + 1).split("\\?")[0];File file = new File(path + imageName + ".jpg");OutputStream outputStream = null;if (!file.exists()) {outputStream = new FileOutputStream(file);int readCount;byte[] bytes = new byte[10240];while ((readCount = ins.read(bytes)) != -1) {outputStream.write(bytes, 0, readCount);}System.out.println("[" + imageName + "] download finished ...");} else {System.out.println(file.getName() + " existed ...");}}}/*** 获取下载链接地址** @return* @throws IOException*/public static String[] getAddress(String htmlPage) throws IOException {System.out.println("get [" + htmlPage + "] info ...");HttpURLConnection connection = getConnection(htmlPage);InputStream is = connection.getInputStream();String newLine = System.getProperty("line.separator");BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));StringBuilder result = new StringBuilder();String line;String html;while ((line = reader.readLine()) != null) {result.append(line + newLine);}html = result.toString();Document doc = Jsoup.parseBodyFragment(html);html = doc.body().html();String[] links = extractLinks(html);return links;}/*** 提取图片链接** @param html*/static String[] extractLinks(String html) {List<String> list = new ArrayList<>();String pattern = "/photo/.*_.*\\?force=download";Pattern r = Pattern.compile(pattern);Matcher m = r.matcher(html);while (m.find()) {list.add(m.group());}String[] results = new String[list.size()];for (int i = 0; i < list.size(); i++) {results[i] = BY_PREFIX + list.get(i);}return results;}/*** 获取连接** @param urlStr* @return*/public static HttpURLConnection getConnection(String urlStr) {HttpURLConnection urlConnection = null;try {URI uri = new URI(urlStr);URL url = uri.toURL();urlConnection = (HttpURLConnection) url.openConnection();} catch (URISyntaxException e) {e.printStackTrace();} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return urlConnection;}
}